Solar System and Space Travel

What  word describes a planet spinning on an axis?

What object glows as it enters the Earth's atmosphere?

What was the first man made (artificial) satellite?

What controls the movement of the solar system?

The first successful United States manned spacecraft.

What spacecraft is orbiting the Earth right now?

What gas is the sun mostly composed of?

Which object in our solar system has the greatest gravity?

The shape of a comet's orbit is

What is the force of attraction that occurs between the sun and planets in our solar system?

Thermal tiles on Space Shuttle protect it from burning up as it returns to Earth. Why?

What causes a comet's tail to "glow"?

Which planets have more moons due to their large size?

The Sun orbits Earth and the moon orbits the Earth

A smaller system within our larger solar system is

The moon orbits the Earth and the Earth orbits the Sun.

It takes 1 year to complete an orbit of the Earth around the Sun.  What is this called?

The moon orbits the Sun as the Earth orbits the moon.