February 10, 2009
A birthday is what happens when cosmic time briefly puts down the scale of eons and pays attention to a single human year.
Orion's Belt
Birthday · February 10, 2009
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APOD published February 10, 2009. Credit: Martin Mutti, Astronomical Image Data Archive. A publication-date match, not a photo taken on your date. Independent of NASA.
Alnitak, Alnilam, and Mintaka, are the bright bluish stars from east to west (left to right) along the diagonal in this gorgeous cosmic vista. Otherwise known as the Belt of Orion, these three blue supergiant stars are hotter and much more massive than the Sun. They lie about 1,500 light-years away, born of Orion's well-studied interstellar clouds. In fact, clouds of gas and dust adrift in this region have intriguing and some surprisingly familiar shapes, including the dark Horsehead Nebula and Flame Nebula near Alnitak at the lower left. The famous Orion Nebula itself lies off the bottom of this star field that covers about 4.5x3.5 degrees on the sky. This image was taken last month with a digital camera attached to a small telescope in Switzerland, and better matches human color perception than a more detailed composite taken over 15 years ago.
Image credit: Martin Mutti, Astronomical Image Data Archive