What is the primary factor that affects the apparent brightness of a star?

Distance Measurement in Astronomy

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Physics
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9th - 12th Grade
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Hard

Patricia Brown
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The star's color
The star's age
The star's distance from Earth
The star's size
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are 'standard candles' used for in astronomy?
Measuring the temperature of stars
Determining the age of galaxies
Calculating the mass of planets
Measuring relative distances in the universe
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which method is an example of an absolute distance estimator?
Cepheid variable method
Trigonometric parallax
Type Ia Supernovae
Tully-Fisher relation
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main limitation of the Trigonometric Parallax Method?
It requires knowledge of the star's temperature
It depends on the star's color
It is ineffective for very distant stars
It can only be used for very bright stars
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What relationship is used to determine distances using Cepheid variable stars?
The relationship between color and temperature
The relationship between period and intrinsic luminosity
The relationship between mass and velocity
The relationship between size and brightness
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of stars are RR Lyrae?
Old-population stars
Young, massive stars
Stars with no variability
Stars with high rotation speeds
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a Type Ia Supernova?
A supernova occurring in a single massive star
A supernova in a binary system with a white dwarf
A supernova in a galaxy cluster
A supernova caused by a collision of two stars
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