Our Solar System, Galaxy and Universe

Planets closer/nearer the Sun orbit __________ than those further out.

Most meteoroids are believe to have once been part of

Distinguish between a solar system and a galaxy

During a total solar eclipse the sun's outer atmosphere, or ____________, is visible.

Which of the following is true about an irregular galaxy?

When Earth passes through the orbit of an old, broken up comet, we experience

A comet's tail always points:

Impact craters are caused by ____________

What type of galaxy is the Milky Way?

Streams of electrically charged particles that travel from the sun at high speeds are known as 

Most meteoroids that enter Earth's atmosphere never reach the ground because

The energy-producing reaction that takes place in the Sun's core is

What unit is used to measure the distance between stars?

Galaxies are sorted into different categories according to their

Large solar eruptions that occur near sunspots are

The Sun's gravitational attraction along with the planets ______ keeps the planets in orbit

Galaxies exist in large groups held together by gravity called

What is the name of the area between Mars and Jupiter?

Which of the following statements best describes the Sun?

The moon has many more craters on its surface than Earth because

Suppose that a star is 4.2 light years from EarthHow long does it take for the light to travel?

Most comets travel around the sun ____________

The sun appears larger than other visible stars because it is _______ than they are

Most asteroids are located

Regions of the Sun that are cooler than the rest of the photosphere are known as