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E.g., 03/23/2017
Your search has returned 470 images:
  • comet 67P
  • hydrogen signatures of galaxies
  • Pan in Cassini image
Your search has returned 1244 articles:
  • News in Brief

    Close pass by sun didn’t radically alter comet 67P’s landscape

    At least one of comet 67P/Churyumov-Gerasimenko’s dusty outbursts was the result of a landslide. But such changes to the surface of the comet haven’t radically altered its appearance, suggesting it has had roughly the same look for decades — or longer.

    Images from the Rosetta spacecraft taken before its demise show what happened to the comet as it passed close to the sun in 2015. Cliffs...

    03/21/2017 - 10:30 Astronomy, Planetary Science
  • News

    Distant galaxies lack dark matter, study suggests

    Very distant galaxies have surprisingly little dark matter, the invisible stuff thought to make up the bulk of matter in the universe, new observations suggest.

    Stars in the outer regions of some far-off galaxies move more slowly than stars closer to the center, indicating a lack of dark matter, astronomer Reinhard Genzel and colleagues report online March 15 in Nature. If confirmed, the...

    03/15/2017 - 14:00 Astronomy, Cosmology
  • Science Ticker

    In new Cassini portraits, Saturn’s moon Pan looks like pasta

    Saturn serves up the closest thing to space pasta, the latest round of images from NASA’s Cassini probe, released March 9, show.

    On March 7, the spacecraft snapped a series of portraits of Pan, Saturn’s small moon that orbits within a 325-kilometer gap in one of the planet’s rings. Taken at a distance of 24,572 kilometers from the moon, these are the closest images of Pan to date.

    ...

    03/10/2017 - 17:30 Astronomy
  • News

    Astronomers detect oldest known stardust in distant galaxy

    Astronomers may have spotted some of the earliest stardust ever created in the cosmos.

    Astrophysicist Nicolas Laporte of University College London and colleagues detected the dust in a galaxy seen as it was when the universe was only 600 million years old. “We are probably seeing the first stardust of the universe,” Laporte says. The observations, published online March 8 in the...

    03/08/2017 - 06:00 Astronomy, Cosmology
  • News

    Magnetism helps black holes blow off gas

    Black holes are a bit like babies when they eat: Some food goes in, and some gets flung back out into space. Astronomers now say they understand how these meals become so messy — and it’s a trait all black holes share, no matter their size.

    Magnetic fields drive the turbulent winds that blow gas away from black holes, says Keigo Fukumura, an astrophysicist at James Madison University in...

    03/06/2017 - 11:00 Astronomy
  • Science Ticker

    Rare triplet of high-energy neutrinos detected from an unknown source

    Three high-energy neutrinos have been spotted traveling in tandem.

    The IceCube Neutrino Observatory in Antarctica detected the trio of lilliputian particles on February 17, 2016. This is the first time the experiment has seen a triplet of neutrinos that all seemed to come from the same place in the sky and within 100 seconds of one another. Researchers report the find February 20 on...

    03/03/2017 - 13:20 Particle Physics, Astronomy
  • News in Brief

    Hydrogen volcanoes might boost planets’ potential for life

    Volcanoes that belch hydrogen could bump up the number of potentially habitable planets in the universe.

    Ramses Ramirez and Lisa Kaltenegger, both of Cornell University, modeled the atmospheres of planets blemished with hydrogen-spewing volcanoes. These gaseous eruptions could warm planets and ultimately widen a star’s habitable zone, the region where liquid water can exist on a planet’s...

    03/02/2017 - 07:00 Exoplanets, Astronomy
  • The –est

    Black hole enjoys fantastically long stellar feast

    Black holes are speed eaters, usually scarfing down a star in less than a year. But a supermassive black hole in a galaxy about 1.8 billion light-years away has been gorging on a single star for more than 10 years – longer than any other observed supermassive black hole meal.

    Astronomers detected the extraordinary feast in X-ray images from ESA’s XMM-Newton spacecraft and NASA’s...

    02/27/2017 - 09:00 Astronomy
  • News

    Seven Earth-sized planets orbit nearby supercool star

    A nearby ultracool star harbors seven Earth-sized planets, three with orbits that potentially put them in a habitable zone. That makes the system, around a star called TRAPPIST-1, a prime target in the search for signs of alien life. Its discovery also hints that many more cousins of Earth may be out there than astronomers thought.

    “It’s rather stunning that the system has so many Earth-...

    02/22/2017 - 13:00 Exoplanets, Astronomy
  • Science Ticker

    Juno spacecraft won’t go into shorter orbit around Jupiter

    NASA’s Juno spacecraft will stay in its current 53-day orbit around Jupiter instead of closing into a 14-day orbit as originally planned, the Juno team announced February 17.

    An issue with two helium check valves, which are tied to the spacecraft’s main engine, had scientists concerned. The valves took several minutes to open when the team pressurized the spacecraft’s propulsion system...

    02/17/2017 - 16:02 Planetary Science, Astronomy