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Rare black hole 42 EP

Gaia BH2

RA 207.5697° · Dec -59.2390° · blackhole

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Score breakdown

· 4 badges
42 pts · Rare
Rare 50 pts → Epic
  • Black hole +26
  • Distant (over 1,000 light-years) +6
  • Stellar-mass black hole +6
  • Dormant (nothing left to eat) +4
Total score 42

8 more points to reach Epic.

Badges

  • Black hole · +26
  • Distant (over 1,000 light-years) · +6
  • Stellar-mass black hole · +6
  • Dormant (nothing left to eat) · +4

Trivia

What makes it special

  • Dormant. Nothing is falling into it right now, so it gives off no light of its own at all. It was found purely by what its gravity does to everything nearby.

Handle with care

  • Spaghettification. Its gravity pulls your feet so much harder than your head that you would be stretched into a thread roughly 758 km out — long before you ever reached the horizon.
  • No way back. Cross the event horizon and every path you could possibly take leads inwards. It is not that you cannot go fast enough — it is that 'out' has stopped being a direction.

What it actually is

  • Where it lives. It sits at the very heart of Milky Way.
  • What it is. A stellar-mass black hole: what is left behind when a star far heavier than the Sun exhausts its fuel and its core collapses in less than a second.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.
  • Its event horizon. The point of no return sits 26.4 km out, making the horizon about 52.8 km across.
  • Sense of scale. The whole horizon is only 52.8 km wide — a city-sized hole in the universe with the mass of stars inside it.

Properties

accreting
no
bh class
stellar
constellation
Cen
dist ly
3800
first imaged
no
gw detection
no
host galaxy
Milky Way
is sgr a
no
mass solar
8.94
name
Gaia BH2
named
no
schwarzschild km
26.409

About Gaia BH2

Gaia BH2 is a rare black hole. It lies about 3,800 light-years from Earth and sits in the constellation Cen.

Nothing is falling into it right now, so it gives off no light of its own at all. It was found purely by what its gravity does to everything nearby.

How to see it

Look for Gaia BH2 in the constellation Cen.

Like any astronomical target, Gaia BH2 is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.

Why Gaia BH2 is a rare black hole

Gaia BH2 scores 42 points on Spacedle's rarity scale, which places it in the rare tier. Another 8 points would lift it into a rarer tier.

That score comes from 4 science badges — Black hole, Distant (over 1,000 light-years), Stellar-mass black hole and Dormant (nothing left to eat) — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.