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Life Cycle
Galaxies
Formation of the Universe
Miscellaneous
100
A star's color indicates its this.
What is temperature?
100
Stars begin as this, which is the name for a cloud of dust and gas.
What is a stellar nursery?
100
Scientists believe that the Milky Way is this type of galaxy.
What is a spiral galaxy?
100
Scientists think that the universe will continue to do this forever.
What is expand?
100
A star's apparent shift in location is called this.
What is parallax?
200
The H-R diagram shows the relationship between a star's surface temperature and its this.
What is absolute magnitude?
200
This type of star has used up all of its hydrogen and is the leftover center of an old star.
What is a white dwarf?
200
This is the word that Hubble used as proof that the universe is expanding.
What is redshift?
200
According to the Big Bang Theory, this filled the universe after the original explosion.
What is cosmic background radiation?
200
This is the force that holds galaxies together.
What is gravity?
300
The hottest stars are this color.
What is blue?
300
These two objects are formed from the materials in the core of a supernova.
What are neutron stars and black holes?
300
These objects are found along the spiral disks of galaxies.
What are open clusters?
300
The study of the origin, structure, and future of the universe is called this.
What is cosmology?
300
A star's spectrum contains black lines called these.
What are emission lines?
400
This is what we see when viewing starlight through a prism, since certain colors of light are absorbed by a star's atmosphere.
What is an absorption spectrum?
400
This is the symbol that precedes magnitudes of the brightest stars.
What is a negative sign?
400
These objects are found in the spherical halo of spiral galaxies and near elliptical galaxies.
What are globular clusters?
400
This is a bright spot of light that is very far away and is one of the most powerful energy sources in the universe.
What is a quasar?
400
This is the tool scientists can use to learn about a star's temperature and composition.
What is a spectrograph?
500
The patterns of lines in a star's absorption spectrum represent these.
What are elements?
500
The sun's this is -26.8.
What is apparent magnitude?
500
Very few new stars form in this type of galaxy, because there is little free-flowing gas.
What is an elliptical galaxy?
500
An object that is so massive and dense that not even light can escape it is called this.
What is a black hole?
500
A cool star that has lost its hydrogen is called this.
What is a red giant?