deeksha gupta

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Science

How did we get here? Are we alone? How does the universe work? These are the questions that have driven astronomy since humanity first turned …

Associated Press News

APOD: Milky Way Over Crater Lake with Airglow (2013 Jun 19) Image Credit & Copyright: John H. Moore; Annotation: Judy Schmidt http://apod.nasa.gov/apod/ap130619.html Explanation: How many different astronomical phenomena have come together to create the above vista? Several. First, in the foreground, is Crater Lake -- a caldera created by volcanism on planet Earth about 7,700 years ago. Next, inside the lake, is water. Although the origin of the water in the crater is melted snowfall, the origin of water on Earth more generally is unclear, but possibly related to ancient Earthly-impacts of icy bodies. Next, the green glow in the sky is airglow, light emitted by atoms high in the Earth's atmosphere as they recombine at night after being separated during the day by energetic sunlight. The many points of light in the sky are stars, glowing by nuclear fusion. They are far above the atmosphere but nearby to our Sun in the Milky Way Galaxy. Finally, the bright arch across the image is the central band of the Milky Way, much further away, on the average, than the nearby stars, and shaped mostly by gravity. Contrary to appearances, the Milky Way band glows by itself and is not illuminated by the airglow. The above image is a six-frame panorama taken during about two weeks ago in Oregon, USA. http://johnhmoore.com/ http://geckzilla.com/ Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/discuss_apod.php?date=130619 Annotated Image: http://apod.nasa.gov/apod/image/1306/mwskyglow_moore_annotated_960.jpg #APOD

APOD: Saturn's Hyperion: A Moon with Odd Craters (2013 Jun 30) Image Credit & Copyright: Cassini Imaging Team, SSI, JPL, ESA, NASA http://apod.nasa.gov/apod/ap130630.html Explanation: What lies at the bottom of Hyperion's strange craters? Nobody's sure. To help find out, the robot Cassini spacecraft now orbiting Saturn swooped past the sponge-textured moon in 2005 and 2010 and took images of unprecedented detail. An image from the 2005 pass, shown above in false color, shows a remarkable world strewn with strange craters and a generally odd surface. The slight differences in color likely show differences in surface composition. At the bottom of most craters lies some type of unknown dark material. Inspection of the image shows bright features indicating that the dark material might be only tens of meters thick in some places. Hyperion is about 250 kilometers across, rotates chaotically, and has a density so low that it might house a vast system of caverns inside. http://ciclops.org/view.php?id=1507 http://photojournal.jpl.nasa.gov/catalog/PIA07740 http://saturn.jpl.nasa.gov/science/moons/hyperion/ Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/discuss_apod.php?date=130630 #APOD

NASA readies its rescue plan for planet-hunting Kepler probe

An artist's conception shows the Kepler observatory in space.<p>The team behind NASA's planet-hunting Kepler observatory says it will start trying to revive the ailing probe in mid- to late July.<p>Two of the four reaction wheels in Kepler's fine-pointing guidance system are out of commission, which has …

Space-time loops may help explain black holes

Physics cannot describe what happens inside a black hole. There, current theories break down, and general relativity collides with quantum mechanics, creating what's called a singularity, or a point at which the equations spit out infinities.<p>But some advanced physics theories are trying to bridge …

Quantum Mechanics

Hubble telescope discovers alien 'deep blue' planet

The heavens are home to an alien world that shines a deep cobalt blue in a solar system far, far away from our own.<p>Astronomers used the ageing Hubble space telescope to determine the true colour of the distant world, the first time such a feat has been achieved for a planet that circles a star …

One Small Step For Man, One Giant Lunar Park For The U.S.?

Can astronauts Neil Armstrong and Buzz Aldrin's "giant leap for mankind" be permanently preserved? Two House Democrats want to do just that: They proposed a bill to create a national historic park for the Apollo 11 mission — on the moon. The legislation would designate a park on the moon to honor …

Canadian, World, Politics and Business News & Analysis

Business (Canada)

India plans to launch first Mars mission, test large rocket this year

Mars Mission