What did Galileo observe with his telescope?

Galileo sparked the birth of modern astronomy with his observations of the Moon, phases of Venus, moons around Jupiter, sunspots, and the news that seemingly countless individual stars make up the Milky Way Galaxy.

Are Galileo telescopes any good?

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What changes did Galileo make to the telescope?

Between the summer 1609 and the beginning of January 1610, Galileo increased the magnification of his telescope by a factor of 21. He also introduced a number of modifications, such as the ability to control its aperture, that helped to reduce optical aberrations.

Why is Galileo’s telescope important?

Galileo invented many mechanical devices other than the pump, such as the hydrostatic balance. But perhaps his most famous invention was the telescope. With this telescope, he was able to look at the moon, discover the four satellites of Jupiter, observe a supernova, verify the phases of Venus, and discover sunspots.

What did Galileo see with his telescope quizlet?

Using a very basic telescope, Galileo was able to identify 4 large moons orbiting Jupiter; Io, Europa, Ganymede, Callisto. It was later discovered that there are actually more than 60. Galileo observed the phases of Venus as it went around the Sun. This further proved Copernicus’ belief of a heliocentric solar system.

How did Galileo get the idea of a telescope?

His telescope had a concave eyepiece aligned with a convex objective lens. One story goes that he got the idea for his design after observing two children in his shop holding up two lenses that made a distant weather vane appear close.

How does a Galilean telescope work?

In Galileo’s version, light entering the far end (1) passed through a convex lens (2), which bent the light rays until they came into focus at the focal point (f). The eyepiece (3) then spread out (magnified) the light so that it covered a large portion the viewer’s retina and thus made the image appear larger.

Why was Galileo’s telescope so important for his work quizlet?

Galileo did not invent the telescope, but he was the first person to use this new invention to study the sky. With his telescope, he was able to discover several features in the sky that could not be seen with the naked eye. Refraction is the bending of light as it passes into another material of different density.

Did Galileo observe Neptune?

We have found that Galileo observed the planet Neptune on 28 December 1612 and 28 January 1613. The latter observation may be of astrometric value, and differs by 1 arc min from the predicted position of Neptune. Galileo also detected the motion of Neptune.