could we tell now if a black hole is aproaching? and how close needs to be so we can detect it?
- Anonymous1 month ago
you hear a low-base music coming from a great distance
- billrussell42Lv 71 month ago
depends on the exact path, and how close it comes to occluding a star. It would bend the light from a star if it were close to the line between the star and us, which would be visible if a telescope happened to be looking at that star or that area. So that could be a very distance away.
How close to that line it has to be depends on the mass of the black hole, which is unknown.
Don't forget that we can detect black holes at the center of galaxies billions of light years away.
- 1 month ago
Well to see if a black hole is approaching or not we will need satellite images. For the second one to detect it, the blackhole will need to be in the range of a satellite so it can get the image also not to close, if it was too close the satellite will get sucked in so probably it would have to be far but close enough for the satellite to see the black hole.