Stars and the Sun
Absolute and Apparent Magnitude
Size of a Star
Color of a Star
Vocabulary
100
What is a star?
A star is a large celestial body that is composed of gas and emits light.
100
Faint stars have what kind of magnitude numbers: Positive or Negative?
Faint stars have positive kind of magnitude numbers.
100
Stars can be about the same size as or larger than what?
Stars can be about the same size as or larger than Earth.
100
What is a blackbody?
A blackbody is a star's color that depends only on temperature.
100
What is a star?
A star is a late celestial body that is composed of gas and emits light.
200
The sun contains what kinds of gases?
The sun contains hydrogen, helium, oxygen, carbon, neon, and iron
200
Bright stars have what kind of magnitude numbers: Positive or Negative?
Bright stars have negative kind of magnitude numbers
200
How are sizes of stars measured?
Sizes of stars are measured using solar radii.
200
What are the temperatures of stars when their colors are BLUE, BLUE-WHITE, and WHITE.
BLUE: Above 25,000*C BLUE-WHITE: 10,00-25,000*C WHITE: 7,500-10,00*C
200
What are multiple stars or multiple star systems?
Three or more stars that are bound together by gravity are multiple stars or multiple star systems.
300
What is the average temperature of the photosphere?
The average temperature of the photosphere is 5,527*C
300
What star is more luminous than the sun?
Siriusis is more luminous than the sun.
300
Astronomers have indirectly measured what?
Astronomers have indirectly measured the dimensions of the sun.
300
What are the temperatures of a star when it's color is YELLOW-WHITE, YELLOW, and ORANGE?
YELLOW-WHITE: 6,000-7,500*C YELLOW: 5,000-6,000*C ORANGE: 3,500-5,000
300
What is apparent magnitude?
Apparent Magnitude is the measure of a star's brightness as seen from earth.
400
The sun's outer layer can reach to what temperature?
The sun's outer layer can reach to 2,000,000*C
400
What is First Magnitude?
First Magnitude are the brightest stars.
400
What are rare extremely large stars that have sizes up to 1,000 solar radii?
Supergiants are rare extremely large stars that have sizes up to 1,000 solar radii.
400
What is the Temperature of a star when its color is RED?
RED: 3,500 And Below
400
What is luminosity?
Luminosity is the actual brightness of a star.
500
Stars may be how much as large as the sun or as much as how many times as large as the sun?
Stars may be 1/100 as the sun or as much as 1,000 times as large as the sun.
500
What is sixth magnitude?
Sixth Magnitude is the faintest stars.
500
Name the three types of stars.
White Dwarfs, Giant Stars and Supergiants
500
Differences in color are due to differences in what?
Differences in color are due to differences in surface temperatures.
500
What is absolute magnitude?
Absolute Magnitude is a measure of how bright a star would be if the star were located at a standard distance.
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