Universe, Solar System, Planets

Order these from largest to smallest.  

A star is 500 light years away, how long does it take light from that start to reach Earth?

A planet spinning on its axis and it causes day and night?

Copernicus challenged the old model of the universe. How did he describe the motion of the sun?

A model of the solar system where the sun is the center.

A star has several smaller bodies orbiting it.  What is the term for all of these together?

What are two characteristics of the inner planets? 

Another star has similar size and temperature to our sun.  What can you conclude?

Which space journey would take the longest?

Which model of the solar system does the sun revolve around the Earth?

________________ is considered a dwarf planet. 

What is the invisible path that planets move around called? 

Galileo showed that the Earth was not the center of our solar system.  How did he do this?

How do the temperatures of the planets change as you get further from the sun?

Compared to planets, these objects would be MUCH smaller.

The sun produces heat and energy through nuclear fusion.  What happens during fusion?

How many planets are in our solar system?

What separates the inner and outer planets?

Which object does the Earth revolve (orbit) around?

Terrestrial (rocky) planets densities range from 3.5 to 5.5.  What are these planets made of?

What is the term for minor sized planets that orbit the sun in a flat belt beyond Neptune?

Kepler calculated the motion of the planets. How do planets move in the solar system?

What is the center of the solar system?

How long does it take the Earth to revolve around the sun?

A collection of billions of stars is called......

What force of nature causes the gas giants to have more moons than the smaller rocky planets?

Gas giant densities range from 0.5 to 1.6 g/cm3.  What are these planets made of?