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One characteristic of the terrestrial planets is their extensive moon systems.

In general, the ___________ lunar craters sit atop the mare.

While __________ gas is the main atmospheric component of both Mars and Venus, its density means it plays a far larger role in heating Venus.

Before it arrived in orbit about Eros, the NEAR spacecraft visited

The scarps on Mercury were probably caused by

Seismic P-waves can travel through both solid and liquid materials.

How does Mercury’s rotation relate to the Sun?

The Moon keeps one side facing the Earth because it doesn’t rotate on its axis.

The surface temperature of Venus is 730K, even hotter than Mercury.

The age dating of the solar system is done by radioactive dating of __________ .