This image, released in June 2011, shows a vast complex of star-forming clouds and stellar clusters in the Cygnus constellation. The Christmas Tree Cluster, located about 2,500 light-years away in ...
What are constellations and asterisms? Quiz - Can you guess the constellation? Top tips for stargazing How to spot famous constellations and asterisms The Plough Ursa Major Ursa Minor Cygnus - a ...
Proc. Inst. Radio Eng., 20, 1920 (1932). Astrophys. J., 91, 625 (1940). Astrophys. J., 105, 235 (1947). Nature, 158, 234 (1946). Nature, 157, 158 (1946). Nature, 157 ...
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