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Yes, there are some quasars that are nearly 13 billion light years from the earth.
12.8 billion light years away.
Quasars can be very, very, very far away. And they are extremely bright. We've seen quasars that are 12 billion light years away from Earth (a light year is how far light travels in one year, and light travels at about 128 billion kilometers a second). Most quasars are actually big, bright galaxies shining from millions, or even billions of light years away from here.
Scientists use radio waves to study distant quasars because quasars emit large amounts of radio waves but not much visible light.
Light and radio waves.
light and radio waves
Of course it is.
starlight
Starlight
The electro magnetic spectrum - A prism can split light into a spectrum of colors, and starlight is light. Detail your question and you will have a detailed answer, if this answer does not do the job
Yes, quasars are the most luminous objects in the universe.
The light from quasars - all quasars - is shifted far to the red side of the spectrum. This means that they are moving away from us, at a very high rate of speed. They cannot be "nearby", for that, and a lot of other sound, scientific reasons.