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theseeker
Joined: 25 Jul 2000
Posts: 3403
Location: Damnit...I'm a doctor jim |
Orion's tails ?
 Sun Apr 13, 2003 10:41 pm
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above the airglow layer...
below...
There are many stars in this image shining through the atmosphere. Why aren't more of them streaked? The answer: Earth has an exponential atmosphere--its density increases very rapidly as you sink into it. Orion's belt stars are the lowest of the bright stars in today's image, hence they are refracted most. A few other stars are at about the same low altitude, but they are too dim to display the faint tails.
http://science.nasa.gov/ppod/y2003/11apr_mysterymeteors.htm |
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Mech
Joined: 06 Jun 2001
Posts: 8237
Location: THE 4th REICH USA |
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Mon Apr 14, 2003 5:12 pm
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Are those Hubble Images Seek?
Nice shots.
Verrry neat.
Looks like those young stars are still "cooking".
Probably would look even cooler from a spaceship.
[Edited 1 times, lastly by Mech on 04-14-2003] |
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emfx13
Joined: 25 May 2002
Posts: 959
Location: Hayward Ca.U.S.A. |
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Mon Apr 14, 2003 6:46 pm
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Thank you for sharing,orion has alway's been one of my favorite constellation's!The mythological figure which the constellation represent's is the hunter,with 3 stars figuring his belt,and 3 his sword hung from it.These 6 stars and 5 at orions head,shoulders and feet form the main stars of the constellation.Of the prominent stars in the constellation,only betelgeuse(alpha orionis)is an odd man out being a red super giant at much greater distance.The stars appear bright to us,first because they are relatively nearby(1330 light yrs),and second because they are intrinsically luminous.Rigel(beta orionis)is a blue supergiant star.Many of the other stars in the group including all 3 of the stars of the belt of orion(delta,epsilon and zeta orionis)are giant stars.As stars exaust their fuel they paradoxically brighten for a short time.Since the stars of the belt are brighter than the stars of the sword,one might expect that the belt stars have used most of their nuclear fuel,while the sword stars are still in the prime of life with plenty of fuel in reserve-and this is indeed the case.the belt stars are about 5 million yrs old and the sword stars about 1 or 2 million yrs old.the youngest stars of all are found near the TRAPEZIUM and the ORION NEBULA.If any of you have telescope there is a wealth of objects to behold within this constellation,this is a great place for a beginner to start!Again thanx for the pics seeker!
[Edited 1 times, lastly by emfx13 on 04-14-2003] |
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emfx13
Joined: 25 May 2002
Posts: 959
Location: Hayward Ca.U.S.A. |
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Mon Apr 14, 2003 8:58 pm
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Mech,ISS science officer Don Pettit caught them in a 15-second exposure on January 3, 2003. |
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Mech
Joined: 06 Jun 2001
Posts: 8237
Location: THE 4th REICH USA |
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Mon Apr 14, 2003 9:01 pm
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Well...I guessed half right.
The pics were taken OUTSIDE the earths atmosphere.
They look pretty crispy.
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emfx13
Joined: 25 May 2002
Posts: 959
Location: Hayward Ca.U.S.A. |
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Mon Apr 14, 2003 9:13 pm
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Actually outside the atmosphere is the only place you would be able to take a picture of the "airglow".  |
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theseeker
Joined: 25 Jul 2000
Posts: 3403
Location: Damnit...I'm a doctor jim |
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Tue Apr 15, 2003 10:10 am
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wish my digital looked that crispy....
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Mech
Joined: 06 Jun 2001
Posts: 8237
Location: THE 4th REICH USA |
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Wed Apr 16, 2003 4:40 am
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The first time I saw the Orion Nebula through those Hubble images I was blown away. Kind of illustrated the concept of a "stellar nursery".
Carl Sagan was some of the first authors who turned me onto astronomy with his "COSMOS" series. I know...a lot of you so-called conservatives out there would call him a "potsmoking liberal" but..I still think he wrote some brilliant books and did a lot for the JPL.
[Edited 2 times, lastly by Mech on 04-15-2003] |
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theseeker
Joined: 25 Jul 2000
Posts: 3403
Location: Damnit...I'm a doctor jim |
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Wed Apr 16, 2003 5:32 am
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NOT ME...and as a matter of fact I took a lot of heat at the time for wear those trade-mark turtle neck shirts...
sagan was cool...
"billions and billions" |
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Mech
Joined: 06 Jun 2001
Posts: 8237
Location: THE 4th REICH USA |
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Wed Apr 16, 2003 6:17 am
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Right on Seek!
I have a couple of turtlenecks floating around....somewhere.
"Nu-Klay-ic acids and Nu-kleo-tides.
Part of Theeeee....Cosmic soup."
Damn I miss that man. |
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Lulu
Joined: 22 Dec 2000
Posts: 2501
Location: right here |
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Wed Apr 16, 2003 6:32 am
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Nice to see you two getting along Most excellent pictures seeker. Orion has always held a special fascination for me...especially the belt.
Science Trivia ~ who coined the term googleplex and what does it mean?
[Edited 1 times, lastly by Lulu on 04-15-2003] |
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emfx13
Joined: 25 May 2002
Posts: 959
Location: Hayward Ca.U.S.A. |
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Wed Apr 16, 2003 11:33 pm
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The word "googol" came from
an American mathematician, Dr. Kasner ,it
represents a very, very, very large number; googolplex represents an
enormously much larger number. Both are finite.
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Lulu
Joined: 22 Dec 2000
Posts: 2501
Location: right here |
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Wed Apr 16, 2003 11:35 pm
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hmmmm I heard David Suzuki say that his young son came up with the term--meaning an infinite amount of numbers.
I'll give you the prize anyway Eddie!
[Edited 1 times, lastly by Lulu on 04-16-2003] |
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emfx13
Joined: 25 May 2002
Posts: 959
Location: Hayward Ca.U.S.A. |
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Thu Apr 17, 2003 3:31 am
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theseeker
Joined: 25 Jul 2000
Posts: 3403
Location: Damnit...I'm a doctor jim |
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Thu Apr 17, 2003 8:11 am
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I only play music triva...
this week...
nuthern....
Best Damn Other-wordly Site Period
[Edited 2 times, lastly by theseeker on 04-17-2003] |
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