Answer :
-- A galaxy is a collection of a huge number of stars ... possibly hundreds
of billions of stars in a galaxy.
-- If a star has planets in orbit around it, then the star and its planets make up
one solar system.
-- There could be hundreds of billions of solar systems in one galaxy.
of billions of stars in a galaxy.
-- If a star has planets in orbit around it, then the star and its planets make up
one solar system.
-- There could be hundreds of billions of solar systems in one galaxy.
