Baton Rouge Astronomical Society Forum

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 Post subject: Re: Dawn Mission
PostPosted: January 2nd, 2014, 7:51 pm 
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Joined: October 12th, 2009, 3:28 pm
Posts: 3820
Location: Baton Rouge, LA
Scientists at the Max Planck Institute in Germany have studied Dawn's images of Vesta are discovered previously unrevealed geological structures. These structures include craters buried by quakes and material brought by space rocks.

More information:
http://www.nasa.gov/jpl/dawn/asteroid-20131216/


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 Post subject: Re: Dawn Mission
PostPosted: March 3rd, 2014, 7:20 pm 
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Location: Baton Rouge, LA
The mantle of Vesta is lacking the proportion of olivine expected by scientists. This from a 6 November 2013 Nature study. Olivine is a group of minerals harder than glass. It usually doesn't form crystals but when it does the crystals are translucent to transparent and olive-green in color. It occurs in a wide variety of volcanic rock on Earth.

More about olivine:
http://www.esci.umn.edu/courses/1001/minerals/olivine.shtml
http://www.science.smith.edu/geosciences/petrology/Petrography/Olivine/Olivine.html


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 Post subject: Re: Dawn Mission
PostPosted: October 11th, 2014, 4:53 pm 
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Location: Baton Rouge, LA
Dawn had a small hitch last month, but now it has regular ion thrusting. The thrusting stopped for some reason on 11 September, right before scientists were to use the Deep Space Network to communicate with it. Engineers determined the cause was probably a high-energy particle of radiation. Standard thrusting resumed on 15 September. Due to this and another problem related to main antenna's ability to point, Dawn will enter into orbit around Ceres in April, one month later than planned.


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 Post subject: Re: Dawn Mission
PostPosted: October 28th, 2014, 5:32 pm 
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Location: Baton Rouge, LA
Some scientists now speculate that the lack of olivine at the depths of two craters located at Vesta's south pole may be due to an unexpectedly thick crust. Vesta is 530 kilometers wide. The study was in the 17 July Nature.


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 Post subject: Re: Dawn Mission
PostPosted: February 7th, 2015, 6:03 pm 
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Location: Baton Rouge, LA
Dawn is scheduled to reach Ceres in early March. When it reaches that huge target it will become the first spacecraft to orbit two previously-unexplored worlds.

More information:
http://science.nasa.gov/science-news/science-at-nasa/2014/30dec_dawn/


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 Post subject: Re: Dawn Mission
PostPosted: February 27th, 2015, 7:40 pm 
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Joined: October 12th, 2009, 3:28 pm
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Location: Baton Rouge, LA
Tonight at 7:30pm the Highland Road Park Observatory will present "The Dawn Mission", in anticipation of the arrival of the Dawn spacecraft to Ceres. The talk has free admission and is aimed toward a general adult audience.


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 Post subject: Re: Dawn Mission
PostPosted: August 28th, 2017, 3:09 pm 
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Location: Baton Rouge, LA
At the tenth anniversary of its leaving home, HRPO will cover the major discoveries by—and the future of—this ongoing mission. "Dawn at Ceres and Vesta" will be presented on Friday 22 September at 7:30pm. The talk has free admission and is aimed toward a general adult audience.


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