Black Hole

## General Information

Black Holes of Kurzgesagt is a minimalist version of black holes, to compliment the style of the videos. Black holes have been shown in videos mentioning outer space or the understanding of black holes.

## Look

Design of the black holes resemble depictions of black holes, such as having an orange glow. The glow, named the event horizon, is shaped like a disk around the round black hole itself.

## Astronomy

A black hole is a region of spacetime where gravity is so strong, nothing can escape from it, even including light. Black holes exist when spacetime gets very curved an object. Once objects enter the event horizon, it is impossible to escape.

### List of Recognized Black Holes

* 1ES 2344+514
* Ton 618
* 3C 371
* 4C +37.11
* AP Lib
* S5 0014+81
* APM 08279+5255
* Arp 220
* Centaurus A
* Fornax A
* HE0450-2958
* IC 1459
* Messier 31
* Messier 32
* Messier 51
* Messier 60
* Messier 77
* Messier 81
* Messier 84
* Messier 87
* Messier 104
* Messier 105
* Messier 106
* Mrk 421
* Mrk 501
* NGC 821
* NGC 1023
* NGC 1097
* NGC 1271
* NGC 1277
* NGC 1332
* NGC 1566
* NGC 2787
* NGC 3079
* NGC 3115
* NGC 3377
* NGC 3384
* NGC 3998
* NGC 4151
* NGC 4261
* NGC 4438
* NGC 4459
* NGC 4473
* NGC 4486B
* NGC 4564
* NGC 4579
* NGC 4596
* NGC 4697
* NGC 4889
* NGC 4945
* NGC 5033
* NGC 6251
* NGC 7052
* NGC 7314
* PKS 0521-365
* Q0906+6930
* RX J1131
* Sagittarius A

## Types

Generally, there are three main types of black holes that have been recognized, stellar, intermediate, or supermassive.

### Stellar

If a star with 20 times greater mass than the Sun reaches its end, it will explode into a supernova and leave a stellar black hole. The size of the black hole itself depends on the mass of the original star.

### Intermediate

Not much is known about this type, but it’s said that these black holes are 100-100,000 times larger than our sun. Scientists assume these black holes are medium-sized.

### Supermassive

Supermassive black holes are most common in the center of galaxies. These black holes are around one million to one billion times more massive than the sun. Observations show that some supermassive black holes formed in the first billion years after the universe formed. Scientists believe they formed from supermassive stars.

### Ultramassive

Ultramassive black holes are the most massive objects in space. They are tens of billions times bigger than The Sun. These black holes could also be found in the center of galaxies, and is said to be found in the center of the Milky Way.

### Primordial

Scientists believe primordial black holes right after the formation of the universe. It’s said hot enough material was dense enough to form these black holes. With masses said to be 100,000 times smaller than paperclips to 100,000 larger than the sun. There’s no concrete evidence that these black holes exist. Scientists believe, however, that these objects have evaporated over time.

### Quasar

Quasars are galactic nuclei. The power of nucleus comes from the supermassive black hole in the center. Quasars feed on gas and dust from galaxies.

#### Blazars

Blazers are similar to quasars. However they are active galaxy nuclei with jets that are pointed to the viewer. The electromagnetic radiation of the jets cause the blazer to look brighter than they actually are.