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Epic black hole 54 EP

NGC 4151

RA 182.6358° · Dec 39.4057° · blackhole

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Score breakdown

· 4 badges
54 pts · Epic
Epic 78 pts → Anomaly
  • Black hole +26
  • Supermassive black hole +16
  • Outside our galaxy entirely +6
  • Actively feeding +6
Total score 54

24 more points to reach Anomaly.

Badges

  • Black hole · +26
  • Outside our galaxy entirely · +6
  • Supermassive black hole · +16
  • Actively feeding · +6

Trivia

What makes it special

  • It is feeding. Gas spiralling in is squeezed and heated to millions of degrees before it falls, so the disc around it blazes brighter than anything else in the neighbourhood.

Hard to believe

  • Mass. It weighs about 45 million times as much as the Sun, all of it crushed into a region with no surface and no size at all.

Handle with care

  • A gentle crossing. It is so vast that the stretching is mild at the horizon: you would cross the point of no return entirely intact, feeling nothing, with no way of knowing you had done it.
  • 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 NGC 4151.
  • What it is. A supermassive black hole. Practically every large galaxy has one, and how they grew so enormous so early in cosmic history is still an open question.

Sense of scale

  • In perspective. Deep in the extragalactic distance — further than the entire Virgo Cluster of galaxies.
  • Its event horizon. The point of no return sits 132.9 million km out, making the horizon about 265.9 million km across.

Properties

accreting
yes
bh class
supermassive
constellation
CVn
dist ly
62000000
first imaged
no
gw detection
no
host galaxy
NGC 4151
is sgr a
no
mass solar
45000000
name
NGC 4151
named
no
schwarzschild km
132930348.142

Nearby objects

About NGC 4151

NGC 4151 is an epic black hole. It lies about 62,000,000 light-years from Earth and sits in the constellation CVn.

Gas spiralling in is squeezed and heated to millions of degrees before it falls, so the disc around it blazes brighter than anything else in the neighbourhood.

How to see it

Look for NGC 4151 in the constellation CVn.

Like any astronomical target, NGC 4151 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 NGC 4151 is an epic black hole

NGC 4151 scores 54 points on Spacedle's rarity scale, which places it in the epic tier. Another 24 points would lift it into a rarer tier.

That score comes from 4 science badges — Black hole, Outside our galaxy entirely, Supermassive black hole and Actively feeding — 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.