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Life Cycle of a Star
Transcript of Life Cycle of a Star
A nebula is a cloud of hydrogen gas and dust in space and is the birthplace of stars.
Produces its own heat and light by nuclear reactions. It consist of mostly hydrogen and helium gas.
A red giant is a large bright star with a low temperature surface and is mostly red with an orange tint.
The Life Cycle of a Star
A star is a massive, luminous sphere of plasma held together by its own gravity.
Are 10 and 100 times bigger than the Sun.
White dwarfs are very small, hot and are one of the last stages in the life cycle of a star.
Has a mass similar to thatof the Sun, but a similar diameter to the earth.
The Flame Nebula
Sirius A (White Dwarf)
Supernovae are thought to be the main source of elements heavier than hydrogen and helium.
Cassiopeia A (supernova)
Another name for neutron stars is Pulsar.
Believed to form from massive stars at the end of their life times.
The gravitational pull in a black hole is so great that nothing can escape from it, not even light.The gravity is so strong because matter has been squeezed into a tiny space.
(GROUPS OF THREE)
Stars create there own light (radiate).
Planets reflect and absorb sunlight
Neutron stars are the tiniest stars known in
Crab Pulsar (supernova)
Stars are not visible during the day because the sunlight blocks out the other stars' light.
Small stars live longer (use less of their fuel)
Massive stars live shorter (use more of their fuel)
- MEDIUM SIZED
- MEDIUM TEMPERATURE
- MEDIUM BRIGHTNESS
HOW DO WE CLASSIFY STARS?
- Hertzsprung-Russell Diagram
- Organizes stars based on:
What is the closest star to planet Earth?
Does the Sun convect,conduct or radiate solar energy?
Why does Earth have seasons?
What are the atmospheric conditions at a specific time called?