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02/14/2004 12:06:19 PM · #1 |
Those into astronomy may find this interesting.
A new Nebula near Orions M78 was discovered recently by an amature astronomer using a 3 inch refractor telescope in his back yard. Images before September 2003 of this area do not show this nebula. Some exciting stuff.
McNeil's Nebula
James
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02/14/2004 01:22:24 PM · #2 |
| Amazing what a little guy can do. With not much equipment but a lot of time and energy spent a lot can be achieved. Great story. One way to get in the history books. |
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02/14/2004 01:29:14 PM · #3 |
Technically, it's not new. The nebula has existed and was undetected for as long as it took for the light to travel here.
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02/14/2004 01:35:13 PM · #4 |
Technically, it's not new. The nebula has existed and was undetected for as long as it took for the light to travel here.
Technically everything that you see is in the past. |
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02/14/2004 01:37:48 PM · #5 |
Note that those photos posted were NOT the ones the guy who discovered the nebula took.
I really want to try this technique next time I have a thirty hour exposure to do ... from the title it sounds like it might attract attention on the sidewalk as well.
====== from the Gemini Project description of photographing early galaxies =========
The problem lies in the fact that key spectroscopic features used to study these galaxies have been redshifted -- due to the expansion of the Universe -- into a part of the optical spectrum that corresponds to a faint, natural, obscuring glow in the Earth's nighttime atmosphere.
To overcome this problem, a sophisticated technique called "Nod & Shuffle" was used on the Gemini telescope. "The Nod and Shuffle technique enables us to skim off the faint natural glow of the night sky to reveal the tenuous spectra of galaxies beneath it. These galaxies are over 300 times fainter than this sky glow," explains Dr. Kathy Roth, an astronomer at Gemini who was also part of the team and obtained much of the data. "It has proven to be an extremely effective way to radically reduce the "noise" or contamination levels that are found in the signal from an electronic light detector."
Each observation lasted the equivalent of about 30 hours and produced nearly 100 spectra simultaneously. |
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