A massive celestial body that produces light and heat

(a)  

The ____ _____ theory tries to explain the origins of the Universe.

(a)  

It is the capacity for doing work

(a)  

The brightness of a star is the amount of (a)   that we can see from Earth

Groups of stars that form patterns in the sky

(a)  

A half of the Earth

(a)  

Our galaxy is called the...

(a)  

It is made up of the Sun, the planets and other celestial bodies.

(a)  

The inner planets (Mercury, Venus, Earth and Mars) are mostly made of...

(a)  

The outer planets (Jupiter, Saturn, Uranus, Neptune) are mostly made of...

(a)  

It is a force that attracts a body towars any other physical body

(a)  

The Earth continually rotates on its...

(a)  

A line that divides the Earth into day and night

(a)  

Name this movement

(a)  

Rotation takes (a)   hours

This movement is called...

(a)  

The Earth needs approximately (a)   days to revolve around the Sun.