اخبار نجومی انگلیسی هفت آسمان

عناوین یادداشت‌ها

  • Measuring the Coronal Temperature with Iron یکشنبه 20 دی‌ماه سال 1388 01:21
    This image of the solar corona contains a color overlay of the emission from highly ionized iron lines and white light taken of the 2008 eclipse. Red indicates iron line Fe XI 789.2 nm, blue represents iron line Fe XIII 1074.7 nm, and green shows iron line Fe XIV 530.3 nm. This is the first such map of the 2-D...
  • WISE یکشنبه 20 دی‌ماه سال 1388 01:20
    Caption: WISE First Light image . Image credit: NASA/JPL-Caltech/UCLA "In many respects, the most important moment for a telescope is its first light ," said Bill Irace, project manager for the Wide-field Infrared Survey Explorer (WISE) spacecraft, speaking at the 215th American Astronomical Society meeting....
  • NASA Science News for January 7, 2010 یکشنبه 20 دی‌ماه سال 1388 01:16
    NASA is building a new space telescope named "NuSTAR" to answer a question that has been vexing astrophysicists for decades: Why won't the supernova explode? FULL STORY at http://science.nasa.gov/headlines/y2010/07jan_nustar.htm?list1035898
  • Arp's Phantom Jet یکشنبه 20 دی‌ماه سال 1388 01:16
    Arp 192 from his publication (left) compared to SDSS image (right). Prominent jet in upper right is present in Arp's image is missing from modern images. During the “Great Debate” of 1920 astronomers Herber Curtis and Harlow Shapley had a famous debate on the nature of “spiral nebulae ”. Curtis argued they were...
  • Early Release Science from Hubble WFC3 at AAS Conference یکشنبه 20 دی‌ماه سال 1388 01:15
    The image above is a newly released image from the Hubble Space Telescope . The image shows a mosaic of a portion of the Great Observatories Origins Deep Survey (GOODS) South Field nearly 1/3 the size of the full moon taken in September and October of 2009. It combines data taken in 10 filters that span the infrared...
  • Chandra Stares Deep into the Heart of Sagittarius A* یکشنبه 20 دی‌ماه سال 1388 01:14
    Caption: Latest Chandra image of Sgr A*. Credits: X-ray: NASA/CXC/MIT/F. Baganoff, R. Shcherbakov et al. How long can you stare at an object? This Chandra image of the supermassive black hole at the center of the Milky Way Galaxy , known as Sagittarius A * (or Sgr A* for short)Sgr A* and the surrounding region is...
  • New Pulsar یکشنبه 20 دی‌ماه سال 1388 01:13
    This illustration shows a pulsar 's magnetic field (blue) creates narrow beams of radiation (magenta). Image credit: NASA How do you detect a ripple in space -time itself? Well, you need hundreds of precision clocks distributed throughout the galaxy , and the Fermi gamma ray telescope has given astronomers a new way...
  • How Common are Solar Systems Like Ours? یکشنبه 20 دی‌ماه سال 1388 01:12
    Solar system montage. Credit: NASA On the whole, we'd like to think we're special, but we also hope we aren't alone in the Universe . Astronomers have been trying to figure out just how common solar systems like ours are across the cosmos, and during one moment of epiphany one scientist figured out how to make the...
  • Kepler Discovers Planets-like Objects Hotter Than Stars یکشنبه 20 دی‌ماه سال 1388 01:11
    Possible habitable zones around stars . Credit: Kepler mission The Kepler mission announced the discovery of 5 new extrasolar planets today at the American Astronomical Society meeting in Washington, DC, each with some very unusual properties. But additionally, the space telescope has spotted some Jupiter -sized...
  • Stellar Destruction Could Be from Intermediate Black Hole یکشنبه 20 دی‌ماه سال 1388 01:10
    NGC 1399, an elliptical galaxy about 65 million light years from Earth . Credit: NASA, Chandra A dense stellar remnant has been ripped apart by a black hole a thousand times as massive as the Sun . If confirmed, this discovery would be a cosmic double play: it would be strong evidence for an intermediate mass black...
  • Dual Black Holes Spinning in a Cosmic Dance – Complete with Disc یکشنبه 20 دی‌ماه سال 1388 01:09
    Caption: An image of the galaxy COSMOS J100043.15+020637.2 taken with the Advanced Camera for Surveys on the Hubble Space Telescope . Image courtesy Dr. Julia Comerford. Astronomers have discovered 33 pairs of merging black holes in cosmic dances around each other, a finding that was predicted or 'choreographed' by...
  • Intergalactic Connection is Older, Longer than Thought یکشنبه 20 دی‌ماه سال 1388 01:08
    Our galaxy has a streamer, though it's not like the ones you had on your bike as a kid: this streamer is a flow of largely hydrogen gas that originates in the Large and Small Magellanic Clouds , two of our closest galactic neighbors. New observations of the stream have helped to revise its age and extent, and show it...
  • Could A Faraway Supernova Threaten Earth? یکشنبه 20 دی‌ماه سال 1388 01:07
    Supernovae, just like any other explosions, are really cool. But, just like any other explosion, it's preferable to have them happen at a good distance. The star T Pyxidis, which lies over 3,000 light-years away from the Earth in the constellation Pyxis , was previously thought to be far enough away that if anything...
  • NASA Science News for January 4, 2010 شنبه 19 دی‌ماه سال 1388 23:43
    NASA's Kepler space telescope, designed to find Earth-size planets in the habitable zone of sun-like stars, has discovered its first five new exoplanets. FULL STORY at http://science.nasa.gov/headlines/y2010/04jan_fiveplanets.htm?list1035898
  • Do Eruptions of P Cygni Point to a Companion? شنبه 19 دی‌ماه سال 1388 23:42
    The other day, I wrote an article on Luminous Blue Variables (LBVs) which made reference to P Cygni as a well established LBV to which a group made comparisons. While P Cygni is a good example of an LBV, it has many interesting characteristics in its own right. Prior to August 8, 1600, the star was not known to exist,...
  • Water on the Moon Revisited شنبه 19 دی‌ماه سال 1388 23:25
    Undoubtedly, one of the biggest space news stories of 2009 was the double news story of finding water on the Moon . First, in September, scientists from three different space missions announced they had detected widespread water across the surface of the Moon . Then in November, the LCROSS science team held a press...
  • Blue Moon Eclipse Photos from Santhosh Nandakumar شنبه 19 دی‌ماه سال 1388 23:23
    We couldn't see the eclipse from my house on Vancouver Island , but Santhosh Nandakumar was kind enough to send in this sequence of images of the eclipse from Coimbatore, TN, India.
  • MN112 – A New Luminous Blue Variable Found From Its Nebula? شنبه 19 دی‌ماه سال 1388 23:22
    Eta Carinae Luminous Blue Variables (LBVs) are a rare class of extremely massive stars that teeter on the very edge of being stable. The most famous of this class of stars is the well studied Eta Carinae. Like many other LBVs, Eta Carinae is shrouded in a nebula of its own making. The instability of the star causes it...
  • New Year's Eve Blue Moon Eclipse from Cornwall شنبه 19 دی‌ماه سال 1388 23:20
    New Year's Eve Eclipse. Photo by Nathanial Burton-Bradford Happy New Year! Thanks to Nathanial Burton-Bradford for sharing his photo of the New Year's Eve Blue Moon Eclipse. "Very hazy high level clouds over Cornwall so not very clear, unfortunately," Nathanial wrote this morning. But beautifully...
  • New Year's Resolution: Find the Mars Polar Lander شنبه 19 دی‌ماه سال 1388 18:20
    Finding hidden treasure would be a great way to start the new year, don't you think? And somewhere in this patterned landscape the remains of a missing spacecraft could be hidden, just waiting to be found. The Mars Polar Lander arrived at the Red Planet 10 years ago in December of 1999, but just before the lander...
  • NASA Science News for December 31, 2009 شنبه 19 دی‌ماه سال 1388 18:17
    NASA's Mars rover Spirit is about to mark six years of unprecedented science exploration and inspiration for the American public. However, the upcoming Martian winter could end the roving career of the beloved, scrappy robot. FULL STORY at http://science.nasa.gov/headlines/y2009/31dec_uncertainfuture.htm?list1035898
  • NASA Science News for December 29, 2009 شنبه 19 دی‌ماه سال 1388 18:16
    This week, for the first time in almost twenty years, there's going to be a Blue Moon on New Year's Eve . FULL STORY at http://science.nasa.gov/headlines/y2009/29dec_bluemoon.htm?list1035898
  • NASA Science News for December 23, 200۹ شنبه 19 دی‌ماه سال 1388 18:15
    The solar system is passing through an interstellar cloud that physics says should not exist. In the Dec. 24th issue of Nature, a team of scientists reveal how NASA's Voyager spacecraft have solved the mystery. FULL STORY at http://science.nasa.gov/headlines/y2009/23dec_voyager.htm?list1035898
  • NASA Science News for December 18, 2009 شنبه 19 دی‌ماه سال 1388 18:14
    NASA's Cassini Spacecraft has captured the first flash of sunlight reflected off a lake on Saturn's moon Titan, confirming the presence of liquid on the part of the moon dotted with many large, lake-shaped basins. FULL STORY at http://science.nasa.gov/headlines/y2009/18dec_titanglint.htm?list1035898
  • NASA Science News for December 17, 2009 شنبه 19 دی‌ماه سال 1388 18:14
    NASA Science News for December 17 , 2009 A continent-wide network of all-sky cameras has photographed a never-before-seen phenomenon: colliding auroras that produce explosions of light. The must-see images have solved a long-standing mystery of Northern Lights . FULL STORY at...
  • Galaxy Zoo is Expanding to Include a Whole New "Zooniverse" دوشنبه 23 آذر‌ماه سال 1388 11:17
    Galaxy Zoo has been an enormously successful citizen science project ; so much so, that other astronomers, as well as scientists from other disciplines, have taken notice and now they want to get in on the act of having the public help make discoveries about our world and Universe . Today, the Galaxy Zoo team has...
  • First (of many) Gorgeous Pictures from the New VISTA دوشنبه 23 آذر‌ماه سال 1388 11:16
    Well, the WISE infrared all-sky satellite may be delayed until Monday , but the new infrared southern sky survey telescope VISTA (Visible and Infrared Survey Telescope for Astronomy ) right here on Earth has gone online and released its first few gorgeous pictures.(...) Read the rest of First (of many) Gorgeous...
  • Forming Planets Around Binary Stars دوشنبه 23 آذر‌ماه سال 1388 11:16
    Fanciful science fiction and space art frequently depict the lovely visage of a twin sunset where a pair of binary stars dips below the horizon (think Star Wars). While it has been established that planets could exist in such a system by orbiting in resonances, that only holds true for fully formed planets. Can...
  • Spirals, Tides, and M51 دوشنبه 23 آذر‌ماه سال 1388 11:15
    Spiral galaxies are undoubtedly one of the most beautiful structures in the universe . Yet, their simple elegance belies a complex nature. How do such structures not "wind up" and what causes them in the first place? The answers to these questions is a long standing challenge. Under one model, spiral...
  • Phobos and Deimos Together At Last! دوشنبه 23 آذر‌ماه سال 1388 11:14
    ESA's Mars Express orbiter took images last month of Mars two moons , Phobos and Deimos . This is the first time the moons have been imaged together in high resolution, but as Emily Lakdawalla points out on Planetary Blog, not the first time the two have been imaged together: the Spirit rover did it back in 2005! But...