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عناوین یادداشت‌ها

  • Weekend SkyWatcher's Forecast: September 4-6, 2009 چهارشنبه 18 شهریور‌ماه سال 1388 23:37
    Greetings, fellow SkyWatchers! Ah, yes… Full Moon . Are you ready to howl? If you didn't get a chance to watch the galiean moons do their dance last weekend, then be sure to catch the awesome video you'll find inside! In the meantime, keep your ears alert for the rise of tonight's "Full Corn Moon" and check...
  • Andromeda Galaxy Eating the Neighborhood چهارشنبه 18 شهریور‌ماه سال 1388 23:34
    From Earth, the Andromeda Galaxy looks like a calm, bright galaxy, and is visible with the naked eye in our night sky. But astronomers have discovered things aren't as tranquil as it seems over at M31 . Andromeda is eating the neighbors. (...) Read the rest of Andromeda Galaxy Eating the Neighborhood (366 words)
  • White Dwarf "Close" to Exploding as Supernova چهارشنبه 18 شهریور‌ماه سال 1388 23:33
    ESA’s XMM-Newton orbiting X-ray telescope has uncovered the first close-up of a white dwarf star that could explode into a type Ia supernova within a few million years. That's relatively soon in cosmic time frames , and although this white dwarf that is orbiting its companion star HD 49798, is far enough away to pose...
  • NASA Science News for September 3, 2009 چهارشنبه 18 شهریور‌ماه سال 1388 23:26
    The sun is in the pits of the deepest solar minimum in nearly a century. Weeks and sometimes whole months go by without even a single tiny sunspot. Are sunspots disappearing? Experts discuss the question in today's story from Science@NASA. FULL STORY at...
  • Astronomers Find Most Distant Supermassive Black Hole Yet چهارشنبه 18 شهریور‌ماه سال 1388 23:25
    Composite pseudo-color image of the QSO (CFHQSJ2329-0301). The RGB colors are assigned to z0; zr and i0-bands, respectively. The figures are north up, east left. Credit: Goto et al. A long time ago in a galaxy far, far away there was a supermassive black hole ….. Astronomers from the University of Hawaii have spotted...
  • Watch Saturn's Rings Disappear (Video) چهارشنبه 18 شهریور‌ماه سال 1388 23:23
    On September 4, 2009, Earth 's orbital motion will carry it through the same plane as Saturn's rings. From our vantage point, the rings will disappear. Usually these ring plane crossings — which only happen about every 15 years — are great opportunities to observe Saturn's moons . But this year's ring plane crossing...
  • New Way to Measure Curvature of Space Could Unite Gravity Theory چهارشنبه 18 شهریور‌ماه سال 1388 23:21
    Einstein's general theory of relativity describes gravity in terms of the geometry of both space and time. Far from a source of gravity, such as a star like our sun , space is "flat" and clocks tick at their normal rate. Closer to a source of gravity, however, clocks slow down and space is curved. But...
  • Bareket Observatory Celebrates International Year Of Astronomy چهارشنبه 18 شهریور‌ماه سال 1388 23:18
    The Bareket Observatory in Israel just did something really remarkable – they celebrated the International Year of Astronomy with a live webcast for the entire world! During the event one could listen to live explanations by a U.S. astronomer and enjoying a special musical representation to those who are blind. I had...
  • Is The Milky Way Doomed By Galactic Bombardment? چهارشنبه 18 شهریور‌ماه سال 1388 23:17
    As scientists attempt to learn more about how galaxies evolve, an open question has been whether collisions with our dwarf galactic neighbors will one day tear apart the disk of the Milky Way. That grisly fate is unlikely, a new study now suggests. (...) Read the rest of Is The Milky Way Doomed By Galactic...
  • NASA Science News for August 31, 2009 چهارشنبه 18 شهریور‌ماه سال 1388 23:12
    NASA is planning a daring new mission to investigate the Universe's favorite way of making things explode. Unlocking the secrets of " magnetic reconnection " could help alleviate the energy crisis on Earth. FULL STORY at http://science.nasa.gov/headlines/y2009/31aug_mms.htm?list1035898
  • Future Designs: Robotic Mars Greenhouse, Teleporting Fridge دوشنبه 9 شهریور‌ماه سال 1388 19:19
    Now THIS is what I'm talking about! Every year Electrolux holds a competition for students to design concepts for future appliances, and they've just announced the eight finalists. My favs: a robotic greenhouse for Mars and a teleporting refrigerator. Le Petit Prince (Little Prince) is a robotic greenhouse concept...
  • Loch Ness Monster On Google Earth? دوشنبه 9 شهریور‌ماه سال 1388 19:17
    As only a British tabloid (and Fox News ) could, reports came out this week of the Loch Ness Monster being spotted on Google Earth . "This amazing image on Google Earth could be the elusive proof that the Loch Ness Monster exists," The Sun reported. Well, for one thing, this doesn't look *anything* like...
  • Mars Reconnissance Orbiter Goes Into Safe Mode Again دوشنبه 9 شهریور‌ماه سال 1388 19:12
    NASA's Mars Reconnaissance Orbiter put itself into a safe mode Wednesday morning, Aug. 26, for the fourth time this year. While in safe mode, the spacecraft can communicate normally with Earth , but aborts its scheduled activities, and awaits further instructions from ground controllers. "We hope to gain a better...
  • LookUP to Find Astronomical Objects دوشنبه 9 شهریور‌ماه سال 1388 19:11
    Sky map of Epsilon Aurigae Have you heard about LookUP ? Stuart Lowe from the Jodrell Bank Centre for Astrophysics created this web tool to provide quick access to information about the the position and other details of specific astronomical objects. Instead of having to go search through an astronomical database, all...
  • The Universe DVD Giveaway دوشنبه 9 شهریور‌ماه سال 1388 19:10
    In case you haven't heard, Season 4 of the History Channel's " The Universe " has begun. To help celebrate, they've generously offered to give away two sweet prizes related to the show. One person will get " The Universe Collector's Set ", which contains Season 1, Season 2, and the 2 specials. And...
  • Researchers Say Sun Cycle Alters Earth's Climate دوشنبه 9 شهریور‌ماه سال 1388 19:09
    If the energy from the sun varies by only 0.1 percent during the 11-year solar cycle , could such a small variation drive major changes in weather patterns on Earth ? Yes, say researchers from the National Center for Atmospheric Research (NCAR) who used more than a century of weather observations and three powerful...
  • Fog on Titan? Help Review Mike Brown's Paper دوشنبه 9 شهریور‌ماه سال 1388 19:07
    Titan is the only place in the solar system other than the earth that appears to have large quantities of liquid sitting on the surface. Granted, conditions on Titan are quite different than on Earth. For one thing, it's a lot colder on Titan and the liquids there are various types of hydrocarbons. "Methane is to...
  • New Images Reveal Details of the Trifid Nebula دوشنبه 9 شهریور‌ماه سال 1388 19:02
    The Trifid Nebula . Credit: ESO You'll have no trouble at all enjoying these stunning new images of the Trifid Nebula. This massive star factory is so named for the dark dust bands that trisect its glowing heart, and is a rare combination of three nebula types: reflection, emission and dark nebulae . With these new...
  • Mars Kicking Spirit When She's Down دوشنبه 9 شهریور‌ماه سال 1388 19:01
    The Spirit rover has been stuck in loose soil on Mars for several months now, and just as the rover team is preparing to execute maneuvers to attempt to free Spirit , a dust storm hits. Is Mars an unforgiving planet or what? The amount of electricity generated by the solar panels on Spirit has been declining for the...
  • Astro Art of the Week: Music and the Heavens دوشنبه 9 شهریور‌ماه سال 1388 18:56
    This week's featured Astro Art was created by Universe Today reader Bhavya Mittal. Bhavya calls it "Music combines the soul and the heavens," and explains the image: "On the bottom left is the most dangerous black hole identified till now. On the top right is the Crab Nebula , and below it, as you can...
  • Help Solve the Mystery of Epsilon Aurigae with Citizen Sky دوشنبه 9 شهریور‌ماه سال 1388 18:55
    ESO Online Digitized Sky Survey We've written about Epsilon Aurigae before, but this mysterious star is just now beginning to dim, so we wanted to remind everyone that they can be involved in real science and help solve a mystery! The variable star Epsilon Aurigae is now beginning its puzzling transformation that...
  • Space Shuttle Launch Scrubbed for Wednesday Morning دوشنبه 9 شهریور‌ماه سال 1388 18:53
    Discovery on the launchpad. Credit: NASA TV NASA officially scrubbed the second attempt for launching the STS-128 mission. "The last half an hour or so, a problem cropped up with a fill-and-drain valve in the bottom part of the shuttle, the aft part of the shuttle, related to the liquid hydrogen ," said NASA...
  • NASA Science News for August 21, 2009 دوشنبه 9 شهریور‌ماه سال 1388 18:41
    The agency best known for exploring the vast reaches of space has been exploring some of the vast beaches of Earth – and the results may help protect them. FULL STORY at http://science.nasa.gov/headlines/y2009/21aug_mobilebay.htm?list1035898
  • NASA Science News for August 19, 2009 دوشنبه 9 شهریور‌ماه سال 1388 18:36
    Astronomers are celebrating 10 years of discovery by NASA's Chandra X-ray Observatory . Today's story highlights some of Chandra's most surprising, violent and beautiful images of the high-energy Universe. FULL STORY at http://science.nasa.gov/headlines/y2009/19aug_chandra10.htm?list1035898
  • Planck Starts Collecting Light Left Over From Big Bang دوشنبه 26 مرداد‌ماه سال 1388 21:14
    Artists concept of the Planck spacecraft. Credit: JPL As of August 13, 2009, the Planck mission is officially in business. It is now seeing light billions of years old, left over from the Big Bang. From its location in the L2 point, the spacecraft started collecting science data as part of the "First Light...
  • NASA Science News for August 14, 2009 دوشنبه 26 مرداد‌ماه سال 1388 21:10
    A powerful cosmic ray detector to be installed on the International Space Station will search for antimatter galaxies and other exotic phenomena in the Universe. FULL STORY at http://science.nasa.gov/headlines/y2009/14aug_ams.htm?list1035898
  • NASA Doesn't Receive Enough Money for Mandated Asteroid Search دوشنبه 26 مرداد‌ماه سال 1388 21:08
    In 2005, the US Congress mandated that NASA discover 90 percent of all near- Earth objects 140 meters in diameter or greater by 2020. But they forgot one minor detail: Congress or the administration did not request or appropriate any new funds to meet this objective, and with NASA's existing budget, there is no way...
  • Hunt for Supernovae With Galaxy Zoo دوشنبه 26 مرداد‌ماه سال 1388 21:07
    How would you like to find a supernova ? I can't think of anyone who wouldn't be proud to say they have spotted an exploding star. And now, perhaps you can – and without all the work of setting up your telescope and staying up all night (well, that can be fun, too, but…). The great folks who brought you Galaxy Zoo...
  • Trigger-Happy Star Formation in Cepheus B دوشنبه 26 مرداد‌ماه سال 1388 21:05
    Cepheus B from Chandra and Spitzer: X-ray (NASA/CXC/PSU/K. Getman et al.); IR (NASA/JPL-Caltech/CfA/J. Wang et al.) Combining data from the Chandra X-Ray Observatory and the Spitizer Space Telescope allowed astronomers to create this gorgeous new image of Cepheus B. Besides being incredible eye candy, the new image...
  • Variability in Type 1A Supernovae Has Implications for Studying دوشنبه 26 مرداد‌ماه سال 1388 21:02
    The discovery of dark energy , a mysterious force that is accelerating the expansion of the universe , was based on observations of type 1a supernovae , and these stellar explosions have long been used as " standard candles " for measuring the expansion. But not all type 1A supernovae are created equal. A...