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7.1 Vocab

Words from chapter 7.1 Science

WordDefinition
Accretion The process in which particles of rock and dust come together due to gravity to form a larger object
Binary star system two stars that orbit a centre of mass
Black Hole collapsed star so massive not even light can escape its gravitational feild
Galaxy Large group of stars attracted to each other by gravity
Gravity The force that causes all matter to collect together
Light-year The distance light travels in a year
Milky Way The Galaxy in which the Solar System is
Nebula Cloud of gas found i empty space between stars; birthplace of new stars
Nuclear Fusion The process of hydrogen turning into helium, producing light and heat
Parallax A technique used to measure distance to other stars
Parsec Astronomical unit of length - 3.26 l.y
Protoplanetary disk disk of gas surrounding protostar that will turn into planets
Protostar Collapsing cloud of gas that will become a star
Radiation pressure Force produced by radiation from pressure caused by heat
Stellar Parallax apparent change of position of a star due to earth's rotation around the sun
Supermassive Black Hole Black hole millions or billions times the mass of our sun found at the centre of galaxies.
Created by: from01