اخبار نجومی انگلیسی هفت آسمان

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  • Slow-Motion Supernova سه‌شنبه 17 آذر‌ماه سال 1388 19:12
    Supernovae are generally considered as fast and furious events. For the Type II, core collapse supernovae, the core implodes almost instantaneously although it takes some time for the shockwave to escape the star. As it does, the star brightens in what's known as the "rise time" of the supernova . For most...
  • Amateur Spectroscopy سه‌شنبه 17 آذر‌ماه سال 1388 19:11
    Amateur astronomers are a unique species worthy of their own reality TV show. Their craftsmanship, resourcefulness, dedication, and passion is simply amazing. Many professional astronomers rely heavily on amateurs for quick spot checks, discovery followups, collaboration on research projects, the diverse locations of...
  • The Next Generation of Heat Shield: Magnetic سه‌شنبه 17 آذر‌ماه سال 1388 19:03
    Heat shields are an important part of any space vehicle that re-enters the Earth 's atmosphere. The next generation of heat shields to protect astronauts and payloads on their re-entry into the Earth's atmosphere may use superconducting magnets to deflect the plasma that forms in front of spacecraft as they travel at...
  • Observing News: Nova Eridani or Flash Fire? یکشنبه 8 آذر‌ماه سال 1388 21:46
    K. Itagaki of Yamagata, Japan was photographing the night sky in Eridanus two days ago when Hitoshi Yamaoka of Kyushu University noticed an anomaly – a possible classic nova event. Just how big a jump in amplitude did this star make? Try at least seven magnitudes within hours… and Joe Brimacombe was on it. (...) Read...
  • Comets Posing as Asteroids (or is the the other way around?) یکشنبه 8 آذر‌ماه سال 1388 21:45
    Asteroids are rocky bodies which belong between Mars and Jupiter . Comets are icy bodies that belong way out beyond Pluto . So what are comet -like objects doing in the asteroid belt ? (...) Read the rest of Comets Posing as Asteroids (or is the the other way around?) (679 words)
  • Tips for Viewing the Geminid Meteor Shower یکشنبه 8 آذر‌ماه سال 1388 21:41
    Occurring every year in mid-December, the Geminid meteor shower is commonly referred to as the most reliable meteor shower of the year. That is, it almost always puts on a great show! The Geminid meteor shower is sure to be a stunning show this year, as the Moon will not be visible at night, so its glow will not...
  • The View from Down Under یکشنبه 8 آذر‌ماه سال 1388 21:40
    Something that baffled me throughout my childhood, growing up in Australia, was the frequent references to the Man in the Moon , in children’s books and other popular media. I just couldn’t see it. Only in my adult years have I put two and two together and realized that all those references were made by people from...
  • Astronomers Dig Up Relic of the Milky Way's Central Bulge یکشنبه 8 آذر‌ماه سال 1388 21:39
    Terzan 5. Credit: ESO/F. Ferraro Like archaeologists who dig through the layers of dirt to unearth crucial pieces of the history of mankind, astronomers have been gazing through the thick layers of interstellar dust obscuring the central bulge of the Milky Way and have unveiled an extraordinary cosmic relic. Within...
  • Jupiter – Our Silent Guardian? یکشنبه 8 آذر‌ماه سال 1388 21:37
    We live in a cosmic shooting gallery. In Phil Plait's Death From the Skies , he lays out the dangers of a massive impact: destructive shockwaves, tsunamis , flash fires, atmospheric darkening…. The scenario isn't pretty should a big one come our way. Fortunately, we may have a silent guardian: Jupiter. (...) Read the...
  • Requiem – Daniel Marquardt یکشنبه 8 آذر‌ماه سال 1388 21:35
    "Looking up in the sky is one of the greatest things a human being can do. Going out to a silent and dark site, enjoying the beauty of the Universe with friends. You will forget all the problems here on Earth , because you realize that we are only a little funny thing on this ball we call Earth, flying through...
  • First Black Holes May Have Formed in "Cocoons" یکشنبه 8 آذر‌ماه سال 1388 21:34
    Very likely, the last image that comes to mind when thinking of black holes is that they need to be nurtured, coddled and protected when young. But new research reveals the first large black holes in the universe likely formed and grew deep inside gigantic, starlike cocoons that smothered their powerful x-ray...
  • NASA Science News for November 24, 2009 یکشنبه 8 آذر‌ماه سال 1388 21:32
    Data from NASA's STEREO spacecraft have confirmed the stunning reality of monster waves on the sun known as "solar tsunamis." FULL STORY at http://science.nasa.gov/headlines/y2009/24nov_solartsunami.htm?list1035898
  • The Extremely Large Telescope یکشنبه 8 آذر‌ماه سال 1388 21:31
    The European Southern Observatory (ESO) is planning on building a massive – and I do mean massive – telescope in the next decade. The European Extremely Large Telescope (E-ELT) is a 42-meter telescope in its final planning stages. Weighing in at 5,000 tonnes, and made up of 984 individual mirrors, it will be able to...
  • Hot Jupiters Bully Super Earths یکشنبه 8 آذر‌ماه سال 1388 21:30
    Bullies are everywhere and the universe is no exception. In our own solar system , Jupiter 's mass is second only to that of the Sun . Its gravitational effects tug around a set of asteroids known as the Trojans and may prevent the asteroid belt from becoming anything more substantial. Fortunately, our humble planet...
  • Cold as Hell with a Chance of Dust Storms: Weather Movies from M یکشنبه 8 آذر‌ماه سال 1388 21:29
    If you think about it, those hypnotizing patterns of swirling clouds you see in TV weather reports are pretty amazing: satellites let us see what's happening in the skies all over the world. But these days, that kind of global vision even goes beyond the Earth . The Mars Reconnaissance Orbiter makes daily weather...
  • First Collisions for the LHC یکشنبه 8 آذر‌ماه سال 1388 21:28
    Screens showing two beams in the LHC. Credit: CERN Two beams circulated simultaneously inside the Large Hadron Collider for the first time today, allowing for the first proton-proton collisions to take place. “It’s a great achievement to have come this far in so short a time,” said CERN Director General Rolf Heuer....
  • Baby Brown Dwarfs Provide Clues to Solve Mystery یکشنبه 8 آذر‌ماه سال 1388 21:25
    Why – and how — do brown dwarfs form? Since these cosmic misfits fall somewhere between planets and stars in terms of their temperature and mass, astronomers haven't yet been able to determine how they form: are their beginnings like planets or stars ? Now, the Spitzer Space Telescope has found what could be two of...
  • Try Your Hand At Galaxy Zoo's New "Slot Machine" یکشنبه 8 آذر‌ماه سال 1388 21:23
    Here's your chance to play online slot machines without risking your life savings. Plus it's an opportunity to contribute to a citizen science project that is sure to revolutionize our understanding of galaxy mergers. Galaxy Zoo 's newest project asks for help in looking at colliding galaxies , and uses a tool akin to...
  • Ring of Stars in Centaurus A Uncovered یکشنبه 8 آذر‌ماه سال 1388 21:22
    Centaurus A (NGC 5128) is one of the most studied objects in the Southern sky, because it is the giant elliptical galaxy with the closest proximity to our own Milky Way . It lies 11 million light years away from the Milky Way, and is believe to have merged with another gaseous galaxy about 200 to 700 million years...
  • De Plume! De Plume! Enceladus Raw Flyby Images یکشنبه 1 آذر‌ماه سال 1388 21:03
    Raw images are already being returned from Cassini's Nov. 21 "E-8" or eighth flyby of the tiger-striped moon Enceladus. Visible in this raw image are several plumes from fissures in the south polar region of the moon . These fissures spew jets of water vapor and other particles hundreds of kilometers from...
  • Want to be a Martian? یکشنبه 1 آذر‌ماه سال 1388 21:01
    If you've ever dreamed of exploring Mars , but are worried about all that pesky radiation exposure and being cramped in a capsule for the two-year flight – or about never coming back – then your dream may be realized with NASA's " Be a Martian " web site. In the spirit of other citizen scientist...
  • More Cassini Eye Candy: Infrared Saturn, Peek-a-boo Moons یکشنبه 1 آذر‌ماه سال 1388 21:01
    The "wow" factor from the Cassini mission never quits. Here's the latest image, released just today of Saturn , viewed in near- infrared . This image was taken with Cassini's wide-angle camera on Oct. 23, 2009 using a spectral filter sensitive to wavelengths of near- infrared light , centered at 890...
  • Cassini/IBEX Data Changes View of Heliosphere Shape یکشنبه 1 آذر‌ماه سال 1388 20:52
    Though the Cassini mission has focused intently on scientific exploration of Saturn and it's moons , data taken by the spacecraft has significantly changed the way astronomers think about the shape of our Solar System . As the Sun and planets travel through space , the bubble in which they reside has been thought to...
  • Black Hole Drive Could Power Future Starships یکشنبه 1 آذر‌ماه سال 1388 20:47
    Image credit: NASA What would happen if humans could deliberately create a black hole ? Well, for starters we might just unlock the ultimate energy source to create the ultimate spacecraft engine — a potential "black hole-drive" – to propel ships to the stars . It turns out black holes are not black at all;...
  • Plasma Rocket Could Help Pick Up Space Trash یکشنبه 1 آذر‌ماه سال 1388 20:46
    Artist concept of a VASIMR. Credit: Ad Astra Franklin Chang Diaz's proposed VASIMR rocket engine could create very versatile spacecraft. Not only does the plasma-fueled rocket have the potential to make a trip to Mars in just over a month , it could also help clean up space trash in Earth orbit . “Our goal is to be...
  • NASA Science News for November 19, 2009 یکشنبه 1 آذر‌ماه سال 1388 20:43
    Imagine cutting retractable doors in the side of a 747 airliner, installing a 17-ton telescope, and flying to the stratosphere to solve one of astronomy's greatest puzzles. That's what NASA and the German Aerospace Center plan to do with a cutting-edge airborne observatory named SOFIA. FULL STORY at...
  • "X" Marks Puzzling Galactic Bulge یکشنبه 1 آذر‌ماه سال 1388 20:42
    Looking at a galaxy edge-on provides astronomers the opportunity to study different aspects of galaxies than a face-on view offers. This Hubble image of NGC 4710 is part of a survey conducted to provide more information about the puzzling bulges that form around the middle of some galaxies. Have these galaxies been...
  • Anti-Gravity Treadmill Developed from NASA Technology یکشنبه 1 آذر‌ماه سال 1388 20:42
    Ever wonder what it would be like to walk on the Moon or run on Mars ? A treadmill developed using NASA technology can provide users the feeling of moving about in less than 1 G. Anti-gravity treadmills, sold under the name of Alter-G , are becoming common in hospitals, rehab centers, and sports facilities, and just...
  • Astronomers Find Type Ia Supernova Just Waiting to Happen یکشنبه 1 آذر‌ماه سال 1388 20:39
    Type Ia supernovae are a mystery because no one can predict when or where one might occur. But astronomers are hedging their bets on V445 Puppis . A so-called "vampire white dwarf " that underwent a nova outburst after gulping down part of its companion’s matter in 2000, now, it appears this double star...
  • Kid's Astronomy: Celestial Birds Migrate West? یکشنبه 1 آذر‌ماه سال 1388 20:38
    Hello, Cosmic Kids! As the seasons change, not only do the Earthly birds migrate, but so do the celestial ones. In the Northern Hemisphere , it's not unusual to see large flocks of our feathered friends moving on to warmer climes, but did you know that there are bird constellations that are migrating, too? Instead of...