Solar System and Space Travel

Which object in our solar system has the greatest gravity?

A smaller system within our larger solar system is

Rocks gathered during missions to the Moon

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

Fuel to launch a spacecraft on Earth is _____________ fuel to launch same spacecraft on moon.

What gas is the sun mostly composed of?

The first United States manned spacecraft to orbit the earth was

The shape of a comet's orbit is

What  word describes a planet spinning on an axis?

What scientist discovered 4 of Jupiter's moons?

What was the first man made (artificial) satellite?

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?

What spacecraft is orbiting the Earth right now?

The Sun orbits Earth and the moon orbits the Earth

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

More spacecraft will be sent to explore ___________ in the next several decades.

What controls the movement of the solar system?

Which part of a spacecraft produce the force required to overcome the gravity of the Earth?

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

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

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

Which planets have more moons due to their large size?