---

A black hole is a region of spacetime exhibiting gravitational acceleration so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. The boundary of the region from which no escape is possible is called the event horizon. Although the event horizon has an enormous effect on the fate and circumstances of an object crossing it, no locally detectable features appear to be observed. In many ways, a black hole acts like an ideal black body, as it reflects no light. Moreover, quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation, with the same spectrum as a black body of a temperature inversely proportional to its mass. This temperature is on the order of billionths of a kelvin for black holes of stellar mass, making it essentially impossible to observe.

---

---

Interesting:

---

The Hubble Space Station Inside  Solar System Project Steps  Astronaut Nasa Jobs  Simple Solar System Mechanical Gear  Betelgeuse Supernova  Apollo 8 Movie  A Far Distance From Mars  Barren Solar System  Marvin Nasa  Is Neptune A Gas Planet  Orion Spacecraft Heat Shield  Different Galaxies In Space 

---

Related queries:

---

Black Hole Picture, Black Hole Sun, Black Holes In Space, Black Hole Sun Lyrics, Black Hole Image, Black Hole Of Calcutta, Black Hole Weaponry, Black Hole Facts, Black Hole Chan, 

---