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Go Back   IceInSpace > General Astronomy > Celestial and Astronomical Events

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  #21  
Old 04-03-2015, 08:54 PM
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Quote:
Originally Posted by ralph1 View Post
http://www.planetary.org/blogs/emily...e-a-guide.html

enjoy!
Notice how in the images the white spot appears to go into darkness later than the rest of the crater. This suggests it is raised. Maybe a mountain?
I was thinking they looked like a hole the way they get smaller towards the limb. This gif by someone on UMSF shows it better perhaps:
https://astro0.files.wordpress.com/2...whitespots.gif

Can't wait to see what they are though!
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  #22  
Old 07-03-2015, 01:00 AM
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Dawn just entered orbit around Ceres!!

They say new photos will be a bit slow until the first science orbit in April.
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  #23  
Old 08-03-2015, 08:35 AM
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Crescent Ceres!
http://www.nasa.gov/press/2015/march.../#.VPt8nSkxGX0

Another picture
http://www.space.com/28757-nasa-dawn...es-future.html
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  #24  
Old 14-03-2015, 09:23 AM
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Well apparently no new pictures till 10th April, then it's full steam ahead till mid-way through next year, should be exciting times with Horizons going on at the same time, clear skies.
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  #25  
Old 18-03-2015, 05:51 PM
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http://news.sciencemag.org/space/201...ic-bright-spot

A possible answer to the white spots?
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  #26  
Old 20-03-2015, 05:04 PM
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Ice in the base of a crater, this is a phenomena which is becoming more and more common throughout the solar system, I wonder what type of element is frozen on Ceres? Could it be Methane, Ammonia or even H2O, it will be interesting to know, perhaps it can be detected with spectroscopy?Clear skies.
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  #27  
Old 14-04-2015, 01:56 PM
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Ceres in Colour

An enhanced colour map of Ceres' surface and a surprising infrared discovery about the white spots

http://www.jpl.nasa.gov/news/news.php?feature=4548
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  #28  
Old 15-04-2015, 10:44 AM
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Quote:
Originally Posted by ralph1 View Post
An enhanced colour map of Ceres' surface and a surprising infrared discovery about the white spots

http://www.jpl.nasa.gov/news/news.php?feature=4548
thanks for sharing Ralph

Russ
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  #29  
Old 17-04-2015, 09:47 AM
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New anim:
http://photojournal.jpl.nasa.gov/archive/PIA19317.gif

Very cool

From here:
http://photojournal.jpl.nasa.gov/catalog/PIA19317
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  #30  
Old 21-04-2015, 06:49 PM
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Yet more Ceres image releases

http://www.space.com/29154-dwarf-pla...ots-video.html

It's still tricky to tell but that bright spot pair may actually be a trio!
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  #31  
Old 15-05-2015, 05:15 PM
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volcanics/geysers??

The latest images at NASA web site of the brightest area now dubbed 'spot 5' shows two main and several smaller distinct bright areas. One of the larger spots is on the side of the crater's central peak and the other near the rim with smaller spots scattered between.

In some images it can be seen that the region around this crater has several/many sub-parallell lineal valleys or ravines that I do not see in other areas. Also in some images it appears one ravine feature is more strongly developed and passes very close to or through the crater, possibly intersecting another linear feature at or near the crater.

It's probable that the combination of the impact with the linear features has created a pathway for warmer water from below to escape to the surface where it forms fresh, clean reflective ice.

I envisage a geyser field. But what is the heat source? No gravitational friction so; ?radiation from decaying 'hot' minerals? residual heat from formation?

Go Dawn!! you liddle bewdy!

Other less bright features may be smaller variations with more restricted pathways and some appear to be fresher craters with debris rays.
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  #32  
Old 21-05-2015, 12:46 PM
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http://www.nasa.gov/jpl/dawn/ceres-b...oser-than-ever

New image, detail is getting sharper!

"Dawn scientists can now conclude that the intense brightness of these spots is due to the reflection of sunlight by highly reflective material on the surface, possibly ice," Christopher Russell, principal investigator for the Dawn mission from the University of California, Los Angeles, said recently.
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  #33  
Old 21-05-2015, 06:04 PM
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Obviously highly reflective, possibly ice or polished metal, polished metal?? from some crashed vessel,..... no not aliens! Probably just ice, clear skies.
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  #34  
Old 31-05-2015, 11:55 AM
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http://www.space.com/29514-nasa-dawn...ers-photo.html

Look in the centre of the hi-res image's largest crater; what is that propeller shaped feature?
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  #35  
Old 31-05-2015, 04:29 PM
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And what about the lines across the surface?

http://photojournal.jpl.nasa.gov/jpeg/PIA19065.jpg


Must have been Shelob -> http://australianmuseum.net.au/uploa.../tk_05_big.jpg
dragging crashed ufos towards its burrow...
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  #36  
Old 02-06-2015, 11:52 AM
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Heaps of small crater chains. I wonder if the surface lines (not the propeller) are crater chains with so many small impacts that they resemble a continuous line.
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  #37  
Old 04-06-2015, 06:46 AM
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For those interested in the history of Astronomy. I've just returned from Sicily. Visited Palermo Observatory where Piazzi discovered Ceres.

http://en.wikipedia.org/wiki/Giuseppe_Piazzi

http://en.wikipedia.org/wiki/Palermo...al_Observatory

RichardJ
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  #38  
Old 10-06-2015, 01:34 PM
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Check out APOD (June 10th) flyover of Ceres

http://apod.nasa.gov/apod/astropix.html

RichardJ
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  #39  
Old 13-06-2015, 10:55 AM
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Smooth crater floor

NASA posted pics (new to me) on the 10th. Look under Dawn in missions.

The floor of the crater that hosts the bright spots is noticeably smoother than any other nearby crater floors. Probably because previous ?water erupting from the bright spots ?springs/geysers has covered the floor hiding any subsequent impact craters and in turn has been covered by dust/debri or otherwise degraded/aged to a dull shade. A bit like the smoother basalt flows Maria on our moon. Also means the bright spots have some longevity.

Note also the deformed shapes of many of the craters including the bright spots one. This is a tectonically active world, and again I wonder what is the mechanism ?heat source.

wotcha reckon, L
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  #40  
Old 18-06-2015, 01:01 PM
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Some nice new pics out:
http://photojournal.jpl.nasa.gov/keywords/dp

Look at this one:
http://photojournal.jpl.nasa.gov/jpeg/PIA19573.jpg
Awesome
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