Scientists have discovered a simple and reliable test for signs of past or present life on other planets -- 'the holy grail of astrobiology.' Researchers report that, with 90% accuracy, their ...

On Earth, water is so intertwined with life that our search for life on other worlds is essentially a search for water. When ...

And many working in the field believe that it is a matter of when, rather than if, they discover life on other worlds. And rather than bringing fear, the discovery of alien life will bring hope ...

“Astronomers have detected the most promising signs yet of a possible biosignature outside the solar system, although they remain cautious,” states a Cambridge University press release.

When looking for planets that might support life in our galaxy and beyond, astronomers are looking for conditions that are just right to create the “Goldilocks zone.” This is also called the ...

The question of whether Earth is alone in harboring life has captivated humanity for millennia. In recent years, scientists have turned to Earth-like planets in other solar systems that may show the ...

The author’s book. Andrea Frazetta. We discovered them on asteroids and the dwarf planets Ceres and Pluto, and these are only a few examples. Much farther away still, nearly 200 hundred types of ...

One such moment was when space craft sent back images of the Earth for the first time. Another is the discovery of life on another world, a moment that has inched a little closer today with the ...

Green light isn’t the only green flag to search for life on other planets. A new guidebook will help astronomers to look for purple, brown, orange and yellow hues reflected from worlds dominated ...

With over 5,000 exoplanets — planets beyond our solar system — discovered to date, there's a growing interest in locating which of these planets might be habitable. It's no easy matter to find ...

When you don't know what to look for, it's often best to start looking for what humans know life looks like on other planets. Skip to content. Introducing the all-new Astronomy.com Forum!

The earliest life forms on Earth may have been purple. This theory could give us insight into what life on other planets might look like.