Leaving aside trivial discoveries like "hey, things look bigger through here", probably the first actual discovery was the discovery of the Galilean satellites of Jupiter.
amerigo as prevent the first telescope.
Galileo wasn't the first to make a telescope but he discovered the telescope at the age of 46.
The first telescope was invented (not "discovered") by Dutch spectacle-makers in the Netherlands, we believe, in around 1607. No, Galileo did not invent the telescope, but built his own after reading about one and substantially improved the design.
Hans Lipperhey, a German spectacle maker, is the original inventor for the 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.
Uranus, which was discovered by Sir William HerschelPrior to the invention of the telescope, the only known planets were Mercury, Venus, Earth, Mars, Jupiter, and Saturn.Uranus was the first planet discovered by telescope.
The planet, Uranus.
No made it first and discovered the moon
No satellite did. Pluto was discovered by Clyde Tombaugh, who found it using a ground-based telescope in 1930, long before we launched the first satellites.
the first thing discovered was life and all it's creations
lenses
Saturn was the first planet discovered to have rings. They were first observed by Galileo Galilei in 1610 through his telescope.