Stellar Properties

The angle of the apparent change in position caused by the "watcher" changing vantage points is

• relevant motion
• parallax
• reference
• distance modulus

A Parsec measures

• distance
• time
• speed
• light

The apparent brightness of a star is how bright the star appears 

• on Earth
• from the Sun
• from some standard far away distance

• at the star's surface

The measure of the brightness of a star is called the star's

• Brightness
• Luminosity
• Magnitude
• Light Square

Absolute Magnitude is a measure of the star's brightness at what distance?

• 10 A.U.
• 10 parsecs
• 10 light year
• 10 s.s.

Absolute Magnitude is directly related to a star's

• distance
• star constant
• luminosity
• composition

Which of the absolute magnitudes below designates the brightest star?

• 30
• 0.5
• -2
• -10

Based on the Inverse Square Law of Light, if I double my distance, the brightness

• decreases by a factor of 2
• decreases by a factor of 4
• increases by a factor of 2
• increases by a factor of 4

The total amount of energy a star emits per second is its

• luminosity
• temperature
• size
• mass

Luminosity depends on which two factors?

• size and temperature
• temperature and distance
• size and composition
• composition and distance