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Star's death will play a mean pinball with rhythmic planets 5nvklj





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Star's death will play a mean pinball with rhythmic planets

Dragon
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Star's death will play a mean pinball with rhythmic planets Empty Star's death will play a mean pinball with rhythmic planets

Post by Dragon Sat Jun 12, 2021 3:35 am

Four planets locked in a perfect rhythm around a nearby star are destined to be pinballed around their solar system when their sun eventually dies, according to a new study that peers into its future.

Astronomers have modeled how the change in gravitational forces in the system as a result of the star becoming a white dwarf will cause its planets to fly loose from their orbits and bounce off each other's gravity, like balls bouncing off a bumper in a game of pinball.


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Star's death will play a mean pinball with rhythmic planets 334pu7m
Dragon
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Post by Dragon Sat Jun 12, 2021 3:37 am

Star's death will play a mean pinball with rhythmic planets Planet
Credit: Unsplash/CC0 Public Domain

The HR 8799 system is 135 light years away and comprises a 30-40 million year-old A type star and four unusually massive planets, all over five times the mass of Jupiter, orbiting very close to each other.

The system also contains two debris disks, inside the orbit of the innermost planet and another outside the outermost.

Recent research has shown that the four planets are locked in a perfect rhythm that sees each one completing double the orbit of its neighbor: so for every orbit the furthest completes, the next closest completes two, the next completes four, while the closest completes eight.


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Star's death will play a mean pinball with rhythmic planets 334pu7m
Dragon
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Post by Dragon Sat Jun 12, 2021 3:38 am



Planets Orbiting HR 8799

This video shows four Jupiter-sized exoplanets orbiting billions of miles away from their star in the nearby HR 8799 system.

The planetary system is oriented face-on toward Earth, giving astronomers a unique bird’s-eye view of the planets’ motion.

The exoplanets are orbiting so far away from their star that they take anywhere from decades to centuries to complete an orbit.

The video consists of seven images of the system taken over a seven-year period with the W.M. Keck Observatory on Mauna Kea, Hawaii.

Keck’s coronagraph blocks out most of the starlight so that the much fainter and smaller exoplanets can be seen.


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