'Unknown Objects' Could Be Planet Nine

Astronomers have been hunting for Planet Nine — the large, mysterious body thought to lurk at the edge of our solar system — ever since researchers at Caltech published evidence of its existence last year.

By Sarah Kaplan The Washington Post 4-4-17

Ordinary people have now joined the search. And they've made some intriguing finds.

Participants in a citizen science campaign hosted by the crowdsourcing program Zooniverse, and the BBC pinpointed four previously unknown objects in the outer solar system that could be candidates for Planet Nine, according to researchers at the Australian National University.

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Mysterious ‘Planet Nine’ Causing The Solar System To Wobble?

“Because Planet Nine is so massive and has an orbit tilted compared to the other planets, the solar system has no choice but to slowly twist out of alignment...”

Astronomers can't see “Planet Nine.” But it makes its presence known. The massive hypothetical object, which supposedly looms at the edge of our solar system, has been invoked to explain the strange

By Sarah Kaplan The Washington Post 10-20-16

clustering of objects in the Kuiper belt and the unusual way they orbit the Sun.

Now Planet Nine predictors Konstantin Batygin and Mike Brown of Caltech, along with graduate student Elizabeth Bailey, offer another piece of evidence for the elusive sphere's existence: It adds “wobble” to the solar system, they say, tilting it in relation to the sun.

“Because Planet Nine is so massive and has an orbit tilted compared to the other planets, the solar system has no choice but to slowly twist out of alignment,” lead author Bailey said in a statement.

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By Seth Shostak
The Huffington Post
1-21-16

      It could be the first new planet discovered in the last 170 years -- or at least the last 85, if you're one of those stubborn folk who still insist on calling Pluto a planet.

Two Caltech astronomers, Mike Brown and Konstantin Batygin, have noticed some weird behavior in the outer solar system they think is caused by an unseen world orbiting roughly 500 times farther from the Sun than Earth does.

The evidence consists of a strange alignment of some so-called Kuiper Belt objects (KBOs) -- ice-bound orbs that are cousins of Pluto. These oversized hailstones are strewn throughout the dim and distant nether regions of our solar system. Their discovery almost a decade ago led to Pluto's loss of membership in the pantheon of planets. [...]

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By Joel Achenbach and Rachel Feltman
The Washington Post
1-20-16

     Astronomers at the California Institute of Technology announced Wednesday that they have found new evidence of a giant icy planet lurking in the darkness of our solar system far beyond the orbit of Pluto. They are calling it "Planet Nine."

Their paper, published in the Astronomical Journal, describes the planet as about five to 10 times as massive as the Earth. But the authors, astronomers Michael Brown and Konstantin Batygin, have not observed the planet directly.

Instead, they have inferred its existence from the motion of recently discovered dwarf planets and other small objects in the outer solar system. Those smaller bodies have orbits that appear to be influenced by the gravity of a hidden planet – a "massive perturber." [...]

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See Also:

Bizarre Comet-Like Alien Planet Found

Mystery Object in Lake on Saturn's Moon Titan | PHOTOs

NASA Spacecraft Nears Historic Dwarf Planet Arrival | VIDEO

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