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APOD: Cometary Globules (2013 Oct 12) Image Credit & Copyright: Subaru Telescope (NAOJ) & DSS; Assembly and Processing: Robert Gendler http://apod.nasa.gov/apod/ap131012.html Explanation: Bright-rimmed, flowing shapes gather near the center of this rich starfield toward the boarders of the nautical southern constellations Pupis and Vela. Composed of interstellar gas and dust, the grouping of light-year sized cometary globules is about 1300 light-years distant. Energetic ultraviolet light from nearby hot stars has molded the globules and ionized their bright rims. The globules also stream away from the Vela supernova remnant which may have influenced their swept-back shapes. Within them, cores of cold gas and dust are likely collapsing to form low mass stars, whose formation will ultimately cause the globules to disperse. In fact, cometary globule CG30 (upper right in the group) sports a small reddish glow near its head, a telltale sign of energetic jets from a star in the early stages of formation. http://www.robgendlerastropics.com/ http://www.naoj.org/ Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/discuss_apod.php?date=131012 #APOD
PhysicsWhy Do You Feel Lighter at the Top of a Ferris Wheel?<p>Author: Rhett AllainRhett Allain<p>EcologyHow Plastic Straws Slip Through the Cracks of …
Here's the path of the nearly 1,400 asteroids that would cause "major devastation" if they hit our planet.<p>It's no surprise that NASA is keeping track of all potentially hazardous objects, or PHOs, that surround our planet. If it's closer than 4.6 million miles away and larger than about 350 feet in …
The Andromeda galaxy, M31, our Milky Way's closest neighbor, is the most distant object in the sky that you can see with your unaided eye. See a gallery of Andromeda in different wavelengths: http://oak.ctx.ly/r/91oz Below, ESA Herschel space observatory image of Andromeda (M31) using both PACS and SPIRE instruments to observe at infrared wavelengths of 70 mm (blue), 100 mm (green) and 160 mm and 250 mm combined (red).
The Danxia scenic area in Gansu province, north-west China, is a landform of reddish sandstone that has been eroded to create unusual rock formations