Earth
What is the imaginary, distant line where the earth and sky meet and the Sun rises and sets?
Horizon
The Sun is our closest _____.
star
The Moon reflects light from ____ ____.
the sun
Stars are made of hot ______.
gases
A large body in space made of rock and/or metal is called a(n) _________.
asteroid
What does the Earth rotate on?
Axis
Eight of these orbit the Sun.
planets
The parts of the Moon you can see on clear nights are called ________.
phases
Two stars orbiting each other are called _______ stars.
binary
A small body in space made of ice, rocks and dust is called a ______.
comet
How long is one rotation of the Earth?
23 hours, 56 minutes and 4.1 seconds
The greater the mass of an object, the greater its' _____________ force.
gravitational
A period of time during which the moon moves into the Earth's shadow is called a ______ ________.
lunar eclipse
A transparent material used to affect or bend light is called a _____.
lens
A small object in space that broke off of a comet or asteroid is called a _______.
meteor
What is the imaginary line that divides the north and south hemispheres?
Equator
A _______ _______ is when the Moon blocks the light of the Sun.
solar eclipse
What is the number of days (or weeks) it takes the Moon to orbit the Earth.
27.3 days or 4 weeks
A group of stars that forms a shape or an imaginary picture is called a ______________.
constellation
Asteroids usually stay in what part of our Solar System?
the asteroid belt
The path an object takes as it travels around another object is called its' _______.
orbit
Name seven (of eight) of the planets of the Solar System.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
What was the name of the lunar lander of the Apollo 11 mission, the first LEM to land on the Moon?
The Eagle
What is the name of the North Star?
Polaris
Who was the scientist to first use a telescope to study celestial objects?
Galileo