Space

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  • honeybee__12
    honeybee__12 Posts: 15,688 Member
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    As seen from the Hubble telescope.
    NGC-1032 a spectacular spiral galaxy.
    Seen from Earth the galaxy's vast disk of gas, dust and stars is seen nearly
    edge-on.
    It is located in the constellation Cetus, 100mm light years away
  • honeybee__12
    honeybee__12 Posts: 15,688 Member
    Saturn’s rings, photo taken by Voyager
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  • cee134
    cee134 Posts: 33,711 Member
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    This image shows our planet's Moon as seen from the International Space Station.
  • cee134
    cee134 Posts: 33,711 Member
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    The dwarf galaxy NGC 4214 is ablaze with young stars and gas clouds. Located around 10 million light-years away in the constellation of Canes Venatici (The Hunting Dogs), the galaxy's close proximity, combined with the wide variety of evolutionary stages among the stars, make it an ideal laboratory to research the triggers of star formation and evolution. Intricate patterns of glowing hydrogen formed during the star-birthing process, cavities blown clear of gas by stellar winds, and bright stellar clusters of NGC 4214 can be seen in this optical and near-infrared image. Observations of this dwarf galaxy have also revealed clusters of much older red supergiant stars.

    Additional older stars can be seen dotted all across the galaxy. The variety of stars at different stages in their evolution indicates that the recent and ongoing starburst periods are not the first, and the galaxy's abundant supply of hydrogen means that star formation will continue into the future.

    This color image was taken using the Wide Field Camera 3 in December 2009.
  • cee134
    cee134 Posts: 33,711 Member
    Hubble Captures Cluster of Aging Stars

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    This rich and dense smattering of stars is a massive globular cluster, a gravitationally bound collection of stars that orbits the Milky Way.
  • honeybee__12
    honeybee__12 Posts: 15,688 Member
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  • cee134
    cee134 Posts: 33,711 Member
    The Heart of Madagascar

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    As the International Space Station flew overhead, NASA astronaut Ricky Arnold captured this photograph of a changing landscape in the heart of Madagascar, observing drainage into the sea in the Betsiboka Estuary due to decimation of rainforests and coastal mangroves.
  • cee134
    cee134 Posts: 33,711 Member
    X'-ploring the Eagle Nebula and 'Pillars of Creation'

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    The Eagle Nebula, also known as Messier 16, contains the young star cluster NGC 6611. It also the site of the spectacular star-forming region known as the Pillars of Creation, which is located in the southern portion of the Eagle Nebula.
  • honeybee__12
    honeybee__12 Posts: 15,688 Member
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  • honeybee__12
    honeybee__12 Posts: 15,688 Member
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  • honeybee__12
    honeybee__12 Posts: 15,688 Member
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    This image from NASA's Mars Reconnaissance Orbiter, acquired May 13, 2018 during winter at the South Pole of Mars, shows a carbon dioxide ice cap covering the region and as the sun returns in the spring, "spiders" begin to emerge from the landscape.

    But these aren't actual spiders. Called "araneiform terrain," describes the spider-like radiating mounds that form when carbon dioxide ice below the surface heats up and releases. This is an active seasonal process not seen on Earth. Like dry ice on Earth, the carbon dioxide ice on Mars sublimates as it warms (changes from solid to gas) and the gas becomes trapped below the surface.

    Over time the trapped carbon dioxide gas builds in pressure and is eventually strong enough to break through the ice as a jet that erupts dust. The gas is released into the atmosphere and darker dust may be deposited around the vent or transported by winds to produce streaks. The loss of the sublimated carbon dioxide leaves behind these spider-like features etched into the surface.
  • cee134
    cee134 Posts: 33,711 Member
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    Neutrino Associated with Distant Blazar Jet
    Illustration Credit: DESY, Science Communication Lab

    With equipment frozen deep into ice beneath Earth's South Pole, humanity appears to have discovered a neutrino from far across the universe. If confirmed, this would mark the first clear detection of cosmologically-distant neutrinos and the dawn of an observed association between energetic neutrinos and cosmic rays created by powerful jets emanating from blazing quasars (blazars).

    Once the Antarctican IceCube detector measured an energetic neutrino in 2017 September, many of humanity's premier observatories sprang into action to try to identify a counterpart in light. And they did. An erupting counterpart was pinpointed by high energy observatories including AGILE, Fermi, HAWC, H.E.S.S., INTEGRAL, NuSTAR, Swift, and VERITAS, which found that gamma-ray blazar TXS 0506+056 was in the right direction and with gamma-rays from a flare arriving nearly coincidental in time with the neutrino. Even though this and other position and time coincidences are statistically strong, astronomers will await other similar neutrino - blazar light associations to be absolutely sure.

    Pictured here is an artist's drawing of a particle jet emanating from a black hole at the center of a blazar.
  • cee134
    cee134 Posts: 33,711 Member
    Meteors over Inner Mongolia

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    Did you ever get caught in a meteor shower? If yes, then every minute or so the sky sparked with fleeting flashes of light. This was the fate of the pictured astrophotographer during last year's Perseids meteor shower. During the featured three-hour image composite, about 90 Perseids rained down above Lake Duolun of Inner Mongolia, China.

    If you trace back the meteor streaks, you will find that most of them appear to radiate from a single constellation -- in this case Perseus. In fact, you can even tell which meteors are not Perseids because they track differently. Tonight promises to be another good night to get caught in a meteor shower because it is the peak for the Geminids. Gemini, the shower radiant, should rise shortly after sunset and be visible most of the night.
  • cee134
    cee134 Posts: 33,711 Member
    A Merger of Stars

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    Launched 15 years ago, the Spitzer Space Telescope has made many discoveries, including this detection of the merger of two neutron stars.
  • honeybee__12
    honeybee__12 Posts: 15,688 Member
    Neptune the windiest planet as captured by Voyager 2 in 1989. (image Credit: Voyager 2, NASA)
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  • cee134
    cee134 Posts: 33,711 Member
    Churning in the Chukchi Sea

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    Regardless of the amount of winter ice cover, the waters off of the Alaskan coast usually come alive each spring with blooms of phytoplankton.
  • cee134
    cee134 Posts: 33,711 Member
    Dark Slope Streaks Split on Mars

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    What is creating these dark streaks on Mars? No one is sure. Candidates include dust avalanches, evaporating dry ice sleds, and liquid water flows. What is clear is that the streaks occur through light surface dust and expose a deeper dark layer.

    Similar streaks have been photographed on Mars for years and are one of the few surface features that change their appearance seasonally. Particularly interesting here is that larger streaks split into smaller streaks further down the slope.

    The featured image was taken by the HiRISE camera on board the Mars-orbiting Mars Reconnaissance Orbiter (MRO) several months ago. Currently, a global dust storm is encompassing much of Mars.
  • honeybee__12
    honeybee__12 Posts: 15,688 Member
    edited July 2018
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  • cee134
    cee134 Posts: 33,711 Member
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    This HiRISE image from NASA's Mars Reconnaissance Orbiter (MRO) captures a new, dated (within about a decade) impact crater that triggered a slope streak.
  • cee134
    cee134 Posts: 33,711 Member
    This Day in History: July 20, 1969: Armstrong walks on moon

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