22.2 Stars Change Over Their Life Cycles CLICK ME!!!

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Presentation transcript:

22.2 Stars Change Over Their Life Cycles CLICK ME!!!

We classify stars by their characteristics All stars are balls of glowing gas that produce or have produced energy by fusion The amount of light and its distance determine how bright a star appears from Earth. Sizes range from super giants to white dwarfs Each stars color is determined my its temperature

Star Temperatures and Color HOT !

What is PARALLAX? The apparent shift in the position of an object when viewed from different locations. Try this! Close one eye at a time and focus on a single object. Blink back and forth quickly. What happens!? Does the object appear to move? How do astronomers use parallax to measure distance of stars? To plot a star’s position from opposite sides of Earth’s orbit.

Nebula: cloud of gas and dust in which stars may form Sentence: Gravity pulls particles closer together in some regions of a nebula. picture Three stages of a lower-mass star: Main sequenceGiant StarWhite Dwarf

Neutron Stars Black Holes Emits radiation Visible light mass= 1-3 times that of the Sun NO radiation invisible mass= more than 3 times the Sun Extremely dense Core left after supernova