Larger Rocky Planets Might be Rare Because They Shrunk

Astronomers Confirm Third-Nearest Star With a Planet – And It’s Rocky Like Earth

May Skywatching Tips: A Rocky Planet Round-Up and a Super Blood Moon Eclipse

In the search for life, oxygen in a planet’s atmosphere is one potential sign of biological activity that might be detected by future telescopes. A new study, however, describes several scenarios in which a lifeless rocky planet around a sun-like star could evolve to have oxygen in its atmosphere.