#Hubble uses Earth as proxy for identifying oxygen on potentially habitable exoplanets
“#Hubble uses Earth as proxy for identifying oxygen on potentially habitable exoplanets” This illustration shows the Hubble Space Telescope superimposed on an image of the Moon, seen during a lunar eclipse. Taking advantage of a total lunar eclipse in January 2019, astronomers using NASA’s Hubble Space Telescope have detected ozone in Earth’s atmosphere. This method…