Proctor Crater Sand Dunes Size:45" x 30" (114 cm x 76 cm) At the heart of the

At the heart of the artwork is a set of four monstrously massive stars

They are overlaid on this image to give a scale to Hubble's very narrow view on the heavens

this section of the Carina Nebula is split horizontally between a gas and dust "shoreline" forming a nebula along the bottom part and a ocean-like clear upper portion

This image was acquired by Enhanced Thematic Mapper plus (ETM+) sensor on October 22

Much younger blue stars trace the spiral arms

Proctor Crater Sand Dunes Size:45" x 30" (114 cm x 76 cm) At the heart of theThis view from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter shows two classes of aeolian bedforms within Proctor Crater. The relatively bright, small ridges are ripples. From their study on Earth, and close up examination by the MER rovers (roving elsewhere on Mars), we know that ripples are composed of fine sand (less than 200 microns in diameter) or fine sand coated with coarser sand and