Stars are massive bodies of incandescent gas located in outer space. Their luminescence is the result of large-scale nuclear reactions occurring in the core of the star. These reactions gradually consume the star's mass. Depending on how much fuel remains, stars can exist in many different forms.
Temperature Classification
- M: Less than 3,500K (degrees Kelvin)
- K: 3,500-5,000K
- G: 5,000-6,000K
- F: 6,000-7,500K
- A: 7,500-11,000
- B: 11,000-25,000K
- O: Greater than 25,000KShef.co.uk: The Classification of Stellar Spectra
Star News
Nasa.gov: Stars and Galaxies
Hubblesite.org: Star news
Science Daily:
Popular Science: The Biggest Boom In The Universe (May 20, 2008)
Popular Science:What Does a Star Sound Like?10.01.2009
Star Books and Merchandise
Amazon.com: Star Books, [DVDs & VHS, Electronics and Software
Edmund Scientific: Star and Astronomy Merchandise
Starry Night: Software
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References
Fast Facts
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Fact:
Made of burning gas around a solid core
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Fact:
Held together by gravity and gas pressure
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Fact:
Radiate light in different colors, depending on surface temperature
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Fact:
Release energy in all wavelengths of light, including invisible onesNASA Worldbook: NASA - Star
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Fact:
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Fact:
Groups of stars are known as galaxies
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Fact:
Large gravitational fields often hold planets in orbit
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Star closest to Earth
The Sun
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Next closest star
Proxima Centauri, 4.2 light-years away
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Fact:
VY Canis Majoris (VY CMa) the largest known star
