Space

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  • honeybee__12
    honeybee__12 Posts: 15,688 Member
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    Halley's Comet, photo taken from Easter Island 1986.
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  • cee134
    cee134 Posts: 33,711 Member
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    Have you seen a panorama from another world lately? Assembled from high-resolution scans of the original film frames, this one sweeps across the magnificent desolation of the Apollo 11 landing site on the Moon's Sea of Tranquility. The images were taken by Neil Armstrong looking out his window of the Eagle Lunar Module shortly after the July 20, 1969 landing.

    The frame at the far left (AS11-37-5449) is the first picture taken by a person on another world. Toward the south, thruster nozzles can be seen in the foreground on the left, while at the right, the shadow of the Eagle is visible to the west. For scale, the large, shallow crater on the right has a diameter of about 12 meters. Frames taken from the Lunar Module windows about an hour and a half after landing, before walking on the lunar surface, were intended to initially document the landing site in case an early departure was necessary.
  • cee134
    cee134 Posts: 33,711 Member
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    Planck Maps the Microwave Background

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    What is our universe made of? To help find out, ESA launched the Planck satellite from 2009 to 2013 to map, in unprecedented detail, slight temperature differences on the oldest optical surface known -- the background sky when our universe first became transparent to light. Visible in all directions, this cosmic microwave background is a complex tapestry that could only show the hot and cold patterns observed were the universe to be composed of specific types of energy that evolved in specific ways.

    The final results, reported last week, confirm again that most of our universe is mostly composed of mysterious and unfamiliar dark energy, and that even most of the remaining matter energy is strangely dark. Additionally, the "final" 2018 Planck data impressively peg the age of the universe at about 13.8 billion years and the local expansion rate -- called the Hubble constant -- at 67.4 (+/- 0.5) km/sec/Mpc. Oddly, this early-universe determined Hubble constant is slightly lower than that determined by other methods in the late-universe, creating a tension that is causing much discussion and speculation.
  • cee134
    cee134 Posts: 33,711 Member
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    In July 2018, an iceberg weighing 11 million tons parked just offshore of Innaarsuit, a small island village in northwestern Greenland. Ground-based photographs show its impressive height as it towered over the small village.

    “This is absolutely beautiful,” said Kelly Brunt, a glaciologist at NASA’s Goddard Space Flight Center. “The z dimension (height) is pretty extreme.” When viewed from space, however, the iceberg is like a “Where’s Waldo?” puzzle, becoming lost in a sea of similar looking bergs. On July 5, 2018, the Operational Land Imager (OLI) on Landsat 8 acquired this natural-color image of the area.
    Large icebergs, in terms of width and length, are common in Baffin Bay. And most of them usually move along a path that keeps them out of the harbor. But it is the height and position of the berg that poses potential trouble for Innaarsuit.

    “Bergs pose a threat when they sluff off chunks of ice,” Brunt said. “The waves that are created from this process could be quite large and could inundate the inhabited coast.”

    “If the iceberg’s z dimension (height) is large relative to the x and y dimension, the ice could roll,” Brunt added. “The sides of tall icebergs like this often have a series of complex water lines, suggesting that they have experienced a complex history of shifting and rolling slightly as they change shape. A big roll could be pretty scary, and could create a substantial wave.”
  • cee134
    cee134 Posts: 33,711 Member
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    If you go high enough, you may find yourself on a picturesque perch between the water clouds of the Earth and the star clouds of the Milky Way. Such was the case last month for one adventurous alpinist astrophotographer. Captured here in the foreground above white clouds are mountain peaks in the Dolomite range in northern Italy.

    This multi-exposure image was captured from Lagazuoi, one of the Dolomites. Hundreds of millions of years ago, the Dolomites were not mountains but islands an ancient sea that rose through colliding tectonic plates. The Dolomites divergent history accounts for its unusually contrasting features, which include jagged crests and ancient marine fossils.

    High above even the Dolomites, and far in the distance, dark dust lanes streak out from the central plane of our Milky Way Galaxy. The stars and dust are dotted with bright red clouds of glowing hydrogen gas -- such as the Lagoon Nebula just above and to the left of center.
  • cee134
    cee134 Posts: 33,711 Member
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    (May 5, 2018) --- The SpaceX Dragon cargo craft is pictured in the grips of the Canadarm2 robotic arm as the International Space Station was orbiting above northern Africa. Dragon would be released a few hours later for its splashdown in the Pacific Ocean off the coast of California on May 5, 2018 ending the SpaceX CRS-14 mission.
  • honeybee__12
    honeybee__12 Posts: 15,688 Member
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    Framed by a circle of clouds, this is a stunning illustration of Nature's powerful force.
    A plume of smoke, ash and steam soars five miles into the sky from an erupting volcano.
    The extraordinary image was captured by the crew of the International Space Station 220 miles above a remote Russian island in the North Pacific.

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  • cee134
    cee134 Posts: 33,711 Member
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    LMNOP55 wrote: »
    A hot space nerd as telling me about some launches this week.

    Tell her I don't believe her and she will have to prove it.
  • cee134
    cee134 Posts: 33,711 Member
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    Hubble Reveals a Cosmic Distortion

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    The mind-bending distortions visible in this impressive Hubble image are actually caused by a cosmic phenomenon.
  • cee134
    cee134 Posts: 33,711 Member
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    The longest total lunar eclipse of the century arrives Friday night, showcasing a blood moon for most of the Eastern Hemisphere. Coincidentally, Mars is also at its brightest, putting two bright red objects in our sky.

    The lunar eclipse happens during daylight hours for those in the Western Hemisphere, so people in North America will miss it.

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    This full moon in July is also known as the Full Buck Moon and the Thunder Moon, occurring when a male deer's antlers are in full growth and at a time of frequent thunderstorms, according to the Old Farmer's Almanac.

    The Royal Astronomical Society said Mars and the moon will appear low in the sky for everyone in the UK, so a location with an unobstructed southeastern horizon will afford the best view.

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  • cee134
    cee134 Posts: 33,711 Member
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    The Virtual Telescope Project will share a live stream of the lunar eclipse and Mars at its brightest just a few degrees apart above the skyline of Rome. Slooh, a robotic telescope service, will also live stream the eclipse beginning at 1 p.m. Eastern time and ending at 7:30 p.m. Eastern time.

    https://www.virtualtelescope.eu/2018/06/01/the-night-of-the-red-moon-and-the-red-planet-the-total-lunar-eclipse-and-planet-mars-color-the-starry-sky-27-july-2018/
  • cee134
    cee134 Posts: 33,711 Member
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    Hubble Takes Portrait of Opulent Ring World

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    Saturn is the solar system’s most photogenic planet, especially in this latest Hubble snapshot with the ring system near its maximum tilt.
  • honeybee__12
    honeybee__12 Posts: 15,688 Member
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  • cee134
    cee134 Posts: 33,711 Member
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    The International Space Station soars into a sunrise every 90 minutes, each and every day.
  • cee134
    cee134 Posts: 33,711 Member
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    Hubble Images Milky Way’s Big Sister

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    This Hubble image shows a beautiful spiral galaxy called NGC 6744. At first glance, it resembles our Milky Way albeit larger, measuring more than 200,000 light-years across compared to a 100,000-light-year diameter for our home galaxy.
  • ChaelAZ
    ChaelAZ Posts: 2,240 Member
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    If you are interested, Sandage is an amazing study of astrophysics and a true pioneer in the field. For the longest time his workwith Hubble in giving a estimate for the age of the universe put him at odds with the scientific community at large, but the Hubble Constant is now widely accepted as one of closest estiamtes, and very close to Sandage's 1958 work. But he had many other contributions so well worth reading about and everything done at the Mount Wilson Observatory.
  • cee134
    cee134 Posts: 33,711 Member
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    Eclipse over the Gulf of Poets

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    The total phase of the July 27 lunar eclipse lasted for an impressive 103 minutes. That makes it the longest total lunar eclipse of the 21st century. The Moon passed through the center of Earth's shadow while the Moon was near apogee, the most distant point in its elliptical orbit. From start to finish, the entire duration of totality is covered in this composite view. A dreamlike scene, it includes a sequence of digital camera exposures made every three minutes.

    The exposures track the totally eclipsed lunar disk, accompanied on that night by bright planet Mars, as it climbs above the seaside village of Tellaro, Italy. In the foreground lies the calm mediteranean Gulf of La Spezia, known to some as the Gulf of Poets. In the 3rd century BCE, heliocentric astronomer Aristarchus also tracked the duration of lunar eclipses, though without the benefit of digital clocks and cameras. Using geometry he devised a way to calculate the Moon's distance from the eclipse duration, in terms of the radius of planet Earth.
  • JetJaguar
    JetJaguar Posts: 801 Member
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    LMNOP55 wrote: »
    From a space standpoint, what is underneath the earth?

    Turtles, all the way down.