Life Cycle of a Star
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Storyboard Beschreibung
Use a cycle chart or circle chart to illustrate the life cycle of a star in Science and Astronomy classes!
Storyboard-Text
- BLACK DWARF
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- STELLAR NEBULA
- MAIN SEQUENCE STAR
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- After a long period of time, the hot, dense core known as a white dwarf cools and stops radiating light.
- A nebula is a cloud of dust and gas that collapses under its own weight. As the cloud collapses, it gets warmer. When it reaches a certain temperature, nuclear fusion starts.
- At this stage, the outward pressure caused by nuclear fusion is balanced by the force of gravity holding the star together. The energy created by the nuclear fusion is emitted as radiation.
- WHITE DWARF
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- Life Cycle of a Star
- PLANETARY NEBULA
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- RED GIANT
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- A white dwarf is a hot, small, dense, dead star. This is the core of a star that remains after the outer layers have drifted off in the planetary nebula.
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- These are some of the most beautiful objects that can be observed in the night sky. A planetary nebula occurs when the outer layers of the star are lost when moving from a red giant to a white dwarf.
- When the star has used up its nuclear fuel (hydrogen), the star grows in size and the outer layers cool, making the star red.
- Image Attributions:The Orion Nebula and cluster from the VLT Survey Telescope (https://www.flickr.com/photos/esoastronomy/36032866602/) - European Southern Observatory - License: Attribution (http://creativecommons.org/licenses/by/2.0/)Planetary Nebula (https://www.flickr.com/photos/gsfc/8804537584/) - NASA Goddard Photo and Video - License: Attribution (http://creativecommons.org/licenses/by/2.0/)
Bildzuordnungen
- Planetary Nebula - NASA Goddard Photo and Video - (Lizenz Attribution )
- The Orion Nebula and cluster from the VLT Survey Telescope - European Southern Observatory - (Lizenz Attribution )
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