Asteroids
Asteroids are mostly made of _________ and some __________.
Rock;metal
Meteors are made of _________.
Rock
Comets are made of __________ and _________ and are sometimes referred to as __________.
Ice and frozen gases; dirty snowballs
Stars are made mostly of ________ and ________.
hydrogen and helium
What is the name of our galaxy?
The Milky Way.
Asteroids orbit the _______.
Sun
Meteors are also known as _________ _________.
shooting stars
True or False?
Comets orbit the Sun.
True
A group of stars is called a _______________.
Constellation
What type of galaxy has arms extending out from the center?
Spiral
Asteroids "hang out" in our solar system in a place called the _______________.
Asteroid Belt
True or False?
Meteors can be as small as a grain of sand.
True
How many parts does a comet have?
four-
nucleus, coma, a tail and an ion/plasma tail
The first stage of a star life cycle is the ___________.
Protostar
How many stars are in our galaxy?
100-200 billion
There are ___________ of asteroids in the solar system.
Millions
What is also know as a "space" rock?
A Meteoroid
Scientists believe that comets come from what 2 regions in the outer solar system?
Kuiper Belt and the Oort cloud
A star that has cooled and does not give off light is in the __________ __________ stage.
Black Dwarf
What is the name of the telescope in space scientists use to study space?
Hubble
The asteroid belt is located between the planets _________ and ___________.
Mars and Jupiter.
When a meteor hits the Earth's surface it is called a ________________.
Meteorite.
The best known comet is named __________ _______.
Halley's comet
How many constellations are there?
88
Why can't 2/3 of the world's population see the Milky Way any longer when they look up at the night sky?
Light pollution