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Intriguing, precisely repeated radio pulses from the plane of our galaxy were discovered in the late 1960's and half-seriously attributed to "little green men" and called LGMs.
Hubble's law is a statement of a direct correlation between the distance to a galaxy and its recessional velocity as determined by the red shift.
An animation of the movement of galaxies as the universe expands.
Stunning picture gallery of the Hubble telescope's images of planets, nebulae and galaxies.
Images and text relating to the discovery of a massive black hole at the centre of the M87 Galaxy. Images from the Hubble Space Telescope are visible
Excellent sixty symbols video explaining redshift (and blueshift) and how it used to determine the direction galaxies are travelling in.
The official site for NASA's Kepler mission, on a quest to find habitable exoplanets in our galaxy.
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.
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