Astrophysics - Cosmology 0.0 / 5 ? PhysicsAstrophysicsA2/A-levelAQA Created by: LaurenCreated on: 04-05-14 09:14 Doppler Effect The shortening or lengthening of wavelength dependent on whether the star is moving towards or away from us. 1 of 9 Wavelength Distance between successive wave peaks of the wave. 2 of 9 Red Shift The shift to longer wavelengths at the red end of the spectrum in light from a source moving away from us. 3 of 9 Blue Shift The shift to shorter wavelengths at the blue end of the spectrum in light from a source moving towards us. 4 of 9 Spectroscopic Binary Two stars cannot bee resolved. 5 of 9 Cepheid Variable Stars These stars vary in brightness with a period of the order of days. 6 of 9 Big Bang Theory The Universe is expanding as it was created in a massive 'primordial' explosion and has been expanding ever since. 7 of 9 Dark Energy Hidden energy being released by a hitherto-unknown type of force causing the Universe to accelerate. 8 of 9 Quasar A very powerful light output, relatively small and very far away object. 9 of 9
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