The big question: are we alone in the universe, or is there life somewhere else? Our telescopes comb through space. Discover bizarre worlds. Will we ever find a second earth? In the last 50 years, our space probes have reached every planet in the solar system. There is no evidence of extraterrestrial life. The exploration continues. New missions are now exploring exoplanets that lie outside of our solar system. Hundreds of billions of planets each have the potential to revolutionize our understanding of how the Earth formed. Including rocky planets with the right distance to their star to have the most important ingredient for life : liquid water. But even these rocky planets offer no security.
In the Milky Way there are worlds burned by twin suns or ejected from their parent stars, wandering alone through the eclipses of space. The messages we sent into the cosmos remain unanswered for the time being. The telescopes we use to look for extraterrestrial signals show nothing. The earth is the only living world we know. Whether or not it's the only planet harboring intelligent life, one thing is certain: the answer to the question, "Are we alone?" will change everything.
