Mirrors,
The Hubble space telescope first had one big shaped mirror, which made the images blury so they sent up astronaughts and replaced it with 4 8.2 meter flat mirrors making the pictures more clear!
the cridit goes to Galileo who discoverded it with his won telescope which he invented.
Lady Violet made the biggest telescope, she was eighteen when she started to build it and it was completed four years later. back in the eighteenth century ( when lady violet lived) there where few tools to build it that is why it took so long for such a young woman to build it.
Galileo looked at the planet Jupiter and observed its 4 largest moons (which are still known as the Galilean moons, to this day).
Galileo discovered the four largest moons of Jupiter and that Venus showed phases like those of the moon.
The four largest satellites of Jupiter, known as the Galilean moons (Io, Europa, Ganymede, and Callisto), were discovered by Galileo Galilei in 1610. Using a telescope, Galileo observed these moons orbiting Jupiter, providing evidence against the geocentric model of the universe and supporting the heliocentric model proposed by Copernicus. This discovery revolutionized our understanding of the solar system.
reflectors
because he wanted to show the four largest moon
the cridit goes to Galileo who discoverded it with his won telescope which he invented.
He discovered that Saturn has rings and he discovered Jupiter's four largest moons.
Lady Violet made the biggest telescope, she was eighteen when she started to build it and it was completed four years later. back in the eighteenth century ( when lady violet lived) there where few tools to build it that is why it took so long for such a young woman to build it.
In Roman myths and legends, Ganymede was one of the many lovers of the chief god Jupiter. On first observing the four largest moons of Jupiter, Galileo gave the name Ganymede to the largest of them. (There are actually dozens of moons of Jupiter, but Galileo's telescope was only big enough to see the largest four.)
The four largest moons - were named as a group after Galileo because of him being the first person to obseve them through his own invention - the telescope.
Galileo looked at the planet Jupiter and observed its 4 largest moons (which are still known as the Galilean moons, to this day).
YerkesHale/PalomarHubbleGordon/Arecibo
Jupiter. The "Galilean" moons are the four largest moons, which are so large that Galileo was able to see them orbiting Jupiter even with his relatively modest telescope.
Galileo discovered the four largest moons of Jupiter and that Venus showed phases like those of the moon.
Gailileo made a telescope having about 20 power magnification, powerful enough to observe the mountains and valleys on Earth's Moon and the four largest moons of Jupiter. He did not invent the telescope, but improved the simple telescope invented by Dutch optician Hans Lippershey in 1608 by using the principles developed by Roger Bacon of England during the 13th century.