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The Galilean telescope was innovative in that he was the first to expand the range of magnification of the new spyglasses beyond 3X, using his particular set of lenses. In Sidereus Nuncius, Galileo described how these two lenses served to magnify an object.
"When there are no glasses in the tube, the rays proceed to the object FG along the straight lines ECF and EDG, but with the glasses put in they proceed along the refracted lines ECH and EDI. They are indeed squeezed together and where before, free, they were directed to the object FG, now they only grasp the part HI" Galileo, Sidereus Nuncius tr. Albert Van Helden, pp. 38-39.
Actually, Galileo could not explain how his telescope magnified precisely. He did not understand, as we now know, that the magnification of his telescope can be computed by F/f (see top figure). Increasing the magnification requires lengthening the telescope. Our 10X telescope is about 4 feet long.
From the above picture, you can see that an image, HI, will be viewed upright, making the Galilean telescope useful for terrestrial purposes as well as astronomical. Keplerian telescopes, in contrast, invert the image.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agohe made one the first one
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What is the difference between an astronomical telescope and a Galilean telescope?
A Galilean Telescope is also an Astronomical Telescope so it is just a subset of Astronomical Telescopes.
What is length of galilean telescope?
Galileo's telescope was about 92.7 centimeters long. 36.5 inches long.
What did gallillao discover by using his telescope?
hediscovered the four moons of Jupiter, (soon named the Galilean moons).
What tool did Galileo use to discover things about space?
In his early career: No telescopes. A log to track planets. Sea-faring devices such as the sextant Later in life: In 1609 Galileo started using the telescope on the 'heavens' Kepler used the Galilean telescope until 1611 he re-invented the refracting telescope (now known as the Keplerian telescope)
What 4 things did Galileo first see when he looked in a telescope?
Galileo looked at the planet Jupiter and observed its 4 largest moons (which are still known as the Galilean moons, to this day).
What is the difference between an astronomical telescope and a Galilean telescope?
A Galilean Telescope is also an Astronomical Telescope so it is just a subset of Astronomical Telescopes.
What is length of galilean telescope?
Galileo's telescope was about 92.7 centimeters long. 36.5 inches long.
Why were galilean moons the first objects to be seen with a telescope?
It was the first thing to be seen because that's how it was.
What did gallillao discover by using his telescope?
hediscovered the four moons of Jupiter, (soon named the Galilean moons).
Which planet has the Galilean moons orbiting around it?
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.
Who Improved the telescope and observed Jupiter's moons?
Galileo was the first to look at the planet Jupiter through a telescope, and to observe the moons of Jupiter (the 4 largest moons are still known as the Galilean moons).
What is so significant about the galilean moons?
They're fairly big for moons, although Jupiter itself is big. The four "Galilean" moons of Jupiter were the first "moons" other than our own Moon to be seen, by Galileo using his new telescope.
Was Galileo's telescope a reflector.?
No: Galileo's telescope was a Galilean refractor, which is to say it has a single large object lens at the top end and a concave eye lens at the other end. This is not a popular type of telescope now because it has a small field of view, and it is only used for cheap telescopes and opera glasses.
Why were the Galilean moons the first objects to be discovered with a telescope?
The first telescope to be trained at the sky in about 1610 only had an aperture of about 25 mm. Beside Venus, the Moon and Jupiter there wasn't much that COULD be seen. The optical quality couldn't be very great. To see the four brightest (Galilean) moons of Jupiter was really a feat. Even Saturn came in so poorly that the rings were mistaken for jug handles!
What tool did Galileo use to discover things about space?
In his early career: No telescopes. A log to track planets. Sea-faring devices such as the sextant Later in life: In 1609 Galileo started using the telescope on the 'heavens' Kepler used the Galilean telescope until 1611 he re-invented the refracting telescope (now known as the Keplerian telescope)
What 4 things did Galileo first see when he looked in a telescope?
Galileo looked at the planet Jupiter and observed its 4 largest moons (which are still known as the Galilean moons, to this day).
Where would you find the Galilean moons?
The Galilean moons are the four largest moons orbiting the planet Jupiter; they are named for their discoverer, Galileo.They are (in order from closet to furthest from Jupiter) Io, Europa, Ganymede and Callisto; with just about any telescope, you can see at least a few of them for yourself whenever Jupiter is visible in the nighttime sky.
