| The constellation Orion | ||||||||
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| Orion, the mighty hunger, is a winter constellation and for those who grew up watching the stars, the three bright blue stars in orion's belt rising in the east is a sure sign of the coming winter, and just as surely, when orion begins to set in the western sky, spring can't be very far behind. In the above photo, there are over 10,000 stars, much more than the naked eye can see. Thanks to the magic of long exposure photography, you can see countless more stars and nebula than even the most powerful of telescopes can resolve. In this photo you'll notice: - The bright orange star Betelgeuse (pronounced beetle-juice). This is a dying star, a red giant, if this star were at the center of our solar system, its outer edges would extend to saturn - The three bright blue stars in a row making up Orion's belt - The left (eastern) most star in Orion's belt, alnitak, is surrounded by two red nebulous complexes, the famous horsehead nebula and the not so famous flame nebula - Below the three stars in Orion's belt are the three "stars" making up orion's sword. To the naked eye, the center of these three stars appears as a diffuse cloud instead of a star, that's because you're looking at one of the only naked eye visible nebulas in the galaxy, the Great Orion Nebula. In this picture, it's a bright pink patch, but under a telescope, it actually appears as a greenish cloud. This is the birthplace (a star nursery if you will) of thousands of new stars. - To the left (east) of Orion's belt and sword is a huge red crescent, that's called Barnard's loop and is all that's left of a several thousand year old supernova (exploding star). The reddish hue is generated by ionized hydrogen, also known as hydrogen alpha. - Finally, in the lower right hand corner of this photo is Orion's front foot, the blue star rigel. Photographic details, two exposures, 10 and 15 minutes digitally combined, guided with a GM-8 losmandy mount, 50mm lens set at f/4, Olympus OM-1 (circa 1970) all shot on Kodak Royal Gold 200. |
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