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Exam (elaborations)

Apparent and Absolute Magnitude Test Questions and Answers

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Apparent and Absolute Magnitude Test Questions and Answers Absolute Magnitude cont... more - Answer-Stars more than 32.6 LY away appear dimmer than they are High apparent magnitude and low absolute magnitude If a star is 32.6 LY away, its absolute and apparent magnitudes will be the same. Her...

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  • August 12, 2024
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Apparent and Absolute Magnitude
Test Questions and Answers

Absolute Magnitude cont... more - Answer-Stars more than 32.6 LY away appear
dimmer than they are
High apparent magnitude and low absolute magnitude
If a star is 32.6 LY away, its absolute and apparent magnitudes will be the same.

Hertzsprung-Russell (H-R) Diagram - Answer-Shows relationships between absolute
magnitude and temperature of stars.
Can also show the relationship between temperature and luminosity
As temperature increases, brightness increases and vice versa.

Stars - Answer-A body of gases that gives off a tremendous amount of energy in the
form of heat and light.

Star color - Answer-A clue to temperature
Red, orange, yellow, white and blue
Very hot = blue
Very cool = red
Medium = yellow (like our sun)

Size - Answer-Stars vary in size
Some stars are smaller than the sun.
The largest star is 2000 times larger than our sun!
Sun's diameter = 1,392,000 km

Composition - Answer-Hydrogen and helium are the two most common elements found
in stars.

Stellar Evolution-Stage 1: Nebulae - Answer-Cloud of gas and dust
70% H and 28% He
Dust is usually made of graphite, diamonds, Si, carbide, and other elements

Stage 2: Protostar - Answer-Developing star; no nuclear fusion
Nebula contracts forming protostar
Very hot--10,000,000°C

Stage 3: Main Sequence - Answer-90% of life spent in this stage
When the protostar is hot enough, fusion begins
Stable during this stage

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