Stars
This color indicates that a star is the hottest of all stars.
What is blue?
All stars form in this "star nursery."
What is nebula?
These are patterns of stars that people have created stories about.
What are constellations?
This is the amount of galaxies in the universe.
What are billions and billions?
This is the force that holds the universe together.
What is gravity?
The one factor that determines the outcome of a star's life cycle.
What is mass?
If two planets get closer together, the gravitational force they exert on each other will do this.
What is increase?
This is the type of galaxy the Milky Way is.
What is a spiral galaxy?
Scientists conclude the universe will likely...?
What is expand forever?
A measure of the brightness of a star as it appears from Earth.
What is apparent brightness or apparent magnitude?
This stage occurs when the core of a star has fused all of its hydrogen into helium and begins to cool.
What is a red giant or a red supergiant?
This is a stellar explosion that can happen to stars with a high enough mass.
What is a supernova?
A type of galaxy with older stars.
What is an elliptical galaxy?
An explanation that states all matter and energy exploded from one point and has been expanding apart ever since.
What is the big bang theory?
There are five characteristics used to classify stars. Name three.
What is color, temperature, size, composition, and brightness
This is the stage that stars remain in the longest.
What is main sequence?
The unit used to measure the distance between stars.
What is a light year?
This is how old our universe is estimated to be
What is 13.8 billion years old?
Astronomers use spectrographs for this reason.
What is to determine what elements a star contains?
This is an object with gravity so strong that nothing, not even light, can escape. We cannot see it but as friction heats up the gas around it, X-Rays can be detected.
What is a black hole?
Most of the universe is made up of this mysterious material.
What is dark energy?
There are no pictures of the entire Milky Way because of this.
What is we are in it?
The shift that shows lengthening of wavelengths by the spectroscope, indicating that things are moving away from us.
What is red shift?