The solar system is held together by

During a SOLAR eclipse

As the moon waxes, people on Earth can seen ___________ of the illuminated portion of the sun.

Mercury is characterized by

The Great Red Spot is believed to be a giant storm in the atmosphere of

Terrestrial planets have similar

Kepler showed that the orbits of the planets are

Aristotle believed that planets orbit the

Planets may have been formed out of material orbiting the early sun through the process of

Gas giants are known for their _________ and _____________.

_________________ is credited with describing the orbits of the planets as elliptical.

According to rock dating, the solar system is approximately ________________ years old.

Models of the solar system with Earth at the center are called

Earth's tides are mainly a result of the

Name two factors that affect tides

What are asteroids?

Where are asteroids located?

What characteristics of Earth permit it to sustain life?

There are _________ planets that orbit the sun.

During a LUNAR eclipse

Which of the following is NOT an inner planet

The inner and outer planets are separated by

The moon orbits the Earth at a distance of about ________ kilometers.

The nebular model explains why the planets

The astronomer ___________________ first proposed that Earth and the other planets orbit the sun.

Other than the sun and the moon, the brightest object in the night sky is often a _________________.

The Kuiper belt is located ______________.

Models of the solar system with the sun at the center are called ______________ models.