Big Bang Theory Orbits Stars Relationships Potpourri
100
What is a galaxy
A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
100
What is an ellipse
Planets orbit the sun in an orbit of this shape.
100
What is a nebula
A cloud of gas and dust that is the beginning of a star.
100
What is decreases.
As distance increases, gravitational force does this.
100
What is hydrogen
The most abundant element found in main sequence stars.
200
What is a redshift
A decrease in frequency due to movement away from an observer.
200
What is zero
The eccentricity of a perfect circle.
200
What is the core
Where fusion occurs in main sequence stars.
200
What is directly proportional
Mass and gravity have this type of relationship
200
What is increases
As the velocity of a planet/satellite's orbit increases, this happens to its orbital period.
300
What is open, closed, and flat
The three possible fates of the universe.
300
What is mass and distance
The two things that gravity depends on.
300
What is a supernova
An explosion that occurs at the end of a massive star's life-cycle.
300
What is decreases
As the wavelength of light from a star increases, its frequency does this.
300
What is aphelion.
The position on a planet's elliptical orbit where it is moving the slowest.
400
What is a blueshift
A decrease in wavelength due to movement toward an observer.
400
What is one year
The orbital period of the Earth.
400
What is a red giant
What the sun will become when it is done fusing hydrogen in its core.
400
What is increases
For stars on the main sequence, as the star gets hotter, its brightness does this.
400
What is it will continue to expand forever
If the fate of the universe is an open universe, this will happen.
500
What is redshifted galaxies and cosmic background radiation
Two pieces of evidence for the big bang theory.
500
What is the perihelion
The point in an elliptical orbit where the planet is moving the fastest.
500
What is white dwarf
The type of star that the sun will be at the END of its life-cycle.
500
What is smaller.
Compared to a less massive planet orbiting a star, a more massive planet orbiting the same star's major axis will be this.
500
What is c/a.
How eccentricity is calculated.






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