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Keyword: worldsincollision

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  • Study of Uranus Suggests Some of its Moons are on a Collision Course

    07/04/2018 12:21:52 PM PDT · by SunkenCiv · 44 replies
    Phys.org ^ | September 6, 2017 | Bob Yirka
    The researchers report that they were studying the planet's rings, which are collectively called Eta, and discovered that they had an oddly shaped orbit -- not round or even circular. Instead, they describe it as sort of triangular. More study showed that the odd orbit of the rings was due to gravitational pull from Cressida -- one of the planet's moons. The gravitational impact is exaggerated, they note, due to the moon keeping pace with the orbit of the planet. The particles in the ring, on the other hand, move faster than the moon. This results in the moon tugging...
  • A massive object devastated Uranus a long time ago and it never fully recovered

    07/04/2018 9:26:44 AM PDT · by TaxPayer2000 · 51 replies
    BGR News ^ | July 3, 2018 | Mike Wehner
    ... New research shows that Uranus, a chilly, hostile planet with a number of peculiar features, was the victim of a devastating impact during those early years, and it might explain some of the planet’s strange personality. Uranus moves much differently than the other planets in our Solar System, spinning on its side in comparison to the rest of the worlds in our neighborhood. Astronomers have often wondered just how this happened, but simulations performed by scientists at Durham University’s Institute for Computational Cosmology might have finally produced the answer. “We ran more than 50 different impact scenarios using a...
  • Did Something Massive Smash Into Uranus?

    07/04/2018 9:22:32 AM PDT · by EdnaMode · 44 replies
    Gizmodo ^ | July 3, 2018 | Ryan F. Mandelbaum
    You might be aware of one of Uranus’ complexities: It spins on its side, and its moons orbit on that same rotated plane. New evidence strengthens the case that Uranus was smashed in a giant collision, resulting in its sideways orientation to its orbital plane and perhaps explaining some of the planet’s other mysteries. A new paper performs a series of simulations on Uranus early in its history, taking note of what an early impact may have done to its rotation rate, atmosphere, and internal structure. The impact could have left a clear signature still visible inside the planet we...
  • 'Cataclysmic' collision shaped Uranus' evolution

    07/03/2018 6:34:48 AM PDT · by Red Badger · 30 replies
    phys.org ^ | July 2, 2018 | Durham University
    The collision with Uranus of a massive object twice the size of Earth that caused the planet's unusual spin, from a high-resolution simulation using over ten million particles, coloured by their internal energy. Credit: Jacob Kegerreis/Durham University ___________________________________________________________________________ Uranus was hit by a massive object roughly twice the size of Earth that caused the planet to tilt and could explain its freezing temperatures, according to new research. Astronomers at Durham University, UK, led an international team of experts to investigate how Uranus came to be tilted on its side and what consequences a giant impact would have had on the...
  • How Did Uranus Form?

    03/09/2018 9:43:05 AM PST · by Simon Green · 83 replies
    Space.com ^ | 03/08/18 | Nola Taylor Redd,
    Although planets surround stars in the galaxy, how they form remains a subject of debate. Despite the wealth of worlds in our own solar system, scientists still aren't certain how planets are built. Currently, two theories are duking it out for the role of champion. The first and most widely accepted, core accretion, works well with the formation of the terrestrial planets but has problems with giant planets such as Uranus. The second, the disk instability method, may account for the creation of giant planets. "What separates the ice giants from the gas giants is their formation history: during...
  • HUBBLE JUST SPOTTED SOMETHING MASSIVE COMING OUT OF URANUS

    10/14/2017 4:17:21 PM PDT · by Lazamataz · 94 replies
    Bursts of solar winds caused a huge sparkling region on Uranus, scientists observed this by using Hubble space telescope. Electrons that come from various origins such as solar winds, the planetary ionosphere and moon volcanism, when charged in the form of streams caused this, researchers from the Paris Observatory used the NASA/ESA Hubble Space Telescope to observe this on Uranus. They were able to catch it in powerful magnetic fields and, controlled it into the upper atmosphere, where set off spectacular bursts of light when made interactions with gas particles, such as oxygen or nitrogen.
  • Why is Uranus on its Side?

    08/06/2016 8:37:29 AM PDT · by BenLurkin · 60 replies
    universetoday.com ^ | 5 Aug , 2016 | Faser Cain
    It’s impossible to do an article about Uranus without opening up the back door to a spit storm of potty humour.... Anyway, perhaps one of the strangest aspects of Uranus is its tilt.... The Earth is tilted 23.5 degrees away from the Sun’s equator. Mars is 25 degrees, and even Mercury is 2.1 degrees tilted.... Uranus is 97.8 degrees... ...[A]stronomers define the angle as greater than 90 degrees when you take its direction of rotation into account. When you describe it as turning in the same direction as the rest of the planets in the Solar System, then you have...
  • Storms on Jupiter are disturbing the planet's colorful belts

    08/23/2019 6:09:05 AM PDT · by Red Badger · 25 replies
    www.eurekalert.org ^ | University of California - Berkeley | University of California - Berkeley
    Radio, IR and optical observations show evolution of plumes and their impact on belts and zones Storm clouds rooted deep in Jupiter's atmosphere are affecting the planet's white zones and colorful belts, creating disturbances in their flow and even changing their color. Thanks to coordinated observations of the planet in January 2017 by six ground-based optical and radio telescopes and NASA's Hubble Space Telescope, a University of California, Berkeley, astronomer and her colleagues have been able to track the effects of these storms -- visible as bright plumes above the planet's ammonia ice clouds -- on the belts in which...
  • The sun follows the rhythm of the planets

    06/05/2019 4:54:27 PM PDT · by grey_whiskers · 95 replies
    SpaceDaily.com ^ | May 30, 2019 | "Staff writers"
    One of the big questions in solar physics is why the Sun's activity follows a regular cycle of 11 years. Researchers from the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), an independent German research institute, now present new findings, indicating that the tidal forces of Venus, Earth and Jupiter influence the solar magnetic field, thus governing the solar cycle.
  • MARS AND EARTH MAY NOT HAVE BEEN EARLY NEIGHBORS

    12/19/2017 7:27:49 PM PST · by MtnClimber · 29 replies
    Astrobiology Magazine ^ | 18 Dec, 2017 | Joelle Renstrom
    A study published in the journal Earth and Planetary Science Letters posits that Mars formed in what today is the Asteroid Belt, roughly one and a half times as far from the Sun as its current position, before migrating to its present location. The assumption has generally been that Mars formed near Earth from the same building blocks, but that conjecture raises a big question: why are the two planets so different in composition? Mars contains different, lighter, silicates than Earth, more akin to those found in meteorites. In an attempt to explain why the elements and isotopes on Mars...
  • Earth Must Have Another Moon, Say Astronomers

    12/22/2011 7:05:56 AM PST · by Lonesome in Massachussets · 44 replies
    Back in 2006, the Catalina Sky Survey in Arizona noticed that a mysterious body had begun orbiting the Earth. This object had a spectrum that was remarkably similar to the titanium white paint used on Saturn V rocket stages and, indeed, a number of rocket stages are known to orbit the Sun close to Earth. But this was not an object of ours. Instead, 2006 RH120, as it became known, turned out to be a tiny asteroid just a few metres across--a natural satellite like the Moon. It was captured by Earth's gravity in September 2006 and orbited us...
  • Baby Jupiter was likely slammed by planet 4.5 billion years ago

    08/15/2019 11:34:57 AM PDT · by rdl6989 · 19 replies
    New York Post ^ | August 15, 2019 | Mike Wehner
    Scans from NASA’s Juno spacecraft have hinted that Jupiter’s core isn’t exactly what scientists once thought it was. The core isn’t as dense as researchers suspected, but determining why that is has proven to be a challenge. “This is puzzling,” Andrea Isella, co-author of a new study published in Nature, said in a statement. “It suggests that something happened that stirred up the core and that’s where the giant impact comes into play.”
  • Object Survives Being Swallowed by a Star

    08/03/2006 10:40:47 AM PDT · by NormsRevenge · 16 replies · 421+ views
    Space.com on Yahoo ^ | 8/3/06 | Ker Than
    Long before the Bible's tale of Jonah being swallowed by a whale, a small wannabe star has emerged intact after being engulfed by a neighboring giant star, scientists say. The victim was a brown dwarf, a failed star too small to sustain the nuclear reactions that ignites regular stars. The purpetrator was a red giant, an ancient star that once resembled our Sun but which puffed up to enormous size after its hydrogen fuel was depleted. The red giant has since expelled most of its gas into space and transformed into a dense, Earth-sized star called a white dwarfs. Using...
  • Moving the Orbits of Planets

    02/02/2006 9:44:25 AM PST · by SunkenCiv · 40 replies · 737+ views
    David Jewitt ^ | Last updated Sep 2004 | David Jewitt
    Meanwhile, the Doppler discovery of extrasolar planets orbiting very close to their parent stars has raised a different problem. Many of the planets are so close to their stars (<0.1 AU), and so hot, that they cannot be supposed to have formed where we now observe them. By inference, they could have formed at larger distances (several AU) and then migrated inwards. What would cause this inward migration? As with the solar system case, the root cause may be an exchange of angular momentum with material surrounding the planets at their formation. In particular, if the extrasolar planets formed in...
  • Amazon River Once Flowed in Opposite Direction

    10/24/2006 9:54:37 PM PDT · by SunkenCiv · 36 replies · 505+ views
    PhysOrg ^ | October 24, 2006 | University of North Carolina at Chapel Hill
    Russell Mapes, a graduate student from Grass Valley, Calif., ...explains that these sediments of eastern origin were washed down from a highland area that formed in the Cretaceous Period, between 65 million and 145 million years ago, when the South American and African tectonic plates separated and passed each other. That highland tilted the river's flow westward, sending sediment as old as 2 billion years toward the center of the continent. A relatively low ridge, called the Purus Arch, which still exists, rose in the middle of the continent, running north and south, dividing the Amazon's flow - eastward toward...
  • A Diamond the Size of Earth - is this Jupiter's core?

    12/28/2018 10:47:49 AM PST · by Red Badger · 57 replies
    www.guide-to-the-universe.com ^ | 12/28/2018 - Undated | Staff
    In his book "2061 - Odyssey Three" (the third of his Space Odyssey series), Arthur C. Clarke put forward the intriguing proposal that the core of the planet Jupiter was, in fact, a diamond the size of Earth. Now Clarke, even though a science fiction author of some repute, had a science background and always tried to bring rigorous scientific accuracy to his stories. So, could his proposition be possible? The somewhat predictable answer is - we don't know. But we can analyse the possibility within known scientific parametres, to see if it is, at least, possible. For diamond to...
  • UFOs in the Old Testament

    05/07/2008 2:06:53 PM PDT · by big'ol_freeper · 71 replies · 173+ views
    Within the unimaginable depths of the universe there is a small family of worlds circling about a star we call the Sun; it is just a single star among the billions upon billions which are shining in the cosmos. Against the awesome backdrop of the infinite blackness of space, our world is just another planet; nothing more than an insignificant speck on the cosmological scale of things, but it is our home, and as of yet we have found no other planets which are remotely like Earth. The history of our world is a story which is still largely incomplete....
  • Science Says: A big space crash likely made Uranus lopsided

    12/21/2018 10:37:36 AM PST · by Red Badger · 42 replies
    AP ^ | 12/21/2018 | By SETH BORENSTEIN
    <p>WASHINGTON (AP) — Uranus is a lopsided oddity, the only planet to spin on its side. Scientists now think they know how it got that way: It was pushed over by a rock at least twice as big as Earth.</p>
  • A big space crash likely made Uranus lopsided

    12/21/2018 10:37:30 AM PST · by ETL · 23 replies
    Phys.org ^ | Dec 21, 2018 | Seth Borenstein
    <p>Uranus is a lopsided oddity, the only planet to spin on its side. Scientists now think they know how it got that way: It was pushed over by a rock at least twice as big as Earth.</p> <p>Detailed computer simulations show that an enormous rock crashed into the seventh planet from the sun, said Durham University astronomy researcher Jacob Kegerreis, who presented his analysis at a large earth and space science conference this month.</p>
  • Can Venus Teach Us to Take Climate Change Seriously? (Venus CO2 96.5%, Earth CO2 0.03%!)

    12/02/2018 10:29:53 AM PST · by ETL · 63 replies
    Space.com ^ | Nov 29, 2018 | Meghan Bartels, Space.com Senior Writer
    If human-induced climate change continues unchecked, 10 percent of the U.S. economy could evaporate by 2100, a 1,656-page federal report the White House slipped out on Black Friday (Nov. 23) warned — but a nearby world has an even hotter climate problem than ours, and scientists say we could learn some valuable lessons from it. That world is Venus, Earth's "evil twin," which was once nice enough — until something went wrong and the atmosphere began trapping a little too much heat. Scientists aren't positive precisely how events played out, but the runaway greenhouse effect that resulted is beyond debate:...