Patterns of stars in the sky are called
What are some of the parts of the electromagnetic spectrum?
radio waves, sound waves, infrared rays
A neutron star that produces pulses of radio waves is called a
The earliest stage of a star's "life" is called a
the Hertzsprung-Russell diagram graphs stars'
brightness and temperature
How long a star lives depends on
Parallax can't be used on a star if the star is too
A light-year is a unit of
The distance between the crest of one wave of electromagnetic radiation and the crest of the next on is its
When a star runs out of fuel, it cannot become a
A star system in which one star blocks the light from another is called
an eclipsing binary
A device used to detect radio waves from objects in space is called
a radio telescope
the type of light humans can see
the length of a star's life is determined by its
A giant cloud of gas and dust in the galaxy is called a
When is a star born?
when nuclear fusion begins inside a protostar
A quasar is a type of
A star system containing two stars
A star's brightness as seen from Earth
What color are stars are the hottest stars?
Know how to read a Hertzsprung-Russell diagram.
see book p. 109
(astronomy) the magnitude that a star would have if it were viewed from a distance of 10 parsecs (32.62 light years) from the earth
the brightness of a star when viewed from Earth
What are the three main types of galaxies? Compare and Contrast
spiral (have arms that spin outward), elliptical (flattened balls) have only old stars, irregular (don't have regular shapes)
How does a neutron star form?
its a tiny star that remains after a supernova explosion
What determines whether a star will form a black hole when it dies?
It has to be a very big star
What is a supernova?
a giant star that exploded
How does a star's life begin?
A star is born when the contracting gas and dust become so hot that nuclear fusion starts.
When a star runs out of fuel, what two types of stars can it become?
white drawf or neutron star
What happens to small and medium stars when they run out of fuel?
becomes a white dwarf