Galaxies are made partly of stars, which produce light. So, in that sense, yes.
Yes galaxies emit light
Hubble discovered that the nebulas were galaxies based on the powerful telescope at Mt Wilson. The second discoveries was the red shift relationship v=HD shows that the galaxies were outside our own galaxies definitely and quantitatively, using light sources in galaxies that were standard sources that could calibrate the distance.
They produce their own light.
Heat can not produce light without heating a certain object or material meaning heat by itself cannot produce light on its own.
infrared light
Cities can be seen from space.
The earth does not produce its own light but it reflects the light rays from the sun that reaches its surface.
a galaxies does not move that is why there are many stars
A luminous object can reflect light off other light sources. But it can also produce its own light.
NO it not produce its own light its only like a mirror getting light from the sune a mirror it only get light from the sun
Yes galaxies emit light
The galaxies beyond our own are millions to billions of light years away, meaning the light takes millions to billions of years to get here.
NO
they're called "lantern' fish so they pretty much do produce their own light
the light from the moon is a reflection of the light from the sun
A firefly!
Hubble discovered that the nebulas were galaxies based on the powerful telescope at Mt Wilson. The second discoveries was the red shift relationship v=HD shows that the galaxies were outside our own galaxies definitely and quantitatively, using light sources in galaxies that were standard sources that could calibrate the distance.