A body of gases that gives off a tremendous amount of radiant energy in the form of light and heat
What is a star?
100
The brightness of a star without taking into consideration the distance of the star; brightness as seen from earth.
What is apparent magnitude?
100
The star cycle of a star depends on this property.
What is stellar mass?
100
The end of a low mass star cycle will result in this white dwarf explosion.
What is nova?
100
The second brightest star in a constellation has this prefix.
What is beta-?
200
In the classification of stars, the surface temperature of the star is directly related to this visible characteristic.
What is color?
200
The true brightness of a star, if all stars were lined up at an equal distance (32.6 light-years away).
What is absolute magnitude?
200
A new star that forms in a nebula cloud of dust and gas.
What is a protostar?
200
One of two possible outcomes for a high mass star, this is a hole in space with a gravity so great that not even light can escape, formed by the collapse of a very large supernova.
What is a black hole?
200
The three main types of galaxies.
What are spiral, elliptical, and irregular galaxies?
300
This type of motion is due to the movement of the earth.
What is apparent motion?
300
This diagram plots the surface temperatures of stars against their absolute magnitudes.
What is the Hertzsprung-Russel diagram (H-R diagram)?
300
When extremely high temperature and pressure cause less massive atomic nuclei to combine to form more massive nuclei, releasing enormous amounts of energy. Elements combine with heavier and heavier atoms: Hydrogen to Helium, Helium to Carbon, etc.
What is nuclear fusion?
300
In a high-mass star, after a supernova, the core may contract into this very small, but incredibly dense star. One spoonful = 100 million tons
What is a neutron star?
300
The theory saying the universe was created from concentrated matter and energy.
What is the big bang theory?
400
The apparent shift in the wavelength of light emitted by a light source moving toward or away form an observer.
What is the Doppler Effect?
400
The main band where most stars are located in the H-R diagram.
What is the main-sequence?
400
It is during this second and longest stage, that the star spends 90% of its life.
What is the main-sequence?
400
Why does the temperature of a protostar increase over time?
Increased pressure.
400
Pairs of stars that revolve around each other.
What are binary stars?
500
The method of determining the distance from the earth to a star based on the shift in the apparent position of the star when view from different angles.
What is parallax?
500
On the absolute magnitude scale, which is brightest:
Star A = +15
Star B = -10
Star C = 0
Star B
500
During this stellar phase, the star's core temperature increases, causing helium to fuse to carbon, making the star expand greatly and cool.
What are giants/supergiants?
500
What causes a nova explosion?
Accumulation of gas on a white dwarf.
500
Star-like objects that give off radio waves and X-rays. Supposedly developed into galaxies.