Sun
Sunspots
This type of galaxy resembles a football at times
Elliptical
When a star's temperature increases,...
Its brightness increases
An object in space that lets no light escape it due to extreme gravity:
Black Hole
A dead star that is cool and completely dim:
Black Dwarf
The outermost layer of the sun:
Corona
A pinwheel shaped galaxy like the Milky Way...
Spiral
A star's brightness is directly related to its:
Temperature
A star system consisting of two stars orbiting around their common center:
Binary
The brightness of an object as it appears from Earth
Apparent Magnitude
What is the layer above the core?
Radiative Zone
Smaller galaxies with a random shape...
Irregular
Our sun, along with 90% of other stars, fall into this category:
Main Sequence
What is the earliest form of a star?
Protostar
An enormous explosion of a giant star:
Supernova
What reaction takes place in the core?
Nuclear Fusion
Distant galaxies that resemble stars, having huge black holes at their centers and glowing brightly
Quasar
Colors of stars from hottest to coolest
Blue, white, yellow, orange, red
What element are stars mainly composed of?
Hydrogen
Large clouds of gas and dust in space:
Nebula
Loops of gas from sunspot to sunspot
Prominences
At 2.2 million light years away, it is our closest neighboring galaxy:
Andromeda
These are the largest stars on the HR Diagram
Supergiants
How old is our Sun?
About 4.6 Billion years old
The factor that determines how long a star will live:
Its mass