p1- the earth in the universe 0.0 / 5 ? PhysicsEarth in spaceGCSEOCR Created by: moggymogs123Created on: 09-10-16 19:16 The age of the solar system 5 thousand million years (approx.) 1 of 12 Asteroids and comets Asteroids are lumps of rock in space, whereas comets are lumps of ice and rock orbiting the sun 2 of 12 The formation of the solar system. gas and dust, pressure, collapse, protostar (fusion), a lot of heat+light means stars form, clumps around sun (heavier atoms-planets) 3 of 12 Fusion hydrogen nuclei fuse to become helium. This is where a stars energy comes from. 4 of 12 Speed of light 300,000 km/s 5 of 12 Light Years the distance light travels through a vacuum in a year. (not a toy story character...) DISTANCE!NOT TIME!! 6 of 12 Ages of earth, sun, universe Earth: 5000 million, sun: 5000 million, universe: 14,000 million 7 of 12 Relative Brightness brighter=closer.. but it could be quite close but not actually that bright (versa) 8 of 12 Parallax Something appears to move when you look at it from diff places. Astronomers take pics 6 months apart (distance too small).. 9 of 12 light pollution street lamps etc... hard and dim to see things 10 of 12 Distant galaxies are.... Moving away from us! wavelength of light changes, becomes redder= REDSHIFT. you can work out how quickly its moving away. EXPANDING!! 11 of 12 Big bang theory used to be v compressed- still expanding now. 12 of 12
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