Home > Asteroids, Astronomy, Dawn, Solar System, Spaceflight, Unmanned Spaceflight > Dawn Mission Discovers Hydrogen On Giant Asteroid Vesta

Dawn Mission Discovers Hydrogen On Giant Asteroid Vesta


The first measurements of the elemental composition of the surface of the giant asteroid Vesta indicate that hydrogen was brought to the body by impactors, research by a team led by Planetary Science Institute Senior Scientist Thomas H. Prettyman has shown.

Using data collected by the NASA Dawn mission’s spacecraft’s gamma ray and neutron detector instrument – GRaND – as it circled the giant asteroid, researchers also confirmed the elemental composition of the surface of Vesta matches meteorites found on Earth believed to have originated from Vesta.

The highest concentrations of hydrogen were found in equatorial regions, where water ice is not stable. The lowest amounts were found within the giant, south-polar Rheasilvia impact basin.

Full Story: http://www.psi.edu/news/press-releases

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