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Excellent sixty symbols video explaining redshift (and blueshift) and how it used to determine the direction galaxies are travelling in.
Great explaining on how we measure distances to stars using parallax and distances to galaxies using Cepheid Variables stars.
Leicester University's extensive guide to the solar system, the wider galaxy and space missions with lots of excellent photographs, illustrations and links
Cepheid Variables stars can tell astronomers how far away galaxies are.
How many galaxies are there in the universe? Nice infographic with some cool facts about our universe, the solar system and outer space.
Links and information on all aspects of cosmology including the Big Bang, Galaxies and Clusters, Cosmic Radiation and Cosmic Strings. All the information is supported with images and there are a ...
The expanding universe is a complicated place. This video explains how faster galaxies can move faster than light and how we can see light from beyond our observational universe.
Read how Cepheid Variable stars can tell you distances to galaxies.
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