What an Exomoon Would Look Like from Earth [Video]

Moons orbiting distant planets might be visible in existing spacecraft data

Join Our Community of Science Lovers!


On supporting science journalism

If you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.


In “Astronomers Search for Moons Circling Distant Exoplanets” author Lee Billings explores the hunt for moons orbiting distant planets—exomoons. The project uses data from the Kepler satellite mission, which (until technical issues sidelined it earlier this year) had been focusing on a single spot in the sky in the hope of catching so-called “transits”—instances when an exoplanet would pass in front of its host star, blocking some of the light. If any moons orbited those planets, they could also be visible in the data. This video animation by Alex Parker, a postdoctoral researcher at the University of California, Berkeley, shows what a theoretical exomoon would look like.

The Hunt for Exomoons - Lightcurve Demo from Alex Parker on Vimeo under a Creative Commons license.

Michael Moyer is the editor in charge of physics and space coverage at Scientific American. Previously he spent eight years at Popular Science magazine, where he was the articles editor. He was awarded the 2005 American Institute of Physics Science Writing Award for his article "Journey to the 10th Dimension," and has appeared on CBS, ABC, CNN, Fox and the Discovery Channel. He studied physics at the University of California at Berkeley and at Columbia University.

More by Michael Moyer
Scientific American Magazine Vol 310 Issue 1This article was published with the title “What an Exomoon Would Look Like from Earth [Video]” in Scientific American Magazine Vol. 310 No. 1 ()
doi:10.1038/scientificamerican012014-1BTnXpjDOi07EhHUSmraMP

It’s Time to Stand Up for Science

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in that two-century history.

I’ve been a Scientific American subscriber since I was 12 years old, and it helped shape the way I look at the world. SciAm always educates and delights me, and inspires a sense of awe for our vast, beautiful universe. I hope it does that for you, too.

If you subscribe to Scientific American, you help ensure that our coverage is centered on meaningful research and discovery; that we have the resources to report on the decisions that threaten labs across the U.S.; and that we support both budding and working scientists at a time when the value of science itself too often goes unrecognized.

In return, you get essential news, captivating podcasts, brilliant infographics, can't-miss newsletters, must-watch videos, challenging games, and the science world's best writing and reporting. You can even gift someone a subscription.

There has never been a more important time for us to stand up and show why science matters. I hope you’ll support us in that mission.

Thank you,

David M. Ewalt, Editor in Chief, Scientific American

Subscribe