The Sun
How many regions are there of the sun?
Four
The process by which two or more small nuclei fuse to make a bigger nucleus is called this.
Nuclear fusion
The principle tool that scientist use to study the universe is called this.
Telescope
The two main types of variable stars are called what?
Pulsating Variables and Novas
A large ensemble of stars, all interacting through the gravitational force and orbiting around a common center is what?
Galaxy
The core, the radiative zone, the convection zone, and the photosphere are the regions of what?
The sun
The process by which a large nucleus is split into smaller nuclei is called this.
Nuclear fission
This attribute of a star is what scientist use to determine which spectral letter the star gets.
Temperature
This is the term for the extreme example of a nova.
Supernova
All the stars that can be seen from earth with the naked eye (including the sun) belong to the same galaxy known as this.
Milky Way
The majority of the sun is this gas.
Hydrogen Gas
Define Critical Mass
The amount of isotope necessary to sustain a chain reaction.
The brightness of a star, corrected for distance, on a scale of -8 to +19 is called this.
Absolute magnitude
This is the name of a very well-studied class of pulsating stars that are usually between five and 20 times as massive as the sun.
Cepheid Variable class
The center of the nucleus is called what?
Nucleus
The only part of the sun that we actually see is this.
The photosphere
What happened at the Chernobyl nuclear power plant in the former Soviet Union in 1986.
Meltdown
The brightness of a star as seen in the night sky is called this.
Apparent Magnitude
Two stars that are close enough to one other to orbit one another is called what?
Binary Stars
What are the three classifications of a galaxy?
Spiral Galaxy, Lenticular Galaxy, and the Elliptical Galaxy
This region of the sun has the lowest temperature.
The photosphere
Why don't we use nuclear fusion to make electricty?
We have not mastered the process yet.
Are red giants cooler or warmer than most white dwarfs?
Cooler
When one star obstructs our view of the second star it is called what?
Eclipsing Binary Stars
What does Psalm 19:1 say?
The heavens are telling of the glory of God; and their expanse is declaring the work of His hands."