2017 has just begun, it's a good time to share our predictions. What should we expect from 2017? What should we look forward to? What are your plans for 2017?
Ciro Villa (technologist, application developer, STEM communicator)

As technologies in the realm of machine intelligence and data analysis continues to advance, I expect that the results stemming from the amalgamation of additional astronomical information will spur more announcement and presentations of discoveries in the field of deep space astrophysics and cosmology with important new theoretical dissertations regarding the nature of dark matter and dark energy. Additionally, I anticipate further exciting discoveries in terms of exoplanets and subsequently an increase in the pool of confirmed exoplanets.

I believe one of, if not the most anticipated astronomical event for 2017 is the upcoming Total Solar Eclipse to occur on August 21. This eclipse will be of peculiar interest as it will be visible for a rather large swath of the continental United States, albeit comprising a relatively narrow “band” across a multitude of States.

As far as plans for the new year are to do my best to continue to inform and try to enthuse the public regarding anything related to space and space exploration, and, barring other life priorities, continue to divulgate valuable information, news and content on new and exciting progress and discoveries.

Antonio Paris (Astronaut Candidate, Astronomy Professor, Planetary Scientist, Space Science Author)

I suspect, as is the case for the past 10 years, that we will discover a variety of extrasolar planets. Of these discoveries, 1-2% will be cataloged as potentially Earth-like planets. The James Webb Telescope, moreover, will be reaching final completion and just like many of you, I anticipate new discoveries that will reshape the field of astronomy - and science.

Matthew Greenhouse (Astrophysicist at NASA Goddard Space Flight Center working on James Webb Space Telescope)

The New Year will be an exciting one for NASA Astrophysics and the missions that I am involved in. The James Webb Space Telescope (JWST) is in the final stages of testing ahead of its 2018 launch date. During this year, the international science community will submit their first proposals to use the JWST. Observing proposals for Early Release Science are due during August. The first call for General Observing proposals will occur during November 2017 with proposals due during March 2018.

The Stratospheric Observatory for Infrared Astronomy (SOFIA) began its primary operations phase during May 2014, and continues to provide the science community’s only general access to the far-infrared spectrum (which contains half of the light in the universe). A new science instrument, called HAWC+, enters fully commissioned service this year. This instrument provides far-infrared imaging polarimetry at unprecedented angular resolution providing a new window on the study of magnetic fields in space. The High Resolution Mid-Infrared Spectrometer (HIRMES) is in full development this year, and is expected to begin operations during early 2019. During spring of this year, NASA will solicit proposals for development of an additional science instrument and will issue the 6th call for general observing proposals to use SOFIA.

NASA continues to develop a vibrant capability to study exoplanets and to search for evidence of life on them via spectroscopy of their atmospheres. A key starshade technology development activity gets underway this year to ensure that the most promising technologies for characterization of Earth-like planets will be to ready for mission prioritization by the 2020 Decadal Survey.

A January 2017 snap shot of NASA Astrophysics plans and progress can be found here.

Mike Simmons (Founder and CEO of "Astronomers without Borders")

The big news in the US is the total solar eclipse that crosses the entire continent, from the Pacific to the Atlantic, in August of this year. But it's more than just a single-country event. This celestial event will be seen by more people than any other in history. People from countries around the world are coming to the US for this historic event.

Astronomers Without Borders will be supporting schools in underserved communities -- inner cities, Native American reservations, and more -- not only with resources for the eclipse but for continuing STEM education using the Sun after the inspirational experience of the eclipse. It's one of many efforts to get as many people as possible to view the eclipse, and to keep them looking up afterward.

Global Astronomy Month in April will be the biggest yet. There are new partners and new programs that we hope will engage even more participants around the world. SunDay -- a day for public outreach with the Sun -- will focus on the eclipse this year. There will be a new cultural program under the AstroArts banner. The Global Star Party will be the opening event on April 1. That's going to be a very exciting day when we can all observe and work together.

I'm sure there will be celestial surprises as well. That's part of the fun of astronomy. There are some wonderful events we know about but what surprise us? A bright comet, a bright nova, a large meteor strike? We'll have to wait and see.

Little green/grey men

There where hundreds of movies and tv-series showing extraterrestials from distant worlds. Giving how life on our planet evolved and considering basic components necessary for intelligent life to emerge, who in your oppinion might have been the closest in depicting alien visitors from outer space? 

Mike Simmons (Founder and CEO of "Astronomers without Borders")

There's really no way to know until we start finding other life. We know the components and evolution of life on Earth but there could be other ways life can be created. Astrobiologists have done a lot of work in this field trying to determine what the possibilities are but without data we're pretty much blind.

The common feature of most TV shows and movies is that intelligent alien life is somewhat humanoid. That makes sense for anything made before computer generated graphics (CGI) since actors are (mostly) human. With CGI anything is possible now but who knows?

Antonio Paris (Astronaut Candidate, Astronomy Professor, Planetary Scientist, Space Science Author)

I consider myself a science fiction aficionado as well as a (takes a deep breath) UFO buff. It is safe to say, therefore, that I have seen my share of what extraterrestrials “should look like”, according to Hollywood and so-called UFO witnesses. Unfortunately, most, if not all, of these so-called "aliens" are a direct results of anthropomorphic biases – bestowed upon us by the greatest of all special effects artists on one side and alleged UFO encounters on the other.  In a nutshell, the biases have directly shaped what extraterrestrials, from a human perspective, should look like. Most, if not all, of these aliens appear to look strikingly similar to us: a head, two eyes, nose, mouth, two arms, two legs, and in some astonishing situations, they even speak … English. Nonetheless, If I were to chose my favorite “alien”, I would focus on the latest movie The Arrival. These extraterrestrials, which are heptapods, sparked my interested in contemplating what type of planet these aliens could have evolved on. Because they were large and could not breath oxygen, we can speculate that gravity and a unique atmosphere directly influenced these aliens. Nevertheless, The Arrival is science fiction and any portrayal of extraterrestrials, from humans, will unquestionably be wrong.

Nicole Guggliucci (“Noisy astronomer”, blogger, educator, post-doc)

I think it's safe to say that none of us have any CLUE what life might look like... just talk to a biologist to get a sense of the complexity and seeming randomness of life on Earth and its evolutionary pathways.

That said, I loooves me some science fiction and fun speculation. Of course, scifi for tv and film is often limited. In order to tell compelling stories over long periods of time with complex characters, you often need human actors. Thus, we get the "humanoids with bumpy foreheads" in so much of our television and movies. Even with CGI available to us, storytellers will create humanoid forms because that is what we tend to identify with emotionally.

I like to sneak off to books to find truly bizarre descriptions of potential alien sentients. My favorite is the Galactic Football League series by Scott Sigler. Though his universe teems with intelligent creatures with all kinds of bizarre (though, admittedly, often Earth-like) forms, and their physiology determines what positions they play in American football. I can't think of a better way to get a sports fanatic excited about science fiction! It also makes for some bizarre cosplay options when we go to conventions... Anyway, with full color illustrations in some of the books in the series, you can really enjoy the possibilities for sentient species there.

Andrew Rader (SpaceX engineer, MIT PhD, author)

Probably one of the most realistic is 'Contact' with Jody Foster based on Carl Sagan's book of the same name. In a nod to Fermi's Paradox, the Vegans (people of Vega, not non-meat eaters) developed technology first and are thus far more advanced than we are. They don't so much visit Earth as give us a technological boost to help us transcend our basic corporeal bipedal primate existence.

Paul Carr
(Space Systems engineer at NASA, podcaster, blogger, investigator)

To me, science fiction movies and TV shows are not so much about aliens, but about ourselves - human myths, nightmares, hopes, and aspirations. For example, Klaatu in The Day the Earth Stood Still is not alien at all - he is an idealized human, and in fact brings the Christ story into the atomic age. ET seemed to follow a similar pattern, but he wasn't as preachy. Most of the Star Trek aliens are really just exaggerations of human traits that we either fear, admire or detest, and Q is not unlike the all-powerful, omniscient, severely judging God of our Abrahamic religions. I have to admit a mild fascination with the Vulcans. What would it be like to always act rationally?I don't know the answer to that question, but I don't think Vulcans are really all that alien.

Aliens that were really alien would be too hard to understand and would not serve a good role in an entertaining narrative. They would, I expect, be about as far from Dr. Who or Chewbacca as I am from a three-toed sloth. I am not talking about how the aliens look, or how many eyes they have, or whether they swim in a vat of blue liquid - details I regard as relatively unimportant. What you won't see on the surface is how they evolved, which governs to a great extent how they approach and perceive reality and how they think. If, as would be necessary for visitors from other worlds, they are the creators (or at least the heirs) of unimaginably advanced technology, then they think with great power and solve problems we don't even know exist. We don't even understand yet just how alien this would make them, or how absurd and puzzling their motives and actions would be to us. We certainly don't know why there would be here, but it is unlikely to kill us, to eat us, or save us from ourselves.

Such aliens as I imagine, if they exist, would make lousy movie villains or heroes, but I wish someone would try it.

Ciro Villa
(technologist, application developer, STEM communicator)

Although we envision aliens mostly looking like us, there is no reason to not think that some yet to be discovered chemical and organic mechanisms, might exist elsewhere in the Universe that allowed for the rise on other worlds for the formation and rise of species that do not even remotely resemble us.

Just by looking at the shear diversity of Carbon based life forms right here on Earth, gives room to imagine the existence of many other varied types of non-anthropomorphic looking alien being. It is hard to pinpoint one fictional representation of an alien species by one of the many Science fiction artworks. But if one popular franchise comes to mind, that would be Star Trek. In their long running shows, the creator of this, one of the most successful sci-fi/space franchises have been able to present a tremendous diversity of alien species to the audience, thus sparking the light of imagination in the human mind.

Farewell Rosetta!

rosetta-im-all_xlFew weeks ago Rosetta probe deliberately crashed into comet 67P/Czuriumow-Gierasimienko ending it’s 12 years mission. What did we learn from this mission? What is the most interesting discovery that came from landing on a comet for the first time in history?

Nancy Atkinson (Senior Editor for Universe Today, Host of the NASA Lunar Science Institute podcast & a NASA/JPL Solar System Ambassador)


The Rosetta mission has been an absolute joy to witness, with its great success, surprising findings, and unique public outreach from the team that included cute videos and cartoons. The images have been nothing short of stunning and being able to see a comet close-up like this is just eye-candy: views of cliffs, rockslides and boulders, spraying jets and of course the duck-shaped comet itself.

Some of the discoveries are really exciting, such as finding amino acids that are the building blocks of life on the comet; finding out Comet 67P sings, and finding molecular oxygen. One of the most surprising findings is that the chemical signature of the comet’s water is nothing like what we have on Earth, which contradicts the long-standing theory that comets pummeling Earth supplied our planet with water. Don’t fret the mission is over, as scientists will be studying Rosetta’s observations for years to come, so we’ll definitely be hearing from Rosetta again.

Andrew Rader (SpaceX engineer, MIT PhD, author)


This mission was important for a lot of reasons. From a scientific perspective, it tells us about an object from the far reaches of the Kuiper Belt and probably as old as the formation of the solar system. What are it’s characteristics and composition? Could comets have brought water to Earth, or even the building blocks for life?

From a practical perspective, we learned that we can rendezvous with and land on a type of object that might one day pose a dire threat to our planet. Alternatively, such a comet could potentially be useful in providing raw materials while we hitch a ride far out into space.

Antonio Paris (Astronaut Candidate, Astronomy Professor, Planetary Scientist, Space Science Author)


Hundreds of years from now, when our ancestors look back at the early years of space exploration, there are no doubts the Rosetta mission will be among the top list of achievements. The rendezvous with comet 67P, which is an achievement of its own, will harness scientific data for generations. Recent mission data, however, has already re-drawn the cometary landscape and astronomers have been left to re-write textbooks when it comes to comets. For example, we have learned 67P interacts with the solar wind, a significant amount of water has been discovered on the comet, and that perhaps comets, at least in this case 67P, was not responsible for bringing water to Earth billions of years ago. We have a lot of work ahead of us and the data from Rosetta will take years to study – an exciting time for astronomers!

Ciro Villa (technologist, application developer, STEM communicator)


Being able for the first time in the history of mankind to approach, orbit and land on a 4 kilometers wide chunk of rock and ice coming from the fringe of our solar system, located at about half a billion kilometers away from us and traveling around the Sun at a velocity of about 135,000 kilometers per hour, was a tremendous feat of human engineering in it of itself. This is exactly what the Rosetta mission has been able achieve during its groundbreaking mission.

Indeed, a vast amount of science has been done by Rosetta during the 786 days of its mission spent around the comet operating in a prohibitive and unforgiving environment. We have learned a great deal more than we used to know about the complexity of the composition of comets such as 67P and we have learned how difficult it is to perform with extreme precision the sort of mission activities that the Rosetta mission team could do and how small the margin of error is for space missions in general and for something as complex as the Rosetta mission.

Despite problems experienced during the touchdown of the Phoebe lander, the Rosetta mission’s team was still able collect a vast trove of scientific data that will be analyzed for decades to come, as well as being able to accomplish a series of important scientific milestones. For instance, among the most outstanding discoveries was that of the presence of a peculiar “songlike” magnetic field probably caused by the solar wind.

Additionally, the discovery of the presence of various molecules originating from the comet ‘s nucleus as well as the presence of water of a different composition of that present here on Earth, were among other findings that have made an impact within the scientific community. All in all, the mission, culminating with the planned crash of Rosetta on the surface of the comet, was a definite success and as a provider of lesson learned, an important precursor for other future missions to small bodies such as asteroid and comets that would have tremendously important value and implications for the future of mankind.

To boldly go where no man has gone before

Many associate survival of our species with humanity becoming a interplanetary civilization. It’s important to prepare ourselves for an event that might one day force us to leave our home planet. In more distant future we might have to leave our solar system. Will we ever become an intergalactic civilization like we already are in science-fiction? What’s the hardest obstacle to overcome?

Fraser Cain (publisher at Universetoday.com, co-host of Astronomy Cast)


The hardest obstacle to overcome is the weightless environment of space itself. Humans evolved in Earth’s gravity, and without it, our bones soften, our muscles atrophy, and our bodies suffer. Until we can develop some kind of artificial gravity environment, like a rotating space station, space travel will be lethal for any length of time. We need to first learn to just live and survive in space before we have any hope of reaching out to another star system.

Andrew Rader (SpaceX engineer, MIT PhD, author)


If we survive for the next 100 years, I think we will become an interstellar civilization (although maybe not for several hundred years – the first step is to expand into our solar system first). The greatest challenges are in rough order of difficulty starting with the most challenging: I) Surviving long enough to reach the stars (avoiding disaster on our planet, whether created by humans or something external); II) The will to expand beyond Earth (will we even choose to do so, or will we for example, transcend into AI); III) The vast distances involved and the technological challenges involved. These include the velocity you need to travel and/or time it would take to get to another star, and the energy you would need to be able to produce for an exceedingly long time at a great distance from any light or heat from the Sun (even our best nuclear technology can’t currently do this). It’s a problem of distance, time, and energy. Here’s a links to my videos about it.

Robotic: https://www.youtube.com/watch?v=Lt0YMLvgT5k

Human colonization: https://www.youtube.com/watch?v=0m7gcZLUcPU

Antonio Paris (Astronaut Candidate, Astronomy Professor, Planetary Scientist, Space Science Author)


Emigrating beyond Earth is not a difficult task from a technological perspective. The current challenges are more centered on budgets rather than technology or human will. The most difficult challenge of interplanetary travel, in my opinion, is the challenge of humanity. Humans, today, are in the brink of destroying ourselves and our planet as well. The human population is increasing at an exponential pace while Earthly resources are diminishing at equal speed. Humans, eventually, will nonetheless have to travel beyond earth to survive as a species. We must, however, overcome the most difficult obstacle we conveniently ignore: the will to get along with other humans.

Pamela Gay (assistant research professor at Southern Illinois University, writer, co-host of Astronomy Cast)


Our science fiction stories show humanity escaping out to the stars, but our more terrestrial reality seems determined to keep us grounded. Two major problems currently face us. The first, quite simply, is resources. Human space exploration is a rich nation’s possibility, and as our global economy flattens, it is becoming harder to imagine any government-driven effort to colonize other worlds and other solar systems. At the same time, it’s impossible to predict what commercial space will make possible, and the extreme wealth of an elite few may be able to fill in gaps left by governments. While money is a current problem that has the potential to go away, the second problem is more likely to stay. That problem is human frailty. We are a race that can die from environmental extremes and disease. We periodically wage war, and we release toxins into our environment through our accidents and ignorance. The real question is, will we stay alive long enough to overcome money?

Ciro Villa (technologist, application developer, STEM communicator)


Be it for natural or man-made causes, there are a variety of possible future scenarios that we earthlings could face that could bring about the end of humanity or even life in its entirety here on Earth. This is why it is important to give serious consideration to plans for us to become a space faring civilization. Although we have a long way to go to arrive at the necessary level of technology and for us to be able to overcome a number of practical obstacles to make this feasible, it is important to start working toward this goal, this way at least our future generations can hope for the continuation of our species by embarking on “space lifeboats” toward new galactic shores. This is not going to be easy and it is going to take time and effort. We are now just making our first “baby steps” toward understanding how the human body reacts to hostile space environments and the lack of gravity and questions about our ability to withstand space environments are just now attempted to be answered with the hard work of our astronauts on the International Space Station. Probably one of the hardest obstacle to overcome is going to be having the ability to take down the barrier of skepticism of large portions of the public as a whole and raise realistic and not alarmist awareness that we live on a very fragile planet and that it is important to build contingency plans to leave it if we want the continuation of our species. Of course we hope that we will be able to achieve this goal before it will be too late.

Paul Carr (Space Systems engineer at NASA, podcaster, blogger, investigator)


I tend to be skeptical of top-down views of the human future, and the more our species is spread out into the solar system, the more it will diverge, with separate populations each pursuing their own interests. From, this is an optimistic view. The kings and battles view of history has always been something of a delusion, and I think in the future it will become clear, with hopefully no kings and many fewer battles. So, I think the simple-minded notion of a colossal public works project sending great arks full of people in uniform to seed humanity among other worlds is not only unlikely, it is undesirable and likely to fail. Someone with the power to make that happen has too much power. However, I do believe that as mastery of space travel, energy and information compounds, our wealth will grow to the point that the project of embarking with one’s friends and families to the stars is a choice many will have. How this will be accomplished I don’t know, and neither does anyone else, just as the hunter gatherers just before the neolithic revolution could not possibly see what their world was about to become. It is only an approximate result, but Daniel Cartin estimated that the range needed from a starship in order to establish a network of colonies in the local solar neighborhood was about 10 light years. That’s a long distance from the human perspective, but is a cosmic stone’s throw, and when humans can live for hundreds of years and casually command petawatts of power, it will not be a daunting sea to cross. By then, we may not even need to send biological bodies – just beam our minds ahead at the speed of light after the ship arrives at a suitable destination. It would of course, take millions of years to colonize even part of the galaxy, and such a diaspora could easily lose steam after a while. Still there is the chance it will continue until we either collide the current residents or fill up the available resources. Of course, by “we” I mean descendants of humans, but they will be fragmented into at least as many many societies as solar systems they occupy. There will be no emperor. How we go from there to an intergalactic society I have no idea. Crossing ten, or even a hundred light years is nothing compared to crossing millions of light years. Each of is free to imagine their own scenario, but I have no idea how it could happen.

Vacation on the ISS

Everyone at least a little bit interested in space and astronomy dreams about going into space. There were 7 space “tourists” that paid money to go to the Internation Space Station. If given the opportunity to go for a little vacation in Earth’s orbit, would you take up that chance? How would you spend that time?

Andrew Rader (SpaceX engineer, MIT PhD, author)

Of course! (And hopefully beyond orbit too.)  Most people get space sick for the first few days in space from the changes in the way 0G accelerations are perceived in your inner ear, but hopefully that wouldn’t distract too much from the incredible views of our home planet and the sheer joy of floating free in microgravity. With views and fun combined, it space should prove to be one of the finest travel destinations imaginable. However, I think the main reason to go to space is to learn how to live there longer term. I’d want to be productive in actually building and testing hardware, conducting experiments, and paving the way for the long term settlement of space.

Ciro Villa (technologist, application developer, STEM communicator)

If given the opportunity, I would absolutely take the once in a lifetime chance to go up in space on the ISS.  Many people do not realize and appreciate the fact that all the hard work astronauts do up there in orbit day in and day out benefits us all down here on Earth.  Many of the technological and scientific advancements that have improved our quality of life right here on Earth have been spear headed by the research and experiments performed in the unique, natural zero gravity laboratory that the Earth’s orbiting space station provides, which has yielded so many invaluable findings and discoveries regarding how things behave in the absence of gravity. So, how would I spend my time up there?  Well, I suppose that would depend on what I would be allowed to do.  If under the constraint and watchful eye of my sponsoring government agency, then I would probably not have much of a choice but do the daily work and conduct the scheduled experiments which would be a great experience and opportunity all by itself.  But if I had “free reign”, then I would probably exploit technology to the max, of course!  Explore, investigate, and learn all that I could and then share with the public.  Have video conferencing, live updates, in short let the world see what I see and share my experiences in real time.  Plus hopefully enjoy some space pizza… http://news.bbc.co.uk/2/hi/americas/1345139.stm

Paul Carr (Space Systems engineer at NASA, podcaster, blogger, investigator)

Given that I could afford it, you bet I would. I imagine I would spend much of the time staring out of the observation window at the Earth, camera ready. The rest of the time I would spend learning the details of astronaut life and tumbling around in microgravity. I would volunteer to help out with any of the regular work as well, and perhaps they would humor me a bit. No Bowie covers, though, which is best for all concerned.

We’re here!

We find new exoplanets every day, we found more than 3000. We’re very close to finding a planet very similiar to Earth that harbors life. What do you think about possibility of some other civilization discovering our planet and thinking “Wow, this planet may harbor life, it’s “OurPlanet”‘s size and in it’s star habitable zone?” How would our planet look like to a life forms like us located light years away?

Andrew Rader (SpaceX engineer, MIT PhD, author)

The answer to the question depends on their detection technology. If they merely found an average G2V star with 8-10 planets around it with a couple (Earth and maybe Mars) in the habitable zone, they’d probably simply add it to their catalog. If they were able to measure the composition of Earth’s atmosphere, they might realize that life thrived here and wonder what kind of life. If they were able to monitor and track our atmospheric composition over time, they might realize that an advanced civilization existed, but also one causing precarious changes in atmospheric concentrations of gasses like C02. This might raise the question of how wise our civilization really is, and how long it might survive.

Fraser Cain (publisher at Universetoday.com, co-host of Astronomy Cast)

Any alien civilization that turned a powerful telescope on Earth over the last 500 million years or so would have known there’s life here by the composition of our atmosphere. And if they were sophisticated enough, they’d know what stage of the industrial evolution we’re in because of the pollution in our atmosphere. The fact that there’s life on Earth is no secret to advanced civilizations. And this is the technique that we’re about to use to find aliens around us with the next generation telescopes like James Webb.

Antonio Paris (Astronaut Candidate, Astronomy Professor, Planetary Scientist, Space Science Author)

There are potentially billions of planets in our Milky Way alone. Some of these planets could harbor intelligent life capable conducting a survey of planets as well. However, we do no have any information to suggest that an intelligent species elsewhere in the Universe can understand astronomy, or for that matter planetary science, like we do. Humans, for example, have a predisposed bias to look for planets similar to Earth because we concentrate on “comparative science”, meaning we search the cosmos for “Earth-like” planets. An intelligent species that has evolved in a planet completely different than earth, including an atmosphere not comparable with Earth, could perhaps discover Earth but categorize our planet as “non-inhabitable. It is a matter of perspective.

Nicole Guggliucci (“Noisy astronomer”, blogger, educator, post-doc)

I just finished up my “Life Beyond Earth” class for the semester, so this topic has been on my mind a bit. I imagine that a civilization light years away would be interested in the presence of oxygen in our atmosphere, which typically only exists in stable form when being put out by photosynthetic life forms. A nearby civilization would probably be able to pick up our radio transmissions, but that’s IF they had sensitive enough receivers and IF they were looking in the right place. But that’s only a small bubble around us, less than 100 light years or so. I think the oxygen in our atmosphere would give away signs of life far before any of our human-created signals reached another civilization. We’ll be doing the same, by the way, as we analyze exoplanet atmospheres with the present and next generation of telescopes.

Ciro Villa (technologist, application developer, STEM communicator)

It’s an exciting and somewhat scary thought at once to think of the possibility of an extraterrestrial civilization becoming aware of our presence in the Universe with a whole series of other emotions mixed right in between.  We as humans are at the dawn of a new, exciting era of exoplanetary science and discoveries brought about by the extraordinary and accelerating advancements in our technologies.  We can see further and deeper in the Universe and our space “eyes” are getting more and more accurate.  Of course an extraterrestrial civilization finding our planet (exoplanet to them) could be more or less advanced than we are, so depending on their level of technological sophistication, could just be wondering about us as we do today or have the capability of being able to do more in order to find out if indeed there’s life on Earth or learn of our presence.  They might have the technology to easily and quickly analyze Earth or, like us they might be left wondering.  There are those that speculate that indeed there might also be a species that already know of our presence; we don’t know.  That’s when wide range of possibilities might present themselves.  We don’t know how similar this hypothetical species really is to us, neither do we know their history, the history of their evolution, their feelings, emotions, desires.  So, the number of variable and possibilities are pretty numerous and complex and the room for speculation is vast.