![STScI: Hubble Uses Earth as a Proxy for Identifying Oxygen on Potentially Habitable Planets Around Other Stars](https://www.aura-astronomy.org/wp-content/uploads/2020/08/STScI-H-p2030a-f-1410x785-1-348x198.jpg)
STScI: Hubble Uses Earth as a Proxy for Identifying Oxygen on Potentially Habitable Planets Around Other Stars
Taking advantage of a total lunar eclipse, astronomers using NASA's Hubble Space Telescope have detected Earth's own brand of sunscreen ...