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Croydon Astronomical Society
est. 1956

External Links

CAS is not responsible for the content of external sites as these vary beyond our control.

Heavens Above

See what is visible in you location, of planets, satellites asteroids and comets. Your location needs to be selected from a map, and this can be remembered by logging onto an account.

Astronomy Picture of the Day

Learn about the universe - an updated picture and some explanation by NASA.

Sky Map

Use as an atlas and identify stars with their magnitudes etc.

Space Weather

Shows solar activity such as sunspots, and some amateur images.

SOHO - Solar Observation

View the sun in multi-wavelengths, and hopefuly spot a comet in the Lasco images.

Hubble - Observation Updates

This site shows the current science that is being done with the Hubble Space Telescope.

Aladin Interactive Sky Atlas

Access the Virtual Aladin Observatory portal. Check the science case tutorials and manual of what you need to do. More useful for imagers in recognising starfields.

Cartes du Ciel

A free planetarium and telescope control program which also gives satellite, comet and asteroid predictions.

Members’ own websites

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