vocab
What is a milky way?
The galaxy in which we exist
what is a star?
a sphere of mater with density and a tem. great enough to cause a nuclear at its center
What is a galaxy?
a collection of star in space?
what a elliptical galaxy
an oval-shaped galaxy
all existing matter and space
What is the sun?
a medium-size star near the edge of a disc-shaped galaxy of stars
How many star are in the milky way?
250 billion
How many star are in are galaxy?
100 thousand million stars
What is spiral galaxy?
a spiral-shaped galaxy
How big is a universe?
Unknown
What is a spectral class?
how stars are categorized
How old is are sun?
4.603 billion years
What is the name of are galaxy?
milky way
What is a irregular galaxy?
a galaxy with no distinct shape
What is the milky way?
the galaxy in which we exist
what is an luminosity/magnitude?
a star's brightness
How many star are in are solar system?
one star (are sun)
how dig is are galaxy?
100,000 light-years
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you get a free 400 points
what is orbit?
the curved path of an object around a point in space