Research Highlights | Published:

Planetary science

Where Ceres hides its water

Nature volume 540, page 487 (22 December 2016) | Download Citation

Image: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA

Frozen water has been lurking beneath the rocky surface of the Solar System's biggest asteroid since its birth billions of years ago.

NASA's Dawn spacecraft began orbiting Ceres (pictured), which is also a dwarf planet, in 2015. This allowed a team led by Thomas Prettyman at the Planetary Science Institute in Tucson, Arizona, to measure hydrogen at the asteroid's surface. Water inside Ceres chemically alters the surface, leaving a hydrogen imprint there. The highest hydrogen concentrations appeared at mid to high latitudes.

A second study looked at ice trapped in permanently shadowed regions of Ceres' surface. Of the 634 craters studied, only 10 contained icy material, say Thomas Platz of the Max Planck Institute for Solar System Research in Göttingen, Germany, and his colleagues. Ceres, like Mercury and the Moon, can apparently trap frozen water in dark areas for long periods of time, they add.

About this article

Publication history

Published

DOI

https://doi.org/10.1038/540487e

Authors

    Comments

    By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

    Newsletter Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing