Star Brightness

If you see a light that is dimmer in the sky and twinkling, it is probably a ______________.

• star

• planet

• asteroid

True or False: The sun appears very bright because it is hotter than other stars.

• True

• False

How bright a star looks to observers on Earth is its....

• true brightness

• apparent brightness

What two factors affect the brightness of a star?

• distance

• color

• shape

• radiant energy given off

A star's brightness is directly dependent on the star's what?

• The size of the star- the smallest stars are the brightest

• The size of the star- the biggest stars are the brightest

• The age of the star - the middle aged stars are ALWAYS the brightest

• The age of the star- the youngest stars are the LEAST bright

Brightness of a star as seen from Earth

• parallax

• apparent magnitude

• absolute magnitude

• spectrum

What is the term for the brightness of a star as seen from Earth?

• Absolute magnitude

• Luminosity

• Apparent magnitude

• Radiance

With the use of the Hubble Space Telescope, scientist recently discovered a giant runaway star.  It is 90 times larger than the sun and is very hot and blue-white in color.  Why does the sun appear to be brighter than this runaway star when viewed from Earth?

• The sun is a different color than the runaway star.

• The sun is older than the runaway star. 

• The sun is closer to Earth than the runaway star. 

• The sun is made of different elements than the runaway star. 

With the use of the Hubble Space Telescope, scientist recently discovered a giant runaway star. It is 90 times larger than the sun and is very hot and blue-white in color. Why does the sun appear to be brighter than this runaway star when viewed from Earth?

• The sun is a different color than the runaway star.

• The sun is older than the runaway star.

• The sun is closer to Earth than the runaway star.

• The sun is made of different elements than the runaway star.

With the use of the Hubble Space Telescope, scientist recently discovered a giant runaway star.  It is 90 times larger than the sun and is very hot and blue-white in color.  Why does the sun to be brighter than this runaway star when viewed from Earth?

• The sun is a different color than the runaway star.

• The sun is older than the runaway star. 

• The sun is closer to Earth than the runaway star. 

• The sun is made of different elements than the runaway star.