Today's Rocket Words: Your 5 words and meanings to learn
diameter
The straight line from one side of an object to the other.
tide
The alternate rising and falling of the sea due to the attraction of the Moon.
eclipse
When one celestial body stops light from reaching another celestial body.
gravitational pull
Something all objects create which attracts other bodies towards them.
mean orbit velocity
The speed which a body travels around another body.