"What does Hubble’s infrared vision help astronomers see?"
Infrared is an important wavelength for astronomers because of several reasons.
The expansion of the universe to see farther back,
looking through dust clouds and looking at cooler objects like planets.
"Saturn - Visible"
"Saturn - Infrared"
"Jupiter - Visible"
"Jupiter - Infrared"
We can see into dust clouds the way that infrared does it the longer wavelengths
of light actually can go bending around the obstacles like dust grains.
So we see around the dust grains and able to see inside those
opaque clouds to see what's happening like in the Orion Nebula and the Eagle Nebula.
Infrared is important, also when we want to see the most distant galaxies
they appear to be running away from us at immense speeds because of the expansion of the universe.
The light that we receive from those distant galaxies had been stretched
along with the expansion of the universe so that it is much longer wavelengths, which means it started
off with visible light and it's now infrared. So if you want to see those first galaxies
you need an infrared telescope to pick up the light that started out as visible wavelengths.
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