Sure, here's a short timeline of a black hole forming:

1.  A massive star begins to collapse.
2. The core of the star collapses in on itself and rebounds outward, creating a supernova.
3. The explosion causes part of the star to be blasted into space.
4. The remaining core of the star continues to collapse in on itself, forming a stellar black hole.
5. The strong gravity of the black hole attracts gas and dust, forming an accretion disk.
6. As gas and dust are pulled into the black hole, they heat up and emit X-ray light, which is detected by telescopes.

If you have any more questions regarding black holes, feel free to ask!
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