|  Swinburne Astronomy Productions | |
| | A gamma-ray burst hints that LIGO's double black holes started as one massive starIn order to power both the gravitational wave event and the gamma-ray burst, the twin black holes must have been born close together, with an initial separation of order the size of the Earth, and merged within minutes. |
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|  LIGO | |
| | LIGO-India gets the green lightThe latest ground-based gravitational-wave detector will allow scientists to figure out where these ripples in space-time are coming from. |
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|  NASA/JHU-APL/SwRI | |
| | Pluto’s largest moon may have once had an oceanIt’s possible that Charon once had a subsurface ocean that has long since frozen and expanded. |
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|  Jeremy Teaford/Vanderbilt University | |
| | Longest-lasting stellar eclipse discoveredThe newly discovered system sets a record for both the longest duration stellar eclipse and the longest period between eclipses in a binary system. |
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| | | Issue Preview VideoThe historic journey to Europa and more!This month's issue of Astronomy magazine explores the long-awaited mission to Europa, catches up on two trips to mine asteroid secrets, untangles the magnetic universe, explains the best ways to image Jupiter, and more.
Subscribe today to begin receiving your own copy of Astronomy magazine! |
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| | LOCAL GROUPBecome an OSIRIS-REx AmbassadorWhile no human can ride along with the OSIRIS-REx spacecraft, ambassadors hitch a ride by learning and sharing along the way. |
| | DAVE’S UNIVERSETake the Asteroid Day Chelyabinsk quiz!What to do on a winter day? How about testing your skills on the Chelyabinsk meteorite fall of 2013? |
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| | SEASONAL OBSERVINGWinter observing targets for small telescopesAstronomy magazine Senior Editor Michael E. Bakich highlights the objects you can see this winter using a small telescope. Targets include the Crab Nebula, the Eskimo Nebula, open cluster M35, Beta Monocerotis, and more! |
| | THE REAL REALITY SHOWAll about the Drake EquationTo estimate the number of civilizations in the Milky Way, one astronomer took on a mathematical challenge. |
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| |  | Observing PodcastFebruary 25 – March 3The Dish Cluster The Pencil Nebula Spiral Galaxy NGC 2655
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| | February sky highlightsFive bright planets adorn morning during the first half of February. Jupiter, Mars, Saturn, Venus, and Mercury stretch from west to east across the sky an hour before sunrise.
Astronomy magazine subscribers have access to the complete version of February’s The Sky this Month at Astronomy.com. To learn about other daily sky events, visit The Sky this Week. |
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| | PICTURE OF THE DAYThe Pacman Nebula in CassiopeiaMichael Caligiuri from Carlsbad, California, spotted NGC 281, popularly known as the Pacman Nebula. |
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| | SUN AND MOON GALLERYMoon craters Aristoteles and EudoxusUser Edison100 spotted two lovely lunar craters on Valentine’s Day. |
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| | NEBULAE GALLERYThe Elephant Trunk Nebula (IC 1396)User Ezequiel Etcheverry caught a rainbow of colors around IC 1396, the Elephant’s Trunk Nebula. |
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| | Send us your astronomy questionsPerplexed by planets? Confused by cosmology? Baffled by black holes? Then send in your questions. If you have an astronomy question about observing, equipment, the planets, stars, cosmology, or astronomy history, send it in! Astronomy magazine editors select five questions each month for publication in the Ask Astro section of the magazine. If your question is selected, we will forward it to an expert for a response. Then, the question and answer will appear together in a future issue. We may edit or revise your question for clarity. |
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