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Your Guide to NASA’s James Webb Space… – The Planetary Society

Webb will see galaxies that formed just after the Big Bang and help determine whether planets orbiting other stars could support life.

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How Webb sees back in time
The farther away objects are, the longer it takes their light to
reach us, meaning when we look at a distant galaxy, we are actually
seeing what that galaxy looked like in the past. When you look at the
Moon, you are seeing it as it existed 1 second ago. The sunlight warming
your face on a beautiful day is 8 minutes old. The Andromeda Galaxy,
which looks like a smudge of light through binoculars, is actually 2.5 million years older than it appears now!
Hubble ca…

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