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Keyword: craters

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  • A.I. spots thousands of unidentified craters on the moon

    03/17/2018 12:40:37 PM PDT · by Swordmaker · 37 replies
    Digital Trends ^ | March 16, 2018 - 2:18PM | By Dyllan Furness
    Image: NASA’s Goddard Space Flight Center The moon is under constant bombardment by meteorites and asteroids that can leave massive craters on its surface. The Aitken basin, the largest impact crater on the lunar surface, has a diameter equivalent to the distance from London to Athens, Greece. But not all craters are so noticeable — most are relatively insignificant. Thousands of previously unknown craters have been spotted on the moon thanks to an artificial intelligence program designed by researchers at the University of Toronto. “We created an A.I. powered method that autocratically identifies craters on the surface of the moon,...
  • About Those “Polar Lava Tubes”

    01/17/2018 7:58:00 PM PST · by MtnClimber · 27 replies
    AIRSPACEMAG.COM ^ | 16 Jan, 2018 | Paul D. Spudis
    When is a discovery not a discovery? When it’s just plain wrong. or decades, the idea of useable caves on the Moon has been studied and discussed at various venues and science gatherings. Our fascination with the availability of underground planetary structures stems from the possible benefits such features may afford humans trying to live in an off-world, hostile environment. Humans are vulnerable on the Moon because it lacks the protective atmosphere and magnetosphere that we enjoy here on Earth. A thick layer of solid rock provides protection for people and equipment from galactic cosmic rays and solar particle events,...
  • Hundreds of giant 12,000 year-old craters caused by methane blow-outs found on the Arctic...

    06/03/2017 5:17:31 PM PDT · by BenLurkin · 33 replies
    DailyMailUK ^ | Jun 01, 2017
    Researchers have discovered hundreds of huge craters, with many over 3,000 feet wide, on the seafloor of the Arctic Ocean. The craters in the Barents Sea, north of Norway and Russia, formed through huge mounds full of methane exploding suddenly and catastrophically around 12,000 years ago, and are still leaking methane. Scientists say the discovery could help explain why so many craters have appeared in Siberia over recent decades, with the same processes causing these explosive events. ... he Arctic ocean floor hosts vast amounts of methane trapped as hydrates, which are ice-like, solid mixtures of gas and water. These...
  • Astronomy Picture of the Day -- Messier Craters in Stereo

    05/30/2015 3:06:55 AM PDT · by SunkenCiv · 6 replies
    NASA ^ | May 30, 2015 | (see photo credit)
    Explanation: Many bright nebulae and star clusters in planet Earth's sky are associated with the name of astronomer Charles Messier, from his famous 18th century catalog. His name is also given to these two large and remarkable craters on the Moon. Standouts in the dark, smooth lunar Sea of Fertility or Mare Fecunditatis, Messier (left) and Messier A have dimensions of 15 by 8 and 16 by 11 kilometers respectively. Their elongated shapes are explained by an extremely shallow-angle trajectory followed by the impactor, moving left to right, that gouged out the craters. The shallow impact also resulted in two...
  • NASA Shows Far Side of Moon As Never Seen Before

    02/08/2015 11:32:19 AM PST · by Libloather · 41 replies
    Wall Street Journal via MSN ^ | 2/07/15 | Monika Auger
    NASA has published a video that shows the far side of the moon as never seen before.
  • Mystery Behind Giant Hole in Siberia Clearer as 2nd Discovered

    07/22/2014 4:57:04 PM PDT · by nickcarraway · 66 replies
    The Moscow Times ^ | Jul. 22 2014
    The craters, believed to be formed by an underground explosion, are now filled with snow and ice. Reindeer herders in Russia's Far North have discovered yet another mysterious giant hole about 30 kilometers away from a similar one found days earlier. Located in the permafrost of the subarctic Siberian region of Yamal, which means "end of the earth" in the local Nenets language, both craters appear to have been formed in recent years and have icy lakes at their bases. Scientists who examined the first hole theorized that it could have been created when a mixture of water, salt and...
  • Lasers Uncover Craters

    12/03/2008 8:30:16 PM PST · by neverdem · 14 replies · 945+ views
    ScienceNOW Daily News ^ | 1 December 2008 | Phil Berardelli
    Enlarge ImageUnmasked. Aircraft LIDAR sweeps found this previously hidden impact crater in central Alberta, Canada. Credit: Herd et al., Geology Researchers have uncovered a pond-sized crater in the woods of central Alberta, Canada, carved out by a meteor that slammed into Earth about 1100 years ago. The technique they used to pinpoint the pit--a laser take on radar--figures to help scientists find evidence of hundreds of similar impacts that have remained hidden until now. Every 10 years or so, a sizable chunk of asteroid or comet crashes to Earth, leaving a crater about 40 meters wide. The remnants of...
  • The Carolina bays: Explaining a cosmic mystery PART ONE OF THREE

    09/07/2008 6:57:55 PM PDT · by baynut · 63 replies · 590+ views
    The Virginian-Pilot ^ | September 7, 2008 | Dianne Tennant
    ELIZABETH CITY, N.C. The morning began with a brief but vigorous argument - call it a discussion - in the hotel lobby. The breakfast table was loaded with road maps, Google Earth printouts and colorful elevation images intended to help the three researchers locate a curious landscape feature. They were hunting for slight depressions in the earth, dimples almost invisible at ground level but so striking from the air that, for a number of years, they captivated the entire country. Scientists in the mid-1900s devoted careers to their study, debated furiously in print, were celebrated, vilified, laughed at and honored,...
  • Soldiers Patch Roads After Bomb Blasts (ESSAYONS!)

    05/01/2008 4:38:50 PM PDT · by SandRat · 4 replies · 126+ views
    American Forces Press Service ^ | Sgt. Henry Bauer, USA
    CAMP TAJI, Iraq, May 1, 2008 – Craters from roadside bombs can be found throughout the thousands of miles of roadway that cover Baghdad and the surrounding areas. Army Spc. Robert Fancher, from Grenada, Miss., uses a hand trowel to smooth out the edges of the concrete with the adjoining roadway while performing rapid crater repair in northwestern Baghdad. U.S. Army photo by Sgt. Henry Bauer, Multinational Division Baghdad  (Click photo for screen-resolution image);high-resolution image available. When the attacks occur, it’s time for the soldiers of 230th Concrete Team to “pour” into action. The team is based out of Purvis,...
  • Geology Picture of the Week, April 13-19, 2008: Harrat Khaybar Volcanic Field

    04/16/2008 1:00:08 PM PDT · by cogitator · 12 replies · 122+ views
    NASA Earth Observatory ^ | 04/14/2008 | NASA
    Just a cool-looking shot from space.
  • Crater Could Solve 1908 Tunguska Meteor Mystery

    06/27/2007 6:16:57 PM PDT · by raygun · 52 replies · 2,353+ views
    Space.com ^ | 06:27 26 June 2007 ET | By Dave Mosher - Staff Writer
    In late June of 1908, a fireball exploded above the remote Russian forests of Tunguska, Siberia, flattening more than 800 square miles of trees. Researchers think a meteor was responsible for the devastation, but neither its fragments nor any impact craters have been discovered. Astronomers have been left to guess whether the object was an asteroid or a comet, and figuring out what it was would allow better modeling of potential future calamities. Italian researchers now think they've found a smoking gun: The 164-foot-deep Lake Cheko, located just 5 miles northwest of the epicenter of destruction. "When we looked at...
  • New close-up of Hyperion, weird Saturn moon (links to others)

    12/07/2005 8:32:47 AM PST · by cogitator · 5 replies · 493+ views
    NASA/JPL ^ | 12/07/2005 | Cassini
    Click on the small picture above for a 265 kB JPEG image.
  • Antarctic Craters Reveal Strike

    08/23/2004 6:58:34 AM PDT · by blam · 114 replies · 2,289+ views
    BBC ^ | 8-23-2004
    Antarctic craters reveal strike The asteroid may have raised sea levels by up to 60cm Scientists have mapped enormous impact craters hidden under the Antarctic ice sheet using satellite technology. The craters may have either come from an asteroid between 5 and 11km across that broke up in the atmosphere, a swarm of comets or comet fragments. The space impacts created multiple craters over an area of 2,092km (1,300 miles) by 3,862km (2,400 miles). The scientists told a conference this week that the impacts occurred roughly 780,000 years ago during an ice age. When the impacts hit, they would have...
  • Astronomy Picture of the Day 07-10-04

    07/10/2004 3:35:07 AM PDT · by petuniasevan · 2 replies · 607+ views
    NASA ^ | 07-10-04 | Robert Nemiroff and Jerry Bonnell
    Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2004 July 10 Phoebe Craters in Stereo Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA(Stereo image by Patrick Vantuyne) Explanation: Get out your red/blue glasses and gaze across the spectacular, cratered terrain of Saturn's icy moon Phoebe in stereo. The dramatic 3-D perspective spans roughly 50 kilometers and is based on two raw, uncalibrated images (N00004840.jpg and N00004838.jpg) from the Cassini spacecraft's narrow angle camera taken during the...
  • Deep faults and disrupted crater at Acheron Fossae

    05/07/2004 9:02:55 AM PDT · by ckilmer · 2 replies · 105+ views
    News   Deep faults and disrupted crater at Acheron Fossae  (1) Acheron Fossae horsts and grabens in colour 7 May 2004These images were taken by the High Resolution Stereo Camera (HRSC) on board ESA’s Mars Express of the Acheron Fossae region, an area of intensive tectonic (continental ‘plate’) activity in the past. The images show traces of enormous stress and corresponding strain in the crust of the Red Planet. The HRSC was pointed twice at this interesting geological feature in the Acheron Fossae mountain range, during orbits 37 and 143.    (2) Acheron Fossae horsts and grabens (black/white) The feature is...
  • More on Mars "blueberries" -- Opportunity will head to big crater!

    03/22/2004 2:13:13 PM PST · by cogitator · 27 replies · 185+ views
    Space Daily ^ | March 18, 2004
    Mineral In Mars 'Berries' Adds To Water Story CAPTION This microscopic image, taken at the outcrop region dubbed "Berry Bowl" near the Mars Exploration Rover Opportunity's landing site, shows the sphere-like grains or "blueberries" that fill Berry Bowl. Of particular interest is the blueberry triplet, which indicates that these geologic features grew in pre-existing wet sediments. Other sphere-like grains that form in the air, such as impact spherules or ejected volcanic material called lapilli, are unlikely to fuse along a line and form triplets. This image was taken by the rover's microscopic imager on the 46th martian day, or sol,...
  • Scientists Uncover 'Deep Impact' Disaster From Space

    06/13/2003 6:10:30 PM PDT · by blam · 34 replies · 609+ views
    Ananova ^ | 6-12-2003
    Scientists uncover 'deep impact' disaster from spaceA new report suggests that a massive object from space smashed into what is now the Moroccan desert 380 million years ago, wiping out 40% of the world's marine species. The discovery adds to the evidence linking such impacts with mass extinction events. Only one other impact by a large comet or asteroid has convincingly been held responsible for a mass extinction. That occurred off the Yucatan peninsular in Mexico 65 million years ago and is thought to have ended the reign of the dinosaurs. The newly discovered impact coincided with the Kacak/otomari extinction,...
  • Meteor Clue To End Of Middle East Civilisations

    06/08/2003 7:17:12 PM PDT · by blam · 81 replies · 1,393+ views
    The Telegraph (UK) ^ | 4-11-2001 | Robert Matthews
    Meteor clue to end of Middle East civilisations By Robert Matthews, Science Correspondent (Filed: 04/11/2001) SCIENTISTS have found the first evidence that a devastating meteor impact in the Middle East might have triggered the mysterious collapse of civilisations more than 4,000 years ago. satellite images of southern Iraq have revealed a two-mile-wide impact crater caused by a meteor Studies of satellite images of southern Iraq have revealed a two-mile-wide circular depression which scientists say bears all the hallmarks of an impact crater. If confirmed, it would point to the Middle East being struck by a meteor with the violence equivalent...
  • Mass-extinction controversy flares again (Chicxulub crater kills dinosaurs, or not?)

    04/11/2003 2:34:46 PM PDT · by SteveH · 29 replies · 1,280+ views
    Nature ^ | 10 April 2003 | Rex Dalton
    EGS-AGU-EUG Joint Assembly, Nice, April 2003 Mass-extinction controversy flares again Core from asteroid crater fuels debate on what wiped out the dinosaurs. 10 April 2003 REX DALTON [photo] The dinosaurs were wiped out 65 million years ago. © alamy.com A claim that the asteroid that struck Mexico 65 million years ago did not cause the mass extinction that wiped out dinosaurs triggered heated debate at a meeting this week. The announcement is based on preliminary analysis of the first core drilled into the 185-kilometre Chicxulub asteroid crater near the Yucatan Peninsula. Gerta Keller of Princeton University in New Jersey says...
  • Maine Crater Related to Dino-Killer Asteroid?

    04/05/2003 9:39:18 PM PST · by SteveH · 19 replies · 493+ views
    Discovery News ^ | April 3, 2003 | Larry O'Hanlon
    Maine Crater Related to Dino-Killer Asteroid? By Larry O'Hanlon, Discovery News April 3, 2003 — The evidence is still skimpy, but there is a chance that the dino killer asteroid was not alone when it walloped the Earth 65 million years ago. A possible second crater, at least as big or bigger than the famous Chicxulub crater off Mexico's Yucatan peninsula, may have been created by a second hit moments after Chicxulub and off the coast of Maine. "It probably is a crater, but we really don't have age data," said marine geologist Dallas Abbott Lamont-Doherty Earth Observatory at Columbia...