Gallery: Space Photos of the Week: Hey Ceres, Why So Blue (and Red)?
<a href="http://www.jpl.nasa.gov/spaceimages/details.php?id=pia21081">NASA/JPL</a>01SPoW-Dec16-03.jpg
The hydrogen concentrations of dwarf planet Ceres (right) compared with that of giant asteroid Vesta (left) shows that Vesta is drier, with a lower percentage of hydrogen.
<a href="https://www.spacetelescope.org/images/potw1650a/">ESA</a>02SPoW-Dec16-05.jpg
This barred spiral galaxy, over 40 million light-years away, lies in the constellation of Grus (The Crane).
<a href="http://m.esa.int/spaceinimages/Images/2016/12/Proba-V_images_Mount_Everest">ESA</a>03SPoW-Dec16-06.jpg
This image shows the snow-capped Himalayan mountains, with vegetation in Nepal shown in red and the green Tibetan Plateau to the north, with Mount Everest and Kanchenjunga among the white peaks between.
<a href="http://www.jpl.nasa.gov/spaceimages/details.php?id=PIA21219">JPL/NASA</a>04SPoW-Dec16-04.jpg
This image depicts one of eight white opals on Jupiter. The “string of pearls” are rotating storms, appearing in the planet’s southern hemisphere.
<a href="http://www.eso.org/public/images/cosmic/">ESO</a>05SPoW-Dec16-02.jpg
When high-energy cosmic rays hit a camera, they jolt it, producing a tiny white point, as shown in this image.
<a href="https://www.nasa.gov/mission_pages/station/research/news/wklysumm_week_of_5dec16.html">NASA/Thomas Pesquet</a>06SPoW-Dec16-01.jpg
This photo was taken by ESA astronaut Thomas Pesquet while flying over South America.
