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Keyword: asteroids

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  • See the Dramatic Increase in Near-Earth Asteroids NASA Has Discovered (Video)

    07/25/2018 2:14:03 AM PDT · by SunkenCiv · 34 replies
    Space.com ^ | July 24, 2018 | Mike Wall
    Scientists have taken much better stock of our neck of the cosmic woods over the past two decades, as a new NASA video makes clear. The animation maps out all known near-Earth asteroids (NEAs) -- space rocks that get within about 30 million miles (50 million kilometers) of our planet's orbit -- from 1999 through January 2018, in roughly 10-year time steps.  The differences are stark. In 1999, identified NEAs speckled the inner solar system thinly, in a light dusting. Many more were discovered by 2009, and Earth's neighborhood looks absolutely swamped in the present-day portion of the video. But...
  • Reviewing Asteroid Day 2018

    07/20/2018 4:51:07 PM PDT · by SunkenCiv · 6 replies
    Next Big Future ^ | July 19, 2018 | Brian Wang
    The European Southern Observatory (ESO) and ESA (European space agency) teamed up to produce a packed Asteroid Day webcast. There were interviews with ESA and ESO scientists. Updates from Europe’s asteroid hunters and some of the most recent asteroid science results, including the blockbuster news on Oumuamua, the first-ever interplanetary visitor. The programme also included an interview with ESA astronaut Luca Parmitano on the challenges of future human missions to asteroids, as well as a surprise segment that answered the age-old question: What really killed off the dinosaurs? More than 1M asteroids have the potential to impact Earth and through...
  • Scientist: Asteroid May Hit Earth in 2029

    12/23/2004 8:24:16 PM PST · by hole_n_one · 336 replies · 11,416+ views
    Yahoo/AP ^ | 12/23/04 | JOHN ANTCZAK
    Scientist: Asteroid May Hit Earth in 2029 Thu Dec 23, 5:40 PM ET By JOHN ANTCZAK, Associated Press Writer LOS ANGELES - There's a 1-in-300 chance that a recently discovered asteroid, believed to be about 1,300 feet long, could hit Earth in 2029, a NASA (news - web sites) scientist said Thursday, but he added that the perceived risk probably will be eliminated once astronomers get more detail about its orbit.   There have been only a limited number of sightings of Asteroid 2004 MN4, which has been given an initial rating of 2 on the 10-point Torino Impact Hazard...
  • What’ll happen when 3200 Phaethon sweeps past Earth?

    12/10/2017 6:41:56 AM PST · by BenLurkin · 15 replies
    earthsky.org ^ | December 10, 2017 | Deborah Byrd
    3200 Phaethon was the first asteroid to be discovered via spacecraft on October 11, 1983. Astronomers Simon F. Green and John K. Davies noticed it while searching Infrared Astronomical Satellite (IRAS) data for moving objects. Charles T. Kowal confirmed it optically and said it was asteroid-like in appearance. The object received the provisional designation 1983 TB. Two years later, in 1985, using the convention for naming asteroids, astronomers assigned it its number and name: 3200 Phaethon. An interesting feature of the orbit of 3200 Phaethon is that it comes very close to the sun, closer than any other named asteroid...
  • Asteroid Warning: Fragments which could wipe out Nations 'hidden in Taurids meteor shower'

    07/06/2018 2:42:45 PM PDT · by SunkenCiv · 44 replies
    Express UK ^ | Tuesday, June 6, 2017 | Sean Martin
    The startling finding means that experts may not be able to spot the massive space rock hidden in the annual Taurids meteor shower until it is too late. According to a group of researchers, one of the fragments could hit Earth in 2022, 2025, 2032 or 2039 during the annual meteor shower. The Taurids is a spectacular meteor shower that lights up the night skies every November. The meteor shower is the trail of debris left by the comet Encke. But the debris could be obscuring two asteroid chunks known as 2015 TX24 and 2005 UR that are potentially Earth-bound....
  • Impact of asteroid that will approach Earth in 2029 'CANNOT be ruled out' [but pretty much no]

    07/06/2018 1:50:43 PM PDT · by SunkenCiv · 63 replies
    Express UK ^ | Tuesday, June 27, 2017 | Sean Martin
    Astronomers have calculated the Apophis asteroid will speed past Earth on April 13, 2029, at just 18,600 miles away -- a hair's width in astronomical terms. To put that into perspective, the moon is 238,900 miles away... If the 27 billion kg asteroid were to hit Earth, scientists calculate that it would leave a crater over a mile wide and a staggering 518 metres deep. However, most worryingly, the impact would be equivalent to 880 million tons of TNT being detonated -- some 65,000 times as powerful as the nuclear bomb which was dropped on Hiroshima. The next time the...
  • A Collision in Space 466 Million Years Ago Is Still Hurling Asteroids at Earth

    07/05/2018 9:49:34 AM PDT · by SunkenCiv · 35 replies
    ScienceAlert ^ | January 26, 2017 | Josh Hrala
    Astronomers have found that the majority of meteorites that regularly fall into Earth's atmosphere today are the result of an asteroid collision that took place 466 million years ago. Using chemical analysis from rock samples around the world, the team discovered that before that colossal collision, Earth experienced impacts from many different types of meteorite, meaning that our planet's history with meteorites is far more complex than we thought. After examining the chemical makeup of these chrome-spinels, the team found that 34 percent of the pre-collision micrometeorites were primitive achondrites, a type of meteorite that only makes up 0.45 percent...
  • Massive 4 Vesta Asteroid Is Zooming by Earth, and Here's How You Can Spot It

    06/28/2018 8:04:51 PM PDT · by BenLurkin · 23 replies
    Inverse.com ^ | June 28, 2018 | By Josie Rhodes Cook on
    The space rock is coming for a visit, but it won't get too close for comfort. T he 4 Vesta asteroid is currently making a drive-by visit to Earth. The asteroid, which reportedly measures more than 300 miles in diameter, is now so close to Earth that at night, you can see it with your very own eyes — no telescope required. ... So why isn’t anyone freaking out over this massive rock flying through space so close to Earth? Because even though it’s so close we can see it in the night sky, it’s not actually that close at...
  • NASA now has an official plan for taking out asteroids

    06/23/2018 1:13:15 PM PDT · by TBP · 36 replies
    Glenn Beck website ^ | June 22, 2018 | Glenn Beck
    The next time asteroids menace the earth, we'll be ready. Because NASA has created a plan. But before you get too excited, unfortunately, NASA's just-released plan does not include a Bruce Willis-led crew of roughnecks landing on an asteroid and blowing it to smithereens with a nuke. Which begs the question, if that's not part of the plan, what's a potential "Space Force" actually for? Yesterday, the White House Office of Science and Technology Policy released a report titled, the "National Near-Earth Object Preparedness Strategy and Action Plan." Okay, see, this is the problem with government bloat. That title is...
  • New theory on origin of the asteroid belt

    09/14/2017 11:41:53 AM PDT · by BenLurkin · 48 replies
    Phys.org ^ | September 14, 2017 | by Bob Yirka
    Abstract The asteroid belt contains less than a thousandth of Earth's mass and is radially segregated, with S-types dominating the inner belt and C-types the outer belt. It is generally assumed that the belt formed with far more mass and was later strongly depleted. We show that the present-day asteroid belt is consistent with having formed empty, without any planetesimals between Mars and Jupiter's present-day orbits. This is consistent with models in which drifting dust is concentrated into an isolated annulus of terrestrial planetesimals. Gravitational scattering during terrestrial planet formation causes radial spreading, transporting planetesimals from inside 1 to 1.5...
  • Two Asteroids Make Close Flybys of Earth

    02/08/2018 9:39:35 AM PST · by BenLurkin · 14 replies
    The two asteroids are called 2018 CB and 2018 CC, and they were both discovered February 4 through an automated telescope search called the Catalina Sky Survey, according to NASA's Minor Planet Center. The Catalina telescopes belong to just one of many observatories worldwide that regularly scan the sky to track and search for space rocks, also known as asteroids. While the majority of asteroids in Earth's solar system orbit in the asteroid belt between Mars and Jupiter, asteroid flybys of Earth happen several times a year. The last known close asteroid flyby was on Sunday (Feb. 4). The flybys...
  • CNN: Undetected Asteroids Could Threaten Earth During Government Shutdown

    01/21/2018 10:36:18 PM PST · by Zakeet · 72 replies
    Breitbart ^ | January 21,2018 | Katherine Rodriguez
    Two CNN correspondents claimed during an episode of The Lead with Jake Tapper that an asteroid could potentially threaten the Earth if the government shutdown continues. [Snip] Forman and CNN anchor/chief Washington correspondent Jake Tapper were discussing how federal employees foregoing paychecks and government-funded ventures affected by the government shutdown would impact the economy. "It's not the just government workers—if the shutdown happens. It will have a real cascading effect on the economy," Tapper remarked. [Snip] Foreman added that if Congress does not reach a deal on a funding package and DACA amnesty negotiations, illegal aliens would be "thrust into...
  • A THREE MILE wide asteroid is set to graze past Earth on Sept. 1 - and NASA says it's the largest

    08/18/2017 4:14:12 PM PDT · by george76 · 41 replies
    Daily Mail ^ | 18 August 2017 | Cheyenne Macdonald
    A THREE MILE wide asteroid is set to graze past Earth on Sept. 1 - and NASA says it's the largest to come this close since they began keeping track ... [ full ] This is the closest an object this large has come ... since 1890. A massive asteroid estimated to be 2.7 miles wide is set to make a ‘relatively close encounter’ with Earth on September 1. ... The asteroid, named for Florence Nightingale, was first spotted in 1981, and the flyby in September will be the closest it’s come to Earth since 1890. ... According to NASA,...
  • NASA unveils plan to test asteroid defense technique

    07/01/2017 5:39:58 PM PDT · by plain talk · 44 replies
    ClickOrlando.com ^ | July 1, 2017 | Dakin Adone
    On Friday, the space agency announced plans to redirect the course of a small asteroid approaching Earth, as part of the Double Asteroid Redirection Test (DART), according to a NASA press release. The release notes that asteroids hit Earth nearly every day, but most are small enough to burn up in the atmosphere. But the DART project -- a joint effort between NASA and the John Hopkins Applied Physics Laboratory in Maryland -- is for the asteroids that are too big to break up -- those that could have severe consequences for the Earth if they hit. "DART would be...
  • Goldman Sachs: space-mining for platinum is 'more realistic than perceived'

    04/06/2017 10:51:01 PM PDT · by 2ndDivisionVet · 15 replies
    Business Insider ^ | April 6, 2017 | Jim Edwards
    Goldman Sachs is bullish on space mining with "asteroid-grabbing spacecraft." In a 98-page note for clients seen by Business Insider, analyst Noah Poponak and his team argue that platinum mining in space is getting cheaper and easier, and the rewards are becoming greater as time goes by. "While the psychological barrier to mining asteroids is high, the actual financial and technological barriers are far lower. Prospecting probes can likely be built for tens of millions of dollars each and Caltech has suggested an asteroid-grabbing spacecraft could cost $2.6bn," the report says. $2.6 billion (£2 billion) sounds like a lot, but...
  • NASA's Asteroid-Hunting Spacecraft Just Got an Amazing Side-Quest

    02/04/2017 4:20:04 PM PST · by BenLurkin · 24 replies
    gizmodo ^ | 02/04/2017 | Rae Paoletta
    For 10 days this month, OSIRIS-REx will investigate whether or not Trojan asteroids exist at certain points in Earth’s orbit called Lagrange points. Though Jupiter has Trojan asteroids, it’s unclear whether or not Earth’s Lagrange points host similar objects. After all, only one Earth Trojan has ever been found. “The Earth orbits around the Sun, and the Earth has a gravitational field and the Sun has a gravitational field,” explained Dante Lauretta, OSIRIS REx’s principal investigator. “Because of that property, there are certain points in space where those two fields balance each other out, called Lagrange points.” OSIRIS-REx will be...
  • Did A Giant Impact Create The Two Faces Of Mars?

    03/15/2007 2:14:24 PM PDT · by blam · 32 replies · 855+ views
    New Scientist ^ | 3-15-2007 | David Shiga
    Did a giant impact create the two faces of Mars? 16:29 15 March 2007 NewScientist.com news service David Shiga, Houston Mars's northern hemisphere is lower in elevation – by about 5 kilometres – than its southern hemisphere (see image below). This coloured topographical map shows low elevations in blue and high elevations in yellow and red. The map is centred on a latitude of 55° north (Illustration: Mike Caplinger/MSSS) Mars's southern hemisphere is higher and more heavily cratered than the northern hemisphere, suggesting it is older terrain. The two low elevations (blue) in this map, which is centred on the...
  • Red Planet Impact: Huge Moons May Have Crashed Into Mars

    07/04/2016 6:40:49 PM PDT · by BenLurkin · 11 replies
    Space.com ^ | July 4, 2016 11:01am ET | Charles Q. Choi
    Phobos and Deimos are both small for moons — about 14 and 7.7 miles (22.5 and 12.4 kilometers) wide, respectively — and sort of potato-shaped. Compared to other satellites in the solar system, they look more like asteroids. As a result, astronomers previously hypothesized that these moons were asteroids captured by Mars' gravitational pull. ...previous research suggested that Phobos and Deimos would have relatively irregular orbits. In reality, these moons have nearly circular orbits positioned near the Martian equator. ... huge impact that previous research suggested created the gigantic Borealis basin in the northern lowlands of Mars, which covers two-fifths...
  • Monster volcano gave Mars extreme makeover: study

    03/03/2016 11:08:06 AM PST · by BenLurkin · 17 replies
    phys.org ^ | March 2, 2016 by | Laurence Coustal, Marlowe Hood
    A volcano on Mars half the size of France spewed so much lava 3.5 billion years ago that the weight displaced the Red Planet's outer layers, according to a study released Wednesday. Mars' original north and south poles, in other words, are no longer where they once were. The findings explain the unexpected location of dry river beds and underground reservoirs of water ice, as well as other Martian mysteries that have long perplexed scientists, the lead researcher told AFP. "If a similar shift happened on Earth, Paris would be in the Polar Circle," said Sylvain Bouley, a geomorphologist at...
  • Red Planet's Ancient Equator Located

    04/24/2005 8:18:25 PM PDT · by SunkenCiv · 64 replies · 2,163+ views
    Scientific American (online) ^ | April 20, 2005 | Sarah Graham
    Jafar Arkani-Hamed of McGill University discovered that five impact basins--dubbed Argyre, Hellas, Isidis, Thaumasia and Utopia--form an arclike pattern on the Martian surface. Three of the basins are well-preserved and remain visible today. The locations of the other two, in contrast, were inferred from measurements of anomalies in the planet's gravitational field... a single source--most likely an asteroid that was initially circling the sun in the same plane as Mars--created all five craters. At one point the asteroid passed close to the Red Planet... and was broken apart by the force of the planet's gravity. The resulting five pieces subsequently...