Astronomy questions help??

Question

1.what did Galileo do that no astronomer before him had ever done?

2. what discovery did Galileo make about jupiter, and why was it so important ?

3. identify briefly four fundamental astronomical discoveries made by Galileo in 1609 and 1610. other than that previous question?

4. was galileo a geocentric astronomer, or a heliocentric one?justify your answer?

Answer 1

1.Galileo made a telescope that he used it for celstial viewing.

2.Jupiter has four orbiting moons and this is important,because this made a proof that Earth is not at the center of our Solar System.

3.He discovered Jupiter,Phases of Venus,Rings of Saturn,Uranus(he didnt know it was a planet),Craters of the Moon,Double Stars and more.

4.He was a heliocentric one,because he believe that the Sun is the center of our Solar System.

Answer 2

1. Saw the moons of Jupiter.

2. The moons of Jupiter, proving that at least some objects in the sky did not move around the Earth (jeopardizing the then-accepted geocentric model of the universe)

3. Phases of Venus, sunspots, mountains and plains on the moon, the rings of Saturn.

4. Heliocentric - I'll let you do at least a little of your own homework by coming up with justification.  You need to do at least some reading for yourself.

Answer 3

1 - Galileo did what apparently no one else had ever done with a spyglass before -  train the instrument on the heavens.(The inventor of the astronomical telescope )

2 - Discovery of four moons orbiting Jupiter.To Galileo, the moons proved that not everything in space circled the Earth, and therefore our planet was not the absolute center of the universe, as the Church maintained the Bible had it.

3 - He was the first to see sunspots

He saw Venus going through phases, thus proving it was orbiting the Sun.

He discovered that freely falling bodies, heavy or light, have the same, constant acceleration and that this acceleration is due to gravity.

He also determined that a body moving on a perfectly smooth horizontal surface would neither speed up nor slow down

4 - Heliocentric - he was exposed to a new theory, proposed by Nicolaus Copernicus, that the Earth and all the other planets revolved around the sun. Galileo's observations with his new telescope convinced him of the truth of Copernicus's sun-centered or heliocentric theory.

Galileo's support for the heliocentric theory got him into trouble with the Roman Catholic Church. In 1633 the Inquisition convicted him of heresy