February 23, 2017

Newly Discovered Earth-like Planets Hold Promise for Life

Arizona planetary scientists anxious to learn more

Trappist exoplanets_hero This artist's concept depicts what it would be like to stand on the surface of the exoplanet TRAPPIST-1f, located in the TRAPPIST-1 system in the constellation Aquarius. (PHOTO: NASA )

LISTEN

NASA’s announcement of planets outside our Solar System that could be like Earth have Arizona scientists excited about the possibilities for life on them.

NASA officials say they found seven Earth-sized planets orbiting a single star 40 light years from Earth. Three of them could be in a region where a rocky planet is most likely to have liquid water, a key element for life.

Tucson-based Planetary Science Institute astrobiologist David Grinspoon models the climates of planets that orbit a star other than our sun.

“It’s really an incredible discovery to learn of a relatively nearby system of planets where there are so many Earth-sized planets orbiting together, including several that seem to potentially be in the right zone of distance from the star that they might have the climate conditions conducive to life. That’s really exciting,” Grinspoon said.

NASA scientists say the discovery will open the door for future study of the potentially habitable planets, including the makeup of their atmospheres. The James Webb Space Telescope scheduled to launch in 2018 will provide greater detail for study.

Arizona Science Desk
This story is from the Arizona Science Desk, a collaborative of the state's public radio stations, including NPR 89.1. Read more from the Arizona Science Desk.
By posting comments, you agree to our
AZPM encourages comments, but comments that contain profanity, unrelated information, threats, libel, defamatory statements, obscenities, pornography or that violate the law are not allowed. Comments that promote commercial products or services are not allowed. Comments in violation of this policy will be removed. Continued posting of comments that violate this policy will result in the commenter being banned from the site.

By submitting your comments, you hereby give AZPM the right to post your comments and potentially use them in any other form of media operated by this institution.
Arizona Public Media broadcast stations are licensed to the Arizona Board of Regents. Arizona Public Media and AZPM are registered trademarks of the Arizona Board of Regents.
The University of Arizona