There are at least 300 million potentially habitable planets in our galaxy, NASA finds

By Jessie Yeung, CNN

Updated 0457 GMT (1257 HKT) November 6, 2020

This illustration shows the metaphorical measuring of the density of each of the seven planets in the nearby TRAPPIST-1 system. New measurements have revealed the most precise densities yet for these planets and they're very similar -- which means they also likely have similar compositions.
Photos: Weird and wonderful planets beyond our solar system
This illustration shows the metaphorical measuring of the density of each of the seven planets in the nearby TRAPPIST-1 system. New measurements have revealed the most precise densities yet for these planets and they're very similar -- which means they also likely have similar compositions.
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This artist's illustration shows the view from the furthest planet in the TOI-178 system.
Photos: Weird and wonderful planets beyond our solar system
This artist's illustration shows the view from the furthest planet in the TOI-178 system.
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This artist's illustration shows TOI-561b, one of the oldest and most metal-poor planetary systems discovered yet in the Milky Way galaxy. Astronomers found a super-Earth and two other planets orbiting the star.
Photos: Weird and wonderful planets beyond our solar system