P1 The Earth in the Universe 0.0 / 5 ? PhysicsEarth in spaceGCSEOCR Created by: sanakhobzi1208Created on: 16-04-17 21:24 What is a light year? the distance that light travels 1 of 5 What is parallax? when something appears to move when you look at it from a distance 2 of 5 What is redshift? when a galaxy is moving away, the wavelength of light from it changes 3 of 5 Summarise the big bang all matter in the universe was compressed into very small space; it exploded and started expanding , and the expansion is still going on now 4 of 5 the further away the galaxy is, the faster it moves away from us the whole universe is expanding - the big bang 5 of 5
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