Mass20 nonillion kg
111 octillionMale gorillas
556 septillionLoaded semi trucks
200 octillionBaby elephants
About 10 solar masses
Photo from Wikimedia Commons
Black Hole — Stellar Mass
A dead star so dense that light itself cannot escape/Deep Space
A stellar-mass black hole forms when a massive star (at least 20-25 times the mass of the Sun) collapses at the end of its life. A typical stellar black hole has about 10 solar masses and an event horizon diameter of about 60 km. Within that boundary, the escape velocity exceeds the speed of light, making it a one-way trip for anything that crosses it. Despite their fearsome reputation, stellar black holes are relatively common — there may be 100 million of them in the Milky Way alone.
Measurements
Event horizon diameter60,000 m
240,000Tambourine diameters
72.5Burj Khalifas
6 millionThumb tack lengths
About 60 km across; smaller than a city
Escape velocity (at horizon)300 million m/s
1Light speed
14,990Meteorites
The speed of light; that is the whole point
Schwarzschild radius30,000 m
10.7 quintillionElectron radii
10 millionSesame seeds
410,959Lipstick tubes
About 30 km
Tidal force at 1000 km50 billion N
5 quadrillionSand grain weights
5 trillionWet noodle flicks
2.5 millionHydraulic jacks
Extreme tidal stretching (spaghettification)
Hawking temperature6 billionths K
13.3 trillionthsBaking ovens
16.4 trillionthsHot Pocket centers
17 trillionthsFresh bread loaves
About 6 nanokelvin; essentially zero