Science Source Feb 2010
EN_90286391_0266
![Science Source Feb 2010](img/medium/arch1/dvd0114/19/EN_90286391_0266.jpg)
Trifid Nebula (M20) is a cloud of gas and dust lying some 3000 light years away in the constellation of Sagittarius. The gas is mostly hydrogen, which glows red because it is excited by ultraviolet radiation from hot young stars lying within it.
2010-02-13
EAST NEWS
Science Source
Science Source
6e6801
1,3MB
29cm x 23cm by 300dpi
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