Astronomers theorize that a black hole forms when a massive object shrinks catastrophically under its own gravity, leaving only a gravitational field so strong that nothing escapes it. astronomers must infer the existence of black holes, which are invisible, from their gravitational influence on the visible bodies surrounding them. for example, observations indicate that gas clouds in galaxy m87 are whirling unusually fast about the galaxy's center. most astronomers believe that the large concentration of mass at the galaxy's center is a black hole whose gravity is causing the gas to whirl. a few skeptics have argued that the concentration of mass necessary to explain the speed of the whirling gas is not necessarily a black hole: the concentration in m87 might be a cluster of a billion or so dim stars.
Answers: 2
Geography, 22.06.2019 18:30
The physical processes that create most of earth's physical features, including mountains, are known as
Answers: 1
Geography, 23.06.2019 03:00
Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4
Answers: 2
Geography, 23.06.2019 11:30
Which year held a congressional election and a presidential election
Answers: 3
Geography, 24.06.2019 00:30
What is one early technological advance that shaped culture? a the use of fire b the discovery of arable land c family units. d migration
Answers: 2
Astronomers theorize that a black hole forms when a massive object shrinks catastrophically under it...
Mathematics, 08.12.2019 08:31
Physics, 08.12.2019 08:31
Social Studies, 08.12.2019 08:31
Mathematics, 08.12.2019 08:31
Advanced Placement (AP), 08.12.2019 08:31
Social Studies, 08.12.2019 08:31
Physics, 08.12.2019 08:31
Physics, 08.12.2019 08:31
Social Studies, 08.12.2019 08:31
Mathematics, 08.12.2019 08:31