Proctor Crater Sand Dunes Size:45" x 30" (114 cm x 76 cm) The star-birthing frenzy in 30

The star-birthing frenzy in 30 Doradus may be partly fueled by its close proximity to its companion galaxy

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

003 kilometers

Much younger blue stars trace the spiral arms

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

Proctor Crater Sand Dunes Size:45" x 30" (114 cm x 76 cm) The star-birthing frenzy in 30This 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