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Do you think it's possible to maintain life on other planets? Since there are billions of galaxies, shouldn't there be trillions of planets? If so, couldn't there be a planet like Earth, rotating around the sun and maintaining life?

Absolutely. I certainly think so. There are also almost certainly types of life in the universe which live in conditions different from that of Earth: different temperature ranges, chemistry, etc. Of course, at this point, no one has ever actually detected extraterrestrial life.

This page was last updated June 27, 2015.

About the Author

Dave Kornreich

Dave was the founder of Ask an Astronomer. He got his PhD from Cornell in 2001 and is now an assistant professor in the Department of Physics and Physical Science at Humboldt State University in California. There he runs his own version of Ask the Astronomer. He also helps us out with the odd cosmology question.

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