Name_____________________________________________________Module xx Lecture and xxxxx GuideWhat is the definition of xxx Universe? xxx xxxx is xx existence xxxx as physical xxxxxxx stars, galaxies xxx planets.What are galaxies and xxx many xxx xxxxxx xxxxxxxx xxx sprawling space xxxxxxx xxxxxxxx xx xxxx ,gases xxx xxxxxxxxx xxxxxx Galaxies are xxxxxxxxx xx xx over xxx billion in xxxxxxxWhat xx a light xxxx xxx xxxx xx xxx xxxxx of xxxxxx A xxxxx xxxx xx the xxxxxxxx xxxxxxxxx by light xx one year. xxx xxxxx travels xx xxxxx xx 300000 kilometers per xxxxxxxxxxx are xxx 2 xxxx components of stars? Helium and xxxxxxxxxxx many stars are xx a xxxxxxx A xxxxxx xxx a million stars.xxx do stars produce xxxxxxx xx xxxxxxx fusion.What is x xxxxx xxxxxx xxx xxxx xxx the xxxxxxx xx contains? Solar xxxxxx refers xx xxx xxx and xxx xxxxxxx xxxx revolve around it. It consists xx the sun x the xxxxxx moons, planets, asteroids, comets and xxxxxxxxxxxxxxx xx the name of our galaxy?