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Let's assume the Star A and the Black Hole B hole orbited each other when the black hole was Star B. If Star B collapsed into a black hole of roughly the same
by devoutsalsa 4y ago
Let's assume the Star A and the Black Hole B hole orbited each other when the black hole was Star B. If Star B collapsed into a black hole of roughly the same mass, I don't think Star A & its planets would be affected much at all in terms or orbits. Maybe the Star A system would have been fried when Star B went supernova, but the orbits I don't think would change all that much. It's like how people say Earth would continue orbiting the center of our solar system if our sun turned into a black hole, as the center of gravity would be the same.
Someone try this w/ Universe Sandbox & report back please :) => https://universesandbox.com/ https://universesandbox.com/
- chasil 4y ago"Star A" is nearly the mass of our sun. When our sun exhausts the hydrogen in the core, it will swell as a red giant, encompass the orbits of Mercury and Venus, and likely come very close to earth. "Black hole B" is currently ten times the mass of our sun. The star that produced it was likely much more massive still. The red giant phase of such a star might have reached to Neptune, so there is no way that these two evolved together. When the star in this pair exhausts its hydrogen, the black hole will drain the red giant that it becomes.
- pmontra 4y agoDisclaimer: I can't make any calculation but... Wouldn't Star A keep orbiting Star B inside the surface of Red Giant Star B, which wouldn't be very dense at the radius of the orbit? There is drag but a lot of inertia. Star A would start from further away than now. It would probably get some extra mass in the process, absorbing the gas of the red giant.
- mr_toad 4y ago> When the star in this pair exhausts its hydrogen, the black hole will drain the red giant that it becomes. I wonder if the accreting matter might undergo fusion.