What Is A Star
How Is Star Brightness Measured
How Is Star Luminosity Measured
How Are The Surface Temperatures Of Stars Measured
How Are The Sizes Of Stars Measured
100
What are the components of the sun?
Oxygen, carbon, neon, and iron.
100
What is the apparent magnitudes of the faintest star on a scale through telescope?
+30
100
What is the apparent magnitude of the sun?
-26.8
100
The temperature of a red star is____? (more or less than a blue star?)
Less than a blue star
100
What is the radius of the sun?
Approximately 695,000 kilometers or about 109 times the the radius of Earth.
200
What is the temperature of the core of the sun?
15,000,000 Degrees C
200
What is the apparent magnitude of the brightest stars on a scale?
-2
200
What does luminosity mean?
The actual magnitude.
200
Why do star colours vary?
Differences in the star colours are due to the surface temperature.
200
What is the size of a white dwarf?
It can be expressed by 0.01 solar radius.
300
What is the average temperature of the photosphere of the sun?
5,527 degrees C
300
What is apparent magnitude?
The measure of a star's brightness as seen from earth.
300
What is another word/phrase for luminosity?
Absolute magnitude.
300
What is the surface temperature of a blue star?
Above 25,000 degrees Celsius.
300
What do astronomers use to measure the size stars?
They compare to the sun.
400
In comparison to other stars, how bright is the sun?
Not bright at all
400
What apparent magnitude does the star Sirius have?
-1.46
400
What is the sun's absolute magnitude?
+4.8
400
If an object's colour depends on its temperature, what is it called?
A blackbody.
400
What are very large stars called?
Giant stars.
500
What does the core of a star do?
Converts matter into energy.
500
Why does the star Sirius, have a fainter apparent magnitude than the sun?
The sun is closer to Earth.
500
What is Sirius' absolute magnitude?
+1.4
500
What is the surface temperature of a red star?
Below 3,500 degrees Celsius.
500
What colours are supergiants often?
Red or blue.
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