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How are Stars Formed

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A Star is 'Celestial body of hot gases that radiates energy derived from ... Merlin network. Brown Dwarf. White Dwarf. Neutron Star. Black Hole. Supernova ... – PowerPoint PPT presentation

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Title: How are Stars Formed


1
How are Stars Formed?
2
What is a Star?
  • A Star is Celestial body of hot gases that
    radiates energy derived from thermonuclear
    reactions in the interior.

3
How are Stars formed?
  • Cloud of cool gas
  • Dense molecular gas
  • Clouds collapse and increase in density

4
How are Stars formed?
  • Either
  • It can collide with another cloud
  • It can encounter the pressure caused by a giant
    supernova.
  • Several stars can be born at once
  • Heat energy comes from the mutual gravity

5
How are stars formed?
Extreme Temperature
CNO Cycle
Large
Protostar
Medium
P-P Cycle
High Temperature
Small
No star formed
6
(No Transcript)
7
How do we know?
  • Visual light telescopes
  • Limited views
  • Restricted distance
  • The wavelength of light

8
How do we know? Part 2
  • Young stars emit ionised stellor winds
  • Merlin network

9
Brown Dwarf
10
White Dwarf
11
Neutron Star
12
Black Hole
13
Supernova
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