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Whitmire and Matese speculated that Tyche's orbit would lie at approximately 500 times Neptune's distance, some 15,000 AU (2.2 × 10 12 km) from the Sun, a little less than one quarter of a light year. This is well within the Oort cloud, whose boundary is estimated to be beyond 50,000 AU.
Its orbit was expected to bring it within 0.429 AU (64,200,000 km; 39,900,000 mi) of Earth on December 26, 2013. [110] Nonetheless, believers tied it to the Nibiru cataclysm, claiming it would hit Earth on that date, or that it would fragment and pieces of it would hit Earth. [ 24 ]
Even without gravitational evidence, Mike Brown, the discoverer of Sedna, has argued that Sedna's 12,000-year orbit means that probability alone suggests that an Earth-sized object exists beyond Neptune. Sedna's orbit is so eccentric that it spends only a small fraction of its orbital period near the Sun, where it can be easily observed.
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Nemesis is a hypothetical red dwarf [1] or brown dwarf, [2] originally postulated in 1984 [3] to be orbiting the Sun at a distance of about 95,000 AU (1.5 light-years), [2] somewhat beyond the Oort cloud, to explain a perceived cycle of mass extinctions in the geological record, which seem to occur more often at intervals of 26 million years.
258 Tyche is a relatively large main belt asteroid discovered by Robert Luther at Düsseldorf-Bilk Observatory on 4 May 1886. [1] The stony S-type asteroid measures about 65 kilometers in diameter and has a perihelion of 2.1 AU. [1] Tyche orbits very close to the Eunomia family of asteroids, and could
Yikes, some Starlink satellites are falling out of orbit — and more of the latest space news you may have missed Sam Matthews Updated April 8, 2023 at 5:33 PM
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