H-R Diagram
What is the main sequence?
The region most stars spend time on.
What is a galaxy?
A large group of stars bound together by gravity.
What do bigger stars have?
More gravity and pressure.
What are sunspots?
Darker areas on the surface.
What is luminosity?
How much light a star is giving off and depends on size and temperature.
What are the two things graphed on the diagram?
Temperature and brightness.
How many types of galaxies are there?
There are three types.
What does the light of the star depend on?
The elements that are in them.
What is the last visible layer of the sun?
The photosphere.
What are solar prominences?
When plasma flows along the loop of the magnetic field.
What color are the coldest stars on the diagram?
Red.
What is a spiral galaxy?
Middle bulge with arms.
What do all stars start off as?
A nebula which is a cloud of dust and gas.
What is the first layer of the sun that produces energy?
The core.
What is a solar flare?
When the magnetic field loop snaps and causes a violent explosion.
What color are the hottest stars on the diagram?
Blue.
What is an elliptical galaxy?
Oval-shaped with old stars.
What do low-mass stars turn into?
White dwarfs and then after black dwarfs.
What are the inner layers of the sun?
The core, radiative zone, and the convection zone.
What is apparent magnitude?
How bright a star looks from Earth.
What are the other types of stars on the diagram?
Supergiants, giants, and white dwarfs.
What is an irregular galaxy?
Leftovers and has no shape.
What do high mass stars turn into?
A neutron star or a black hole.
What are the outer layers of the sun?
The photosphere, chromosphere, transition region, and the corona.
What is absolute magnitude?
How bright a star is compared to other stars.