Measuring Distance in Space
The symbol for the astronomical unit
What is AU?
The number of planets in the solar system
What is 8?
A region of rocky debris
What is an asteroid belt?
The group of three stars that orbit each other past our solar system
What is the Centauri system?
When a star explodes
What is a supernova?
The average distance for an astronomical unit
What is about 150 million km?
Things that float around in space
What are comets and tiny grains of dust and ice
Planets such as Jupiter, Saturn, Uranus, and Neptune
What is the outer solar system?
The names of the three stars that orbit each other
What is Rigil Kentaurus, Toliman, and Proxima Centauri?
A large cloud of dust and gas
What is a nebula?
The amount of astronomical units Mars is from the Sun
What is 1.52 AU?
A hot ball of plasma
What is the sun?
The two gas giant planets
What are Jupiter and Saturn?
A system with two stars
Can develop new stars
What are nebulae?
A unit that is used to measure distances that are so great that astronomical units cannot measure it
What are light years?
The process in which the nuclei of atoms fuse to form larger atoms
What is nuclear fusion?
The amount of earths Jupiter can hold inside of it
What is 1321?
The brightest star visible from Earth
What is Sirius?
The distance for all life to go extinct due to a supernova
What is 9 trillion?
The people who have seen the far side of the moon
Who are astronauts?
The farthest planet from the sun
What is Neptune?
The star is Sirius is two times the size of
What is the Sun?
The distance for Earth to be heavily affected by a supernova
What is 100 light years?