Theoretically as far as infinity, it all depends on what one wants to observe. It also depends on how much distortion there is - atmosphere etc.
However, if a mountain is 50 feet from you and it is pitch black, then you cannot see it. If it is day light, then you can see it. Yet if that same mountain is a thousand miles away you may see it as a "feature" of the horizon.
The same with the universe. Some objects are so far away that there is "nothing" to "see" even if they exist.
If there was a star with a luminosity of 500 trillion times that of our Sun located 90 billion light years from Earth then there is a good chance we could observe it. If that same Sun had a luminosity of our own Sun then there is no chance we could observe it.
"See" relies on the ability to observe, based on luminosity and distance.
People commonly look through telescopes to see into space. Telescopes are used by NASA to see stars and planets very far away, and less sophisticated models are used to see planets in our solar system, or even the moon.
Radio telescopes can detect radio waves from celestial objects billions of light-years away, allowing scientists to observe phenomena such as quasars, pulsars, and the cosmic microwave background radiation. The distance at which a radio telescope can "see" depends on the strength of the signal emitted by the object being observed and the sensitivity of the telescope's receivers.
reflecting and refracting telescopes
The moon is about 0.0000000406 light years away from earth. Clearly, the moon is MUCH too close (238,000 or 239,000 miles or so) for the distance to be rendered meaningfully in light years.
they help you see
Telescopes are used to see things that are far away from earth. Using telescopes we can see things that are millions of miles away. Most of the telescopes are on Earth but some of them are in space such as the Hubble Space Telescope.
microscopes can see thing close up and telescopes your can see thing far away
with your eyes and boobnoculars and telescopes.
It probably does, but it is too far away for our telescopes to see that level of detail.
The same reason you want them on earth. To see stuff too far away to see clearly with a pair of reading glasses.
well if you ever watched a pirate movie they use telescopes
People commonly look through telescopes to see into space. Telescopes are used by NASA to see stars and planets very far away, and less sophisticated models are used to see planets in our solar system, or even the moon.
Because the cars that go along will see from 20 miles away if it was 69 miles away that would mean you can see the statue of liberty
Scotland is a country with an area of over 30,000 square miles therefore it is difficult to answer this question - see below. Gretna is 314 miles away. Edinburgh is 379 miles away. Inverness is 558 miles away. Stornoway is 693 miles away. Kirkwall is 697 miles away. Yell is 859 miles away.
It depends on what the article is! You can see the sun, which is more than 90 million miles away, and stars and galaxies which are at much greater distances.
because they are suns millions of miles away
Radio telescopes can detect radio waves from celestial objects billions of light-years away, allowing scientists to observe phenomena such as quasars, pulsars, and the cosmic microwave background radiation. The distance at which a radio telescope can "see" depends on the strength of the signal emitted by the object being observed and the sensitivity of the telescope's receivers.