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WorksheetsAbout the Star
Total questions: 11
Worksheet time: 11mins
The brightness of a star as seen from Earth is its
apparent magnitude
absolute brightness.
parallax.
reflective brightness.
Which of the following stars would be seen as the brightest star?
Alpheratz, which has an apparent magnitude of 2
Alcyone, which has an apparent magnitude of 3
Deneb, which has an apparent magnitude of 1
Sirius, which has an apparent magnitude of -1
Which star is the brightest based on APPARENT magnitude?
Sun
Sirius
Vega
Polaris
Brightness determined by DISTANCE from the earth
Amazing magnitude
Absolute magnitude
Apparent magnitude
Awesome magnitude
In comparison to other stars in the sky, the Sun appears brighter because it is–
Bigger
Smaller
Nearer
Further
What is the difference between apparent brightness and absolute brightness?
Apparent brightness is how bright a star appears from Earth, while absolute brightness is how bright it actually is at a standard distance.
Apparent brightness is the actual brightness of a star, while absolute brightness is how bright it appears from Earth.
Apparent brightness is measured in watts, while absolute brightness is measured in lumens.
Apparent brightness is only applicable to stars within our galaxy, while absolute brightness applies to all stars.
Why might a star with high absolute brightness appear dim to an observer on Earth?
It is very far away from Earth.
It is moving away from Earth at high speed.
It is surrounded by a thick cloud of gas.
It is a very small star.
Order the stars from brightest to dimmest based on ABSOLUTE brightness.
A, B C, D
D, C, B, A
D, C, A, B
A, D, C, B
What is the brightness of Rigel as seen from Earth?
-1.46
-8.1
0.12
0.85
Which star has lowest surface temperature ?
A
B
C
D
Why aren't there any green stars?
There are no green stars in the universe
The atmosphere absorbed the green color
The eyes of human beings are not sensitive to seeing green color
