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Transcript
Characteristics of Stars Quick Check: Copy and Fill In 6. AVERAGE STAR 2. 4. 1. 7. MASSIVE STAR 3. 5. 9. 8. Quick Check: Copy and Fill In AVERAGE STAR 2. Red Giant 4. Planetary Nebula 6. White Dwarf 8. Black Dwarf 1. Nebula 7. Neutron Star MASSIVE STAR 3. Red Supergiant 5. Supernova 9. Black Hole Define a star: • A ball of plasma held together by its own gravity • Heat and light planets in a system (like our Sun) Define nuclear fusion: • Process of splitting a large atom into 2 or more atoms • When atom splits, energy is released • Stars turn hydrogen into helium Define main sequence stars: • Major grouping of stars • Form a narrow band from the upper left to the lower right when plotted according to luminosity and surface temperature on the Hertzprung-Russell Diagram Copy this down to your notebook. Leave enough space for notes in square Distance Characteristics of Stars Temperature & Color Magnitude Star Classification: Distance • Distance which a ray of light would travel in one year • Measured in light years (186,000 miles per second) Star Classification: Magnitude • Measurement of brightness • Two Types: – Apparent Magnitude: • How bright stars APPEAR to be from Earth – Absolute Magnitude: • Luminosity • How bright a star actually is Star Classification: Temperature & Color • Blue Star = Hot • Red Star = Cold • As temperature decreases, brightness decreases as well • O,B,A, F,G,K, M [Oh Be a Fine Girl, Kiss Me] Star Classification Chart HOT Bright Decreasing Temp. COLD Dim
