One way to observe a black hole would be to look for a binary system with 1 star orbiting a compact, dark object with mass &gt; 3M o .
(One way to observe a black hole; would be; to look for a binary system with 1 star orbiting a compact, dark object with mass &gt) (One way to observe a black hole; to look; for a binary system with 1 star orbiting a compact, dark object with mass &gt) (1 star; orbiting; a compact, dark object)
One way to observe a black hole One way to observe a black hole 1 star
would be to look orbiting
to look for a binary system with 1 star orbiting a compact, dark object with mass &gt
for a binary system with 1 star orbiting a compact, dark object with mass &gt
a compact, dark object