Apart from the obvious planets etc in our solar system we can also see back in time
Optical telescopes are found through out the world. They have even been taken to space as in the Hubble Telescope. The Optical telescope is the main telescope used by amateur astronomers. They are used in Gardens through out the world. Professional optical telescopes are generally placed on the very top of mountings. This is to reduce the amount of distortion caused by the atmosphere. The Keck observatory for example is at an altitude of 4.2 km atop the summit of Mauna Kea on Hawaii.
No telescope has been found on any galaxy
the largest telescope ever been put into the orbits is the Hubble space telescope
Uranus was discovered accidentally by William Herschel on a telescope in 1781. It was the first planet to be discovered using a telescope, and its existence had been previously unknown to astronomers.
The telescope has been used for over 100 years!!!
The Telescope Inventor, Hans Lippershey, was believed to have been in his 40s when he made the telescope around 1608.
The first person to look at the night sky with a telescope and record what he saw and try to make deductions from his observations was Galileo Galilei. Galileo had a difficult personality and he tried to assert that he was the only person allowed to make astronomical discoveries with a telescope, but, putting that aside, he was a serious scientist who made several important discoveries in physics.
Reflecting telescopes are far-and-away the most common. This is because the telescope can be smaller and lighter, and because lenses always absorb a little light while mirrors can be almost perfect reflectors.
Traditionally, it has been PATA (IDE), but many newer computers are using SATA DVD drives.
Earth does not need a telescope, look down.
Saturn has been known since ancient times. The first observation of Saturn using a telescope was made by Galileo in 1610.
Within the solar system the most common method of observing objects that are at a great distant from the Earth is through the use of conventional Optical Telescopes. The Kuiper Belt, the farthest observed edge of the Solar System (although not the limit of), has been viewed using the Hubble Space Telescope (HST), of Newtonian Design. The objects in this belt have both been viewed in optical wavelengths and infrared using the HST.