Before -1990, our view of space came from ground-based light telescopes.
From telescopes on Earth, scientists have known about water on Mars for more than 30 years.
The system produces images that are nearly equivalent to those obtained from space-based telescopes.
There were a number of live online video streams with footage from telescopes around the world.
In a period of three days, Eros gradually disappeared from telescopes.
Neptune now has eight known moons, two of which were discovered from Earth-based telescopes.
The central point is, you must take the light from different telescopes and combine it together.
From ground-based telescopes, the two galaxies look like a single blob.
These were long-range, taken from telescopes on the Jenkins and on satellites.
Follow-up observations from ground-based telescopes also are needed to confirm the discoveries.
