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Keyword: cometfocussing

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  • Is 'Planet Nine' actually a grapefruit-sized black hole? Big new telescope could find out

    07/12/2020 9:46:33 AM PDT · by BenLurkin · 37 replies
    space,com ^ | 07/11/2020
    Over the past few years, researchers have noticed an odd clustering in the orbits of multiple trans-Neptunian objects (TNOs), which dwell in the dark depths of the far outer solar system. Some scientists have hypothesized that the TNOs' paths have been sculpted by the gravitational pull of a big object way out there, something five to 10 times more massive than Earth (though others think the TNOs may just be tugging on each other). This big "perturber," if it exists, may be a planet — the so-called "Planet Nine," or "Planet X" or "Planet Next" for those who will always...
  • Researcher links mass extinctions to 'Planet X'

    04/02/2016 2:43:56 PM PDT · by 2ndDivisionVet · 40 replies
    Phys.Org ^ | March 30, 2016 | Bob Whitby
    Periodic mass extinctions on Earth, as indicated in the global fossil record, could be linked to a suspected ninth planet, according to research published by a faculty member of the University of Arkansas Department of Mathematical Sciences. Daniel Whitmire, a retired professor of astrophysics now working as a math instructor, published findings in the January issue of Monthly Notices of the Royal Astronomical Society that the as yet undiscovered "Planet X" triggers comet showers linked to mass extinctions on Earth at intervals of approximately 27 million years. Though scientists have been looking for Planet X for 100 years, the possibility...
  • New Examination of Trans-Neptunian Objects Suggests Two Planets Lurk in Outer Solar System

    01/16/2015 11:06:16 AM PST · by lbryce · 20 replies
    From Quarks to Quasars ^ | January 16, 2015 | James Trosper
    Presently, our solar system is known to contain 4 fully-fledged rocky worlds: Mercury, Venus, Earth and Mars; 2 ice-giants: Neptune and Uranus; 2 gas-giants, Saturn and Neptune; 5 dwarf-planets, Ceres. Pluto, Eris, MakeMake, Haumea; around 100 moons; and an unknowable number of comets, asteroids and minor planets. Indeed, we’ve only begun to understand the full scope of our local corner of our galaxy, and new information emerges on a monthly-basis, yet there a number of seemingly obvious things that remain unknown. For instance, long before Pluto’s existence was deduced, astronomers scoured the outer solar system in search of another large...
  • Astronomers are Predicting at Least Two More Large Planets in the Solar System

    01/15/2015 3:45:27 PM PST · by BenLurkin · 77 replies
    universetoday.com ^ | on January 15, 2015 | Nancy Atkinson
    In their studies, the team analyzed the effects of what is called the ‘Kozai mechanism,’ which is related to the gravitational perturbation that a large body exerts on the orbit of another much smaller and further away object. They looked at how the highly eccentric comet 96P/Machholz1 is influenced by Jupiter (it will come near the orbit of Mercury in 2017, but it travels as much as 6 AU at aphelion) and it may “provide the key to explain the puzzling clustering of orbits around argument of perihelion close to 0° recently found for the population of ETNOs,” the team...