A black hole is not a cosmic vacuum cleaner sucking in everything nearby — it's a region where gravity is so strong that not even light can escape. Here's what each part of the classic diagram actually means.
Real images (like the Event Horizon Telescope's) are blurry, radio-wavelength composites — this diagram exaggerates and labels features for clarity, the same "illustration, not photograph" distinction covered elsewhere on this site.
A black hole with nothing nearby to pull in has no accretion disk and emits no light at all — it's detected only through its gravity's effect on nearby stars.
Where Earth is located in our galaxy.
Where black holes come from — the endpoint of the most massive stars.
The illustration-vs-observation distinction this page relies on.