Luminosity and Brightness

Which property of a star is the brightness of a star at a standard distance?

• Apparent (magnitude) brightness
• Absolute (magnitude) brightness
• Luminosity
• Size of the star

In comparison to other stars in the sky, the Sun appears brighter because it is–

• Bigger

• Smaller

• Nearer

• Further

Tags

NGSS.MS-ESS1-1

The color of a star depends on its

• size
• temperature
• shape
• magnitude

What color of star is the coolest?

• Red
• Yellow
• Blue
• White

The brightness of a star as seen from Earth is its 

• apparent brightness.
• absolute brightness.
• parallax.
• reflective brightness.

Tags

NGSS.HS-PS4-3

A very bright star can seem to be dimmer because it is 

• further away
• cooler in temperature
• very close
• batteries are dying

As the _________ of a star increases, luminosity increases.

• size

• distance

• age

• composition

The luminosity of a star describes its ______________.

• energy

• temperature

• age

• color

Parsec

• the brightness of a star as seen from Earth have at a distance of 32.6 light-years from Earth Luminosity The actual brightness of a star
• A unit of distance that is equal to 3.26 light years
• the brightness that a star would have at a distance of 32.6 light-years from Earth
• The actual brightness of a star

Luminosity

• the brightness of a star as seen from Earth have at a distance of 32.6 light-years from Earth Luminosity The actual brightness of a star
• the brightness that a star would have at a distance of 32.6 light-years from Earth
• The energy output of the star

• the location on the H-R diagram where most stars lie