Keyword: nasa

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  • US detects huge meteor explosion [December]

    03/18/2019 8:51:47 AM PDT · by BenLurkin · 27 replies
    BBC ^ | 18 March 2019 | Paul Rincon
    A huge fireball exploded in the Earth's atmosphere in December, according to Nasa. The blast was the second largest of its kind in 30 years, and the biggest since the fireball over Chelyabinsk in Russia six years ago. But it went largely unnoticed until now because it blew up over the Bering Sea, off Russia's Kamchatka Peninsula. The space rock exploded with 10 times the energy released by the Hiroshima atomic bomb. Lindley Johnson, planetary defence officer at Nasa, told BBC News a fireball this big is only expected about two or three times every 100 years. At about noon...
  • There's Something About Space That's Triggering Herpes in Astronauts

    03/17/2019 7:09:26 PM PDT · by DUMBGRUNT · 88 replies
    Science Alert ^ | 18 Mar 2018 | JON CHRISTIAN
    Tests show that dormant herpes viruses reactivate in more than half the astronauts who travel on the Space Shuttle and International Space station, according to new NASA research - a phenomenon the space agency says could pose problems for deep space missions. ..."In keeping with this, we find that astronaut's immune cells - particularly those that normally suppress and eliminate viruses - become less effective during spaceflight and sometimes for up to 60 days after."
  • Dormant viruses activate during spaceflight

    03/17/2019 5:35:03 AM PDT · by BenLurkin · 14 replies ^ | 03/15/2019
    "NASA astronauts endure weeks or even months exposed to microgravity and cosmic radiation—not to mention the extreme G forces of take-off and re-entry," says senior author Dr. Satish K. Mehta of KBR Wyle at the Johnson Space Center. "This physical challenge is compounded by more familiar stressors like social separation, confinement and an altered sleep-wake cycle." "During spaceflight there is a rise in secretion of stress hormones like cortisol and adrenaline, which are known to suppress the immune system. In keeping with this, we find that astronaut's immune cells—particularly those that normally suppress and eliminate viruses—become less effective during spaceflight...
  • NASA weighs shelving Boeing rocket, using other option for flight to moon

    03/15/2019 2:19:14 PM PDT · by BenLurkin · 52 replies
    Seattle Times ^ | 03/13/2018 | Justin Bachman
    The Space Launch System (SLS) “is struggling to meet its schedule,” NASA Administrator Jim Bridenstine said at a Senate hearing Wednesday. The rocket won’t be ready for a launch in June 2020, when NASA had planned the Exploration Mission-1 flight of its Orion spacecraft around the moon. The agency is now exploring options for meeting that deadline using “commercial capabilities,” Bridenstine said. He stressed that the agency remains committed to Boeing’s SLS, the largest rocket in U.S. history and a “critical capability” for future deep-space missions. An October 2018 audit by NASA’s Inspector General found multiple management flaws in the...
  • Soldier, 30, awaiting trial for taking a military vehicle on a joyride was able to fly to IRAQ

    03/14/2019 6:20:13 PM PDT · by blueplum · 24 replies
    The Daily Mail UK ^ | 14 Mar 2019 | Leah McDonald
    Full Title: Soldier, 30, awaiting trial for taking a military vehicle on a joyride was able to fly to IRAQ while wearing an ankle monitor, researched bombs online and posted about Al Qaeda on Twitter A U.S. Army National Guard officer was able to travel to Iraq for two days while wearing an ankle monitor after he was arrested for hijacking an armored car last year. Joshua Yabut broke the terms of his bond agreement by traveling on commercial flights to the Middle East. The 30-year-old soldier was also caught researching bombs online and posting about Al Qaeda on Twitter,...
  • NASA accurately calculates Milky Way's weight using Gaia, Hubble telescopes

    03/09/2019 10:18:12 AM PST · by ETL · 47 replies ^ | Mar 8, 2019 | Ann W. Schmidt | Fox News
    Scientists have finally been able to accurately calculate the weight of the Milky Way, overcoming the difficult hurdle of measuring dark matter, the European Space Agency (ESA) announced Thursday. After years of struggling to estimate the size of our galaxy, astronomers with NASA and the ESA used data from the Hubble Space Telescope and the ESA’s Gaia mission to determine the Milky Way weighs about 1.5 trillion solar masses within a radius of 129,000 light years from the center. Because dark matter makes up about 90 percent of the galaxy, estimates of the Milky Way’s weight have differed widely in...
  • Splashdown! SpaceX’s Crew Dragon capsule returns to Earth

    03/08/2019 6:29:02 AM PST · by Moonman62 · 31 replies
    Fox News ^ | 3/8/19 | James Rogers
    SpaceX’s unmanned Crew Dragon capsule has splashed down in the Atlantic Ocean after its historic DEMO-1 test flight to the International Space Station. The capsule, carrying a dummy dubbed ‘Ripley,’ made its return to Earth after undocking from the ISS early Friday. After plunging through the Earth’s atmosphere, Crew Dragon deployed its parachutes and splashed down at 8:45 a.m. EST. The six-day test flight is a crucial step in SpaceX’s plan to provide human spaceflight. Lessons learned from DEMO-1 should improve safety when two NASA astronauts strap into a Dragon as early as July.
  • NASA Captures First Air-to-Air Images of Supersonic Shockwave Interaction in Flight

    03/07/2019 9:11:36 PM PST · by LibWhacker · 14 replies
    NASA ^ | 3/5/19 | Matt Kamlet (?)
    March 5, 2019 NASA Captures First Air-to-Air Images of Supersonic Shockwave Interaction in Flight One of the greatest challenges of the flight series was timing. In order to acquire this image, originally monochromatic and shown here as a colorized composite image, NASA flew a B-200, outfitted with an updated imaging system, at around 30,000 feet while the pair of T-38s were required to not only remain in formation, but to fly at supersonic speeds at the precise moment they were directly beneath the B-200. The images were captured as a result of all three aircraft being in the exact...
  • Solar Wind Leaves 'Sunburn' Scars on the Moon

    03/04/2019 2:39:34 PM PST · by ETL · 34 replies ^ | Mar 4, 2019 | Samantha Mathewson
    People on Earth who've gotten sunburns are familiar with the sun's powerful rays — but the moon suffers from sunburn, too. Some regions of the lunar surface exhibit a distinctive pattern of darker and lighter swirls. Using NASA's ARTEMIS mission — which stands for Acceleration, Reconnection, Turbulence and Electrodynamics of the Moon's Interaction with the Sun — astronomers have revealed new clues about the origin of these swirls. The sun releases a constant flow of charged particles known as solar wind into space. While Earth's natural magnetic field deflects solar-wind particles, the moon has a weaker magnetic field, leaving some areas of...
  • NASA, SpaceX Launch First Flight Test of Space System Designed for Crew

    03/03/2019 8:07:40 PM PST · by blueplum · 8 replies
    NASA ^ | 02 Mar 2019 | Press Release
    For the first time in history, a commercially-built and operated American crew spacecraft and rocket, which launched from American soil, is on its way to the International Space Station. The SpaceX Crew Dragon spacecraft lifted off at 2:49 a.m. EST Saturday on the company’s Falcon 9 rocket from Launch Complex 39A at NASA’s Kennedy Space Center in Florida. “Today’s successful launch marks a new chapter in American excellence, getting us closer to once again flying American astronauts on American rockets from American soil,” said NASA Administrator Jim Bridenstine. “I proudly congratulate the SpaceX and NASA teams for this major milestone...
  • Earth is greener today than it was 20 years ago thanks to 'human activity,' NASA study shows

    03/01/2019 7:56:16 AM PST · by ETL · 46 replies ^ | Mar 1, 2019 | Paulina Dedaj | Fox News
    Earth is greener today than it was 20 years ago thanks to 'human activity,' NASA study showsA new findings from NASA revealed that the planet has seen an overall increase in greening over the last 20 years, due mainly in part to “ambitious tree planting programs.” The research published on Feb. 11 found that the greening of earth over the course of the last two decades has shown an overall increase by 5 percent, equal to more than two million square miles of extra green leaf area per year compared to the early 2000s. The data, which compared satellite images from...
  • NASA’s Curiosity Mars Rover Recovers After Serious Glitch

    02/24/2019 5:36:08 PM PST · by BenLurkin · 21 replies
    When Curiosity attempted to come back online after an inactive period — a process it’s completed more than 30 times previously, according to the post — a glitch triggered a “protective safe mode.” Scientists back on Earth are working to forensically reconstruct what happened during the hiccup by downloading a snapshot of its memory. They’re also taking a hiatus from its scientific work — which is frustrating for researchers, pointed out, because they’d been about to drill an “intriguing rock” about 650 feet from the rover’s current location. “In the short term, we are limiting commands to the vehicle...
  • NASA in a hurry to develop landers to take humans to the Moon

    02/19/2019 11:05:45 AM PST · by yandexja · 33 replies
    Info Banquet ^ | FEBRUARY 19, 2019 | Ibadmin
    NASA wants to jump-start development of landers to take humans to the Moon After more than a year of talk about returning humans to the Moon, NASA is asking the aerospace community to come up with designs for landers that can transport astronauts to the lunar surface. NASA’s goal is to test out these vehicles on the Moon as early as 2024 and then use them to take people to the lunar surface by 2028
  • NASA's history-making Mars rover Opportunity declared dead

    02/13/2019 5:29:11 PM PST · by buckalfa · 42 replies
    CNET ^ | February 13, 2019 | Jackson Ryan
    NASA's Opportunity rover, the third robotic wanderer to land on Mars, changed our understanding of the Martian landscape, geology, atmosphere and history. On Wednesday, NASA announced its mission complete and with it, the rover's life officially over. The plucky robot roamed the Martian surface for approximately 5,515 Earth days, just over 15 years. During a press conference, NASA said that Opportunity hadn't responded to a last-ditch effort Tuesday to establish contact. A planet-encircling dust storm cut off communications with Opportunity on June 10, 2018, preventing its solar panels from storing power. Since then, over 830 rescue commands had been beamed...
  • This Is NASA's Plan to Land Astronauts on the Moon in 2028 with Commercial Vehicles

    02/15/2019 11:00:49 AM PST · by Red Badger · 27 replies ^ | 02/15/2019 | By Tariq Malik
    NASA wants ideas for moon landers, space tugs and refueling ships. NASA Administrator Jim Bridenstine details the agency's plans to land astronauts on the moon by 2028 to space industry teams. (Image: © Joel Kowsky/NASA) =================================================================== WASHINGTON — NASA really wants to land astronauts on the moon in 2028. But to do that, the agency is looking to commercial space companies to build the landers, space tugs and refueling stations required to make a moon exploration effort that lasts. "This time, when we go to the moon we're going to stay," NASA Administrator Jim Bridenstine told a roomful of space...
  • "Disturbing" discovery: Giant hole found under Antarctica glacier

    01/31/2019 3:59:17 PM PST · by EdnaMode · 143 replies
    CBS News ^ | January 31, 2019 | Sarah Lynch Baldwin
    Researchers say a massive cavity the size of two-thirds of Manhattan was found under a glacier in Antarctica. The pocket is a sign of "rapid decay" and just one of "several disturbing discoveries" made recently regarding the glacier, NASA's Jet Propulsion Laboratory said in a news release Wednesday. "[The size of] a cavity under a glacier plays an important role in melting," said Pietro Milillo of the Jet Propulsion Laboratory. "As more heat and water get under the glacier, it melts faster." The growing cavity sits in West Antarctica at the bottom of Thwaites Glacier, which is about as big...
  • Scientists Find Possible Second Subglacial Impact Crater in Northwest Greenland

    02/12/2019 2:54:00 PM PST · by ETL · 20 replies ^ | Feb 12, 2019 | News Staff / Source
    Following the discovery of the 19.2-mile wide Hiawatha impact crater beneath the northwest margin of the Greenland Ice Sheet, Dr. Joe MacGregor of NASA’s Goddard Space Flight Center and colleagues explored satellite and aerogeophysical data in search of additional such craters and found a possible second impact crater that is 22.7 miles wide and 114 miles southeast of the Hiawatha crater. The discovery is described in a paper in the journal Geophysical Research Letters. ..." Following the finding of that first crater, Dr. MacGregor and co-authors checked topographic maps of the rock beneath Greenland’s ice for signs of other craters....
  • ‘Cool’ Textile Automatically Regulates Amount of Heat that Passes through it

    02/12/2019 4:46:29 AM PST · by vannrox · 10 replies
    science news ^ | Feb 11, 2019 | Editorial staff
    Made from specially engineered infrared-sensitive yarn, which responds to changes in the temperature and humidity of a person’s skin by dynamically collapsing or expanding the structure of its fibers, the newly-developed textile shows great potential in the development of clothing systems capable of autonomously adapting to demanding environments.This is the first textile to automatically change properties to trap or release heat depending on conditions. Image credit: Faye Levine, University of Maryland.

    02/12/2019 12:54:28 AM PST · by vannrox · 9 replies
    Spaceflight Insider ^ | 11FEB19 | LAUREL KORNFELD
    A new set of images showing the New Horizons spacecraft departing from Ultima Thule following its New Year’s Day closest approach reveals the Kuiper Belt Object (KBO) is shaped less like a snowman and more like a flat object, with one lobe looking like a pancake and the other like a dented walnut. Initial images returned immediately after the flyby suggested the double-lobed object was composed of two nearly-spherical lobes, one larger than the other. Their apparent nearly round shapes were not due to the lobes being rounded by their own gravity, as both are far too small to attain...
  • No, You Won’t See an 'Apocalypse Asteroid' in the Sky on Valentine's Day

    02/11/2019 8:52:53 PM PST · by BenLurkin · 7 replies ^ | February 11, 2019 03:56pm ET | Mike Wall,
    The English tabloid Express ran a story today (Feb. 11) with the headline "NASA warn 'APOCALYPSE asteroid' Bennu WILL appear in the sky this Valentine's Day." The piece claimed that the 1,640-foot-wide (500 meters) asteroid Bennu — "a doomsday asteroid which has a high probability of impacting Earth in one hundred years time" — will be "visible to the naked eye" on the night of Feb. 14, slightly to the right of Mars. This is entirely wrong. First of all, Bennu is not an "apocalypse asteroid," and NASA never labeled it such. (Agency scientists aren't known for their hyperbolic and...