Show:
Star Systems
Lives of Stars
Universe Scale
Small Solar System Objects
Inner/Outer Planets
100
Star systems that have two stars.
What is a binary star?
100
All stars begin their lives as part of this large cloud of gas and dust.
What is a nebula?
100
The apparent change in position of an object when you look at it from different places.
What is a parallax?
100
The region between Mars and Jupiter.
What is the asteroid belt?
100
This is a cold, blue planet that's atmosphere contains visible clouds.
What is Neptune?
200
A system in which one star blocks the light from another periodically is called an ___________ binary.
What is eclipsing?
200
A contracting cloud of gas and dust with enough mass to form a star is called this.
What is a protostar?
200
All of space and everything in it.
What is the universe?
200
This belt is beyond Neptune's orbit.
What is the Kuiper belt?
200
This planet is too cold for liquid water, but it does have water ice now and had liquid water in the past.
What is Mars?
300
This type of cluster has a loose, disorganized appearance.
What is an open cluster?
300
When a high mass star explodes it is called this.
What is a supernova?
300
This is two words and uses powers of ten to write very large or very small numbers in shorter form.
What is scientific notation?
300
The cloud of gas and dust forming the outer layer of a comet.
What is a coma?
300
The axis of rotation for this planet is tilted at an angle of about 90 degrees from the vertical.
What is Uranus?
400
The Milky Way is this type of galaxy.
What is a spiral galaxy?
400
This is an object with gravity so strong that nothing, not even light can escape.
What is a black hole?
400
Astronomers often use parallax to measure the ________ to nearby stars.
What is distance?
400
The solid inner core of a comet.
What is the nucleus?
400
Venus traps heat by the atmosphere in what is known as the ___________ effect.
What is greenhouse?
500
These are active young galaxies with huge black holes at their centers.
What are quasars?
500
A rapidly spinning star.
What are pulsars?
500
Scientists use a unit called the ______-______ to measure distances between stars.
What is the light-year?
500
An object slightly smaller than Pluto that orbits the sun beyond Neptune and is spherical. Two words
What is a dwarf planet?
500
This planet has virtually no atmosphere.
What is Mercury?