Exam 3: The Origin of Modern Astronomy

The law of gravitation is termed universal because it is a property of all material objects.

How did the geocentric model and the heliocentric model of the universe explain retrograde motion?

Galileo used a telescope to observe the phases of Jupiter.

Which of the following statements best describes Kepler's third law of planetary motion?

When do spring tides occur?

In Ptolemy's view of the universe,what is at the centre of a planet's epicycle?

Would your mass and weight change if you went to the Moon?

Many classical Greek astronomers believed the Earth could not move because they detected no parallax.

The Copernican system was no more accurate than the Ptolemaic system in predicting the positions of the planets because of a key factor unchanged from the Ptolemaic system.What was that factor?

What is the term for a single conjecture that can be tested?

If a planet orbits the Sun at a distance of 4 AU,then its orbital period is 8 years.

-Which of the following statements is implied by Kepler's first law of planetary motion?

The Copernican model of the solar system has the planets orbiting the Sun along elliptical paths.

Copernicus was the first to propose that the Earth moved around the Sun.

A(n)____________________ is a circle,the centre of which moves in a circular orbit around the Earth.

The spring tides occur during the new and full lunar phases.

Discuss which of Galileo's observations argued against the geocentric model and which of his discoveries argued for the heliocentric model.

What was the reason for using epicycles and deferents to explain the motion of the planets in the night sky?

The orbital period of Uranus is 84 years.How far is Uranus from the Sun?

The first observations of objects in the solar system that orbited neither the Sun nor the Earth were made by ____________________.