Comments and questions about the APOD
on the main view screen.
- Otto Posterman
- Posts: 5224
- Joined: Fri Dec 04, 2009 3:27 am
In the Valley of Orion
Explanation: This exciting and unfamiliar view
of the Orion Nebula is a visualization based on astronomical data
and movie rendering techniques. Up close and personal with a famous stellar nursery normally seen
from 1,500 light-years away, the digitally modeled frame transitions from a visible light representation based on Hubble data on the left to infrared data from the Spitzer Space Telescope on the right. The perspective at the center looks along a valley over a light-year wide, in the wall of the region's giant molecular cloud. Orion's valley ends in a cavity carved by the energetic winds and radiation of the massive central stars of the Trapezium star cluster
. The single frame is part of a multiwavelength, three-dimensional video that lets the viewer experience an immersive, three minute flight through the Great Nebula of Orion
- Posts: 74
- Joined: Tue Jul 23, 2013 3:37 am
The walls are surprisingly opaque when looking from within. The night skies on a planet in that valley would be an interesting sight.
- Science Officer
- Posts: 438
- Joined: Fri Jul 15, 2005 1:40 pm
- Location: Md
Very unusual image; the three minute flight video
is very interesting viewing, also - nice job, APOD!
Forget the box, just get outside.
Fred the Cat
- Theoretic Apothekitty
- Posts: 944
- Joined: Mon Feb 22, 2016 4:09 pm
- AKA: Ron
- Location: Eagle, Idaho
It’s like being mesmerized by a familiar setting within a beautiful fog.
Thanks for such a wonderful new perspective!
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Freddy's Felicity "Only ascertain as a cat box survivor"
- Posts: 582
- Joined: Mon Sep 30, 2013 6:35 pm
Interesting visuals, but I question the choice of Dvorak's serenade music, which is gentle, boring and actually depressing. If you were actually sailing through the nebula, your life would be in constant danger from bombardment of deadly gamma rays, cosmic rays and ionized nuclear particles. Not to mention oxygen gas would be pretty rare and you'd have a difficult time just to breathe. A more appropriate music for the occasion would be Steppenwolf's Magic Carpet Ride, or the Beatles Helter Skelter. "I'm coming down fast but I am miles above you. When I get to the bottom I go back to the top! On a cloud of sound I drift in the night. Any place it goes is right. Goes far, flies near. To the stars away from here. Well, you don't know what we can find on a Magic Nebula Ride."
- Posts: 613
- Joined: Sat Jun 09, 2007 10:08 pm
- Location: (52°N, 06°E)
Beautiful, and quite similar to a sequence
from the Hubble 3D (2010)
movie, narrated by DiCaprio.
Intuitively the valley looks weird, as the view is distinctly not isotropic, with a clear open space on the near side and a fluffy nebulous bedding on the far side. Pretty, but how realistic?
- Posts: 1399
- Joined: Mon Aug 29, 2005 12:46 am
- Location: Auburn, Washington, USA
I live in a valley and get a lot of fog also. Different mechanism, I am sure.
- Apathetic Retiree
- Posts: 21558
- Joined: Mon Aug 28, 2006 2:06 pm
- Location: Oklahoma
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk. — Garrison Keillor
- Tea Time, Guv! Cheerio!
- Posts: 1563
- Joined: Wed Feb 16, 2005 2:11 pm
- Location: Lancaster, England
Wow! It's essential, IMHO, to go and see that video - the APOD just hasn't enough to make it comprehensible otherwise!
There's a short part of the sequence, around 1:30, where the PoV flies past an appprently solid object, that appears to move from centre to lower left. It looks like a dandelion seed, complete with canopy. Has someone put a Larry Niven Starseed in there?
But what would the sky look like, from a planet around one of the nebula's stars? Is it old enough to imagine life there? They would have to be poets.
- Abominable Snowman
- Posts: 17791
- Joined: Wed Jan 31, 2007 11:13 pm
- Location: Guffey, Colorado, USA
JohnD wrote:But what would the sky look like, from a planet around one of the nebula's stars?
Well, the nebula would be no brighter than it appears to us with our naked eye from here. So what you'd likely have would be a night sky that is somewhat lighter than we have here (imagine the Milky Way spread out uniformly across the entire sky), and a lot fewer stars (but maybe a few very bright ones). So overall, probably a much less impressive night sky than we have.
JohnD wrote:There's a short part of the sequence, around 1:30, where the PoV flies past an appprently solid object, that appears to move from centre to lower left. It looks like a dandelion seed, complete with canopy. Has someone put a Larry Niven Starseed in there?
That looks to me like a natal star with a protoplanetary disc emitting jets and showing bow shock at one end where it's moving against the flow of the molecular cloud. It's closer to 1:50 in the video.
- :---[===] *
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- Joined: Sun Apr 22, 2007 12:07 am
Such a great view of one of my favorite places...but poses a question.... then what is the biggest valley in the galaxy? In the Universe?