SPACE STUDY GUIDE 2023 WITH 100% CORRECT ANSWERS(DIAGRAMS INCLUDED).

Milky Way Name of Galaxy that our solar system is located in, plus about 100 billion other stars Group A small collection of galaxies Cluster a large collection of galaxies Supercluster A collection of galaxy clusters Local Group Name of the group of galaxies that contains the Milky Way Sun Name of star that is located closest to Earth Expansion This is happening to the the average distance between galaxies, indicating that they were closer together in the past Big Bang Theory that explains how our Universe began with all matter and energy exploding from a single point accretion When a solar system is forming, matter becomes clumped together as the protostar spins. This is the term for "clumping" into early planets. Vacuum Completely empty space; absent of matter Photon a light particle Protostar A newly formed star Solar Nebula Theory Explains how a solar system forms from a cloud of gas and dust Nebula A huge cloud of gas and dust 300,000 All electromagnetic radiation travels at _______ km/s Electromagnetic Radiation Light energy of any form (gamma, x-ray, Ultraviolet, visible light, thermal radiation, microwaves, and radiowaves) Gamma Type of radiation with the highest frequency, highest energy, and shortest wavelength Frequency The number of wave cycles that pass by in a given second Spectroscopy Astronomers are able to determine the composition of stars using this Light Year distance that light travels in one year 13 billion Using the Hubble Space Telescope, astr