People who have been to space say there is not much to see.
You will not find anything colorful even if you used a
telescope. Many heavenly bodies emit lights beyond the
wavelengths we can see. Those that do not are almost always red
and blue, which remain the two most common colors in the
universe.
Almost every photo you have seen of space or some other pictures
of planets and comets or exploding stars is fake. However, the
photos are real; it is the color that is fake.
Cameras aboard
spacecraft take images using filters that isolate different
wavelengths on the electromagnetic spectrum. Some, like red and
blue, capture light the human eye can see. Others like
ultraviolet and infrared, capture light it cannot see. All the
images arrive to Earth as black-and-white frames, and then are
assigned colors digitally and compiled into a composite.
NASA releases images
that are 'false color', because it shows something interesting
about the atmosphere and allows us see lights that would have
been invisible to us. Not many would be interested in space if
all they ever saw were black and white or blue and red photos. Incidentally,
the sun is pure white. Photographs of the Moon, taken from
space show the gray color from the surface of the Moon which
is mostly oxygen, silicon, magnesium, iron, calcium and
aluminum.
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