Definitions
A natural object which is located outside of Earth's atmosphere.
What is a Celestial Object?
An enormous ball of extremely hot, ionized gas that shines under its own power.
What is a star?
The distance that light can travel in one year.
What is a light year?
Jupiter, Saturn, Uranus, and Neptune
What are the gas giants?
Small rocky objects that orbit the sun and are smaller than planets.
What are Asteroids?
A Celestial Object made of frozen gases, ice, and dust.
What is a Comet?
This force holds the cloud of gas together.
These two celestial objects are about 1.3 light minutes away from each other.
What are the Earth and the Moon?
The only two planets in our solar system without moons.
What are Mercury and Venus?
Any rock that enters the atmosphere of Earth.
What is a Meteor?
This celestial object must orbit a star, it must be big enough to have enough gravity to force a spherical shape, and it must be big enough that its gravity cleared away any objects of a similar size near its orbit.
What is a planet?
Eris, Haumea, Makemake, for example.
What are the Dwarf Planets?
A rock from space that hits the ground.
What is a Meteorite?
This process happens in stars to form Hydrogen gas into Helium gas.
What is Nuclear Fusion?
The distance from the Earth to the Sun, approximately 150 million kilometers.
What is an astronomical unit (AU)?
This planet rotates in a retrograde direction.
What is Venus?
These celestial objects are often called shooting stars.
What are Meteors?
This star is the 2nd closest star to us.
What is Proxima Centari (Alpha Centari)?
This planet takes 163 Earth years to orbit around the Sun once!
What is Neptune?
Phobos and Demos.
What are the moons of Mars?