DiscussWorldIssues - Socio-Economic Religion and Political Uncensored Debate - View Single Post

**Vikonbarius** · 08-19-2012, 12:24 PM

> Engineers working on NASA's Dawn spacecraft are assessing the status of a reaction wheel after onboard software powered it off on August 8

Drat. After the trouble with Hubble's gyroscopes you think that somebody would have learnt. Was Dawn launched before or after the latest Hubble servicing mission? Hubble's gyroscopes have behaved themselves since the most recent servicing mission.

I care a lot more about Dawn's visit to Ceres than I do about Vesta. Ceres is a dwarf planet. Vesta is not, it's just a big asteroid.

For news items and images from Dawn see http://dawn.jpl.nasa.gov/multimedia/...wn_gallery.asp
eg.

Meteorites from Vesta

May 10, 2012 - PASADENA, Calif. -- This image shows three slices of a class of meteorites that fell to Earth that NASA's Dawn mission has confirmed as originating from the giant asteroid Vesta. The meteorites, known as howardite, eucrite and diogenite meteorites, were viewed through a polarizing microscope, where different minerals appear in different colors. The texture of the rocks reveals that they crystallized at different rates. The image on the left comes from a meteorite named QUE 97053 (Antarctica), which is basaltic eucrite. The image in the middle comes from the Moore County (North Carolina) cumulate eucrite. The image on the right comes from a diogenite meteorite named GRA 98108 (Antarctica).

08-19-2012, 12:24 PM	#5
Vikonbarius Join Date Oct 2005 Posts 433 Senior Member	> Engineers working on NASA's Dawn spacecraft are assessing the status of a reaction wheel after onboard software powered it off on August 8 Drat. After the trouble with Hubble's gyroscopes you think that somebody would have learnt. Was Dawn launched before or after the latest Hubble servicing mission? Hubble's gyroscopes have behaved themselves since the most recent servicing mission. I care a lot more about Dawn's visit to Ceres than I do about Vesta. Ceres is a dwarf planet. Vesta is not, it's just a big asteroid. For news items and images from Dawn see http://dawn.jpl.nasa.gov/multimedia/...wn_gallery.asp eg. Meteorites from Vesta May 10, 2012 - PASADENA, Calif. -- This image shows three slices of a class of meteorites that fell to Earth that NASA's Dawn mission has confirmed as originating from the giant asteroid Vesta. The meteorites, known as howardite, eucrite and diogenite meteorites, were viewed through a polarizing microscope, where different minerals appear in different colors. The texture of the rocks reveals that they crystallized at different rates. The image on the left comes from a meteorite named QUE 97053 (Antarctica), which is basaltic eucrite. The image in the middle comes from the Moore County (North Carolina) cumulate eucrite. The image on the right comes from a diogenite meteorite named GRA 98108 (Antarctica).
	Quote