Astronomy Flashcards
what is redshift
when an object is moving away from you & the wavelength becomes longer appearing red.
what is blueshift
when an object is moving towards you and wavelength is shorter, appearing blue.
what is a spring tide
has the greatest difference between high and low tides
what is nuclear fusion
when lighter elements combine to form heavier ones
what is the main sequence
the stage where a star is rapidly fusing hydrogen atoms into helium
what is a stellar nebula
the birthing place of stars / beginning of a star
what is a neap tide
has the least difference between high and low tides
what is a white dwarf
an average star has used all it’s fuel, making it small and dense
what is a neutron star
the densest object in the universe
the universe is approximatley ________ years old.
14 billion
a massive star will most likely end its life as a _____ star.
neutron
what is responsible for earth’s tides
the sun and moon
what is causing the universe to expand
dark energy
