<story><title>A Sun-like star orbiting a black hole</title><url>https://academic.oup.com/mnras/advance-article-abstract/doi/10.1093/mnras/stac3140/6794289</url></story><parent_chain><item><author>maaaaattttt</author><text>If the star is close enough I have a hard time imagining what is happening to its orbiting planets.&lt;p&gt;Did they &amp;quot;de-orbit&amp;quot; during the creation of the black hole? Or do the planets orbit the black hole as they were already orbiting the original star before that?&lt;p&gt;Does that mean you can have a mix of stars and planets orbiting another star? 
Could it even be possible that a star has planets and a star orbiting it AND the star orbiting it also has it&amp;#x27;s set of planets orbiting as well?&lt;p&gt;And what happens to the time on the planets once they orbit closer to the black hole?&lt;p&gt;So many (and apologies in advance if stupid) questions!</text></item></parent_chain><comment><author>ilyt</author><text>&amp;gt; Did they &amp;quot;de-orbit&amp;quot; during the creation of the black hole? Or do the planets orbit the black hole as they were already orbiting the original star before that?&lt;p&gt;If the mass wouldn&amp;#x27;t change the orbit wouldn&amp;#x27;t chance much, they&amp;#x27;re still orbiting &amp;quot;same&amp;quot; mass.&lt;p&gt;But in most cases (AFAIK) creation of black hole involves supernova so, well, that ain&amp;#x27;t gonna be very healthy for the planet itself (lmao) and part of the mass would get ejected and orbits would get more elliptical</text></comment>
<story><title>A Sun-like star orbiting a black hole</title><url>https://academic.oup.com/mnras/advance-article-abstract/doi/10.1093/mnras/stac3140/6794289</url></story><parent_chain><item><author>maaaaattttt</author><text>If the star is close enough I have a hard time imagining what is happening to its orbiting planets.&lt;p&gt;Did they &amp;quot;de-orbit&amp;quot; during the creation of the black hole? Or do the planets orbit the black hole as they were already orbiting the original star before that?&lt;p&gt;Does that mean you can have a mix of stars and planets orbiting another star? 
Could it even be possible that a star has planets and a star orbiting it AND the star orbiting it also has it&amp;#x27;s set of planets orbiting as well?&lt;p&gt;And what happens to the time on the planets once they orbit closer to the black hole?&lt;p&gt;So many (and apologies in advance if stupid) questions!</text></item></parent_chain><comment><author>devoutsalsa</author><text>Let&amp;#x27;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&amp;#x27;t think Star A &amp;amp; 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&amp;#x27;t think would change all that much.  It&amp;#x27;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.&lt;p&gt;Someone try this w&amp;#x2F; Universe Sandbox &amp;amp; report back please :) =&amp;gt; &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;universesandbox.com&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;universesandbox.com&amp;#x2F;&lt;/a&gt;</text></comment>