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8.5.17

Astronomy picture of the day - 2017 May 8 - Ancient Ogunquit Beach on Mars

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Ancient Ogunquit Beach on Mars 
Image Credit: NASAJPL-CaltechMSSS;
Explanation: This was once a beach -- on ancient Mars. The featured 360-degree panoramahorizontally compressed, was taken by the robotic Curiosity rover currently exploring the red planet. Named Ogunquit Beach after itsterrestrial counterpart, evidence shows that at times long ago the area was underwater, while at other times it was at the edge of an ancient lake. The light peak in the central background is the top of Mount Sharp, the central feature inGale Crater where Curiosity has been deployed. Curiosity is slowly ascending Mount Sharp. Portions of the dark sands in the foreground have been scooped up for analysis. The light colored bedrock is composed of sediment that likely settled at the bottom of the now-dried lakebed. The featured panorama (interactive version here) was created from over 100 images acquired in late March and seemingly signed by the rover on the lower left. Currently, Curiosity is carefully crossing deep megaripples of dark sands on its way to explore Vera Rubin Ridge.

Astronomy picture of the day - 2017 May 7 - Star Formation in the Tadpole Nebula

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Star Formation in the Tadpole Nebula 
Image Credit: WISEIRSANASAProcessing & CopyrightFrancesco Antonucci
Explanation: What's all of the commotion in the Tadpole nebula? Star formation. Dusty emission in the Tadpole nebula, IC 410, lies about 12,000 light-years away in the northern constellation of the Charioteer (Auriga). The cloud of glowing gas is over 100 light-years across, sculpted by stellar winds and radiation from embedded open star cluster NGC 1893Formed in the interstellar cloud a mere 4 million years ago, bright newly formed cluster stars are seen all around the star-forming nebula. Notable near the image center are two relatively dense streamers of material trailing away from the nebula's central regions. Potentially sites of ongoing star formation in IC 410, these cosmic tadpoleshapes are about 10 light-years long. The featured image was taken in infrared light by NASA's Wide Field Infrared Survey Explorer (WISE) satellite.