APOD: Dwarf Planet, Bright Spot (2015 May 14)

Comments and questions about the APOD on the main view screen.
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APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by APOD Robot » Thu May 14, 2015 4:08 am

Image Dwarf Planet, Bright Spot

Explanation: Now at Ceres, Dawn's camera recorded this closer view of the dwarf planet's northern hemisphere and one of its mysterious bright spots on May 4. A sunlit portrait of a small, dark world about 950 kilometers in diameter, the image is part of a planned sequence taken from the solar-powered spacecraft's 15-day long RC3 mapping orbit at a distance of 13,600 kilometers (8,400 miles). The animated sequence shows Ceres' rotation, its north pole at the top of the frame. Imaged by Hubble in 2004 and then by Dawn as it approached Ceres in 2015, the bright spot itself is revealed to be made up of smaller spots of reflective material that could be exposed ice glinting in the sunlight. On Saturday, Dawn's ion propulsion system was turned on to spiral the spacecraft into a closer 4,350-kilometer orbit by June 6. Of course another unexplored dwarf planet, Pluto, is expecting the arrival of a visitor from Earth, the New Horizons spacecraft, by mid-July.

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the old blind man

Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by the old blind man » Thu May 14, 2015 4:58 am

This is the roof of the alien underground facility, seemingly a treasure trove of alien technology, but actually an Ackbar singularity, a.k.a 'a trap'.

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Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by somebodyshort » Thu May 14, 2015 5:32 am

I thought the anomaly is buried on the moon

Jandotto

Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by Jandotto » Thu May 14, 2015 8:57 am

It seems unlikely that the white spots are something glinting in the sunlight. In the animated view the spots stay the same throughout their rotation. It seems more likely they are light material - e.g. ice [maybe carbon dioxide?] as opposed to dark rock that pervades the planet.

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Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by ta152h0 » Thu May 14, 2015 2:29 pm

natural LED's
Wolf Kotenberg

MrZorg

Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by MrZorg » Thu May 14, 2015 3:58 pm

Looks like Los Vegas from space at night...

MrZorg

Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by MrZorg » Thu May 14, 2015 3:58 pm

Looks like Los Vegas from space at night...

skiffle

Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by skiffle » Thu May 14, 2015 4:11 pm

APOD Robot wrote:a planned sequence taken
There appear to be several more bright spots scattered around the globe in the planned sequence

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Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by tomruen » Thu May 14, 2015 4:58 pm

I selected cropped frames from the sequence including the spotted crater here:
Click to play embedded YouTube video.

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Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by Astronymus » Thu May 14, 2015 5:28 pm

It's just junk. Left by tourists.
»Only a dead Earth is a good Earth.«

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Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by Boomer12k » Thu May 14, 2015 6:34 pm

I get that when my exposure is just a tad high on my camera, even if it is Jupiter, or Saturn... I have to reduce the exposure a bit, and that takes care of it. Happens with Galaxies, Stars, and even the Moon. Not to ruin the fun.

As per the Sequence LINK... the video shows....this is not the only area, and single frame shots, put into video, and thus could be camera induced.

Either that or it is GOLD!!! GOLD!!! I TELL YOU....MORE GOLD THAN YOU CAN POSSIBLY IMAGINE!!!! GOLD!!!! AAAHAHAHAHAHAHAHAHAHAHAH!!!!!! GOOOOLLLL>.....ur...um....well.....um....NO...not gold....um....IRON...yup....glistening IRON....yup, not gold....nope....no gold there....NOT AT ALL....

Ummmm....going to be gone for a few days.... BYE....

(he, he, he,...Awm gonna be RICH!!!....and nobody knows...)
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Xopianoi

Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by Xopianoi » Thu May 14, 2015 7:39 pm

The animated sequence reveals that this is not a reflection but an emission of light.

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Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by geckzilla » Thu May 14, 2015 7:42 pm

Xopianoi wrote:The animated sequence reveals that this is not a reflection but an emission of light.
No. The spots do not continue to appear when they rotate into the darkness. There is another animation showing them doing this.
http://www.nasa.gov/press/2015/march/na ... et-arrival
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Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by Ron-Astro Pharmacist » Thu May 14, 2015 9:13 pm

It appears, not like Vesta's parallel Divalia Fossa, that Ceres has crevasse-like features in the lower right quadrant. More like the Moon – rille.

http://www2.lpod.org/wiki/March_18,_2006

Rille, cracks or crevasses – it'll be interesting to see what they are.
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WonderBar

Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by WonderBar » Thu May 14, 2015 10:58 pm

Are you telling me they that can't determine what the material is from its light spectrum?
Likely it's water ice as there is seemingly an incredible supply of that stuff in the universe, created in the Waterfall Nebula of course, and shot out into space as globes, to end up circling planets like Jupiter and Saturn, and of course planet earth, out of which (the water) Pangea emerged.

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Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by geckzilla » Thu May 14, 2015 11:22 pm

WonderBar wrote:Are you telling me they that can't determine what the material is from its light spectrum?
Likely it's water ice as there is seemingly an incredible supply of that stuff in the universe, created in the Waterfall Nebula of course, and shot out into space as globes, to end up circling planets like Jupiter and Saturn, and of course planet earth, out of which (the water) Pangea emerged.
The light spectrum might just say you're looking at the Sun. ;)
Just call me "geck" because "zilla" is like a last name.

Reobed

Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by Reobed » Fri May 15, 2015 2:53 pm

In the animated sequence, the bright spot(s) remain at the same brightness at all angles to the sun & camera. That makes it a diffuse reflector, like the rest of the surface, which you get with a layer of fine particles. The spots are much brighter, so much less absorptive = colorless. I think that makes it SNOW, either water or carbon dioxide (methane?).

John Macdonald

Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by John Macdonald » Fri May 15, 2015 3:55 pm

I wonder when Apple Inc. ran a secret space program to put its logo onto Ceres! :-)

Idaho Astro

Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by Idaho Astro » Fri May 15, 2015 5:42 pm

Actually, these are not the same bright features seen by Hubble: http://www.slate.com/blogs/bad_astronom ... spots.html

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Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by geckzilla » Fri May 15, 2015 7:50 pm

Idaho Astro wrote:Actually, these are not the same bright features seen by Hubble: http://www.slate.com/blogs/bad_astronom ... spots.html
Thanks for pointing that out.
Just call me "geck" because "zilla" is like a last name.

WonderBar

Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by WonderBar » Sat May 16, 2015 11:25 am

geckzilla wrote:
Idaho Astro wrote:Actually, these are not the same bright features seen by Hubble: http://www.slate.com/blogs/bad_astronom ... spots.html
Thanks for pointing that out.
That animated sequence hints at a few other bright places, including one which could be a plume strewn onto the surface. Could be Ceres was once a bright snowball into which some very dark objects crashed resulting in a thin coating of dark powder. Is Ceres large enough for tectonic plate activity? Is the major bright spot consisting of smaller spots the result of water geysers?

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Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by Chris Peterson » Sat May 16, 2015 3:16 pm

WonderBar wrote:That animated sequence hints at a few other bright places, including one which could be a plume strewn onto the surface. Could be Ceres was once a bright snowball into which some very dark objects crashed resulting in a thin coating of dark powder. Is Ceres large enough for tectonic plate activity? Is the major bright spot consisting of smaller spots the result of water geysers?
All of these airless bodies darken naturally due to a phenomenon called space weathering. Most asteroids have very low albedos, as do many bodies that are nearly pure ice.

Light areas result from the unweathered material being exposed by impacts or tectonic activity.
Chris

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Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by neufer » Tue May 19, 2015 4:15 pm

Click to play embedded YouTube video.
Art Neuendorffer

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Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by neufer » Fri May 22, 2015 2:28 pm

Art Neuendorffer

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Re: APOD: Dwarf Planet, Bright Spot (2015 May 14)

Post by Ron-Astro Pharmacist » Fri May 22, 2015 8:17 pm

Ron's Top Ten (since Dave isn't around anymore)
1. A good shot with a "clean" snowball
2. Asteroid vomit
3. Ancient alien hieroglyphics
4. A moon shot gone terribly wrong
5. A paint ball shot gone amazingly right
6. An avalanche that likes to skip
7. The smallest asteroid yarmulke ever known; very frayed
8. The opposite of asteroid vomit
9. Asteroid Antarctica calving an iceberg
And finally
10. Our first encounter with "white matter"
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