Universe Study Review

Which star has the lowest temperature?

• A
• B
• C
• D

Which star is considered a Main Sequence Star?

• A
• B
• C
• D

What type of galaxy is this?

• Spiral
• Elliptical
• Irregular 
• Irrational

A light year is...

• The speed light travels
• How long it takes light to get to you from the sun
• The distance light can travel in a year
• How many years it takes light to be emitted

Which star has the lowest luminosity?

• A
• B
• C
• D

Which term describes a group of stars?

• planet
• galaxy
• universe
• solar system

Space exploration has advanced our knowledge of the universe. Which space journey would take the longest?

• a journey from Earth to the sun
• a journey from Earth to the moon
• a journey from Earth to a star in the constellation Centaurus
• a journey from Earth to the farthest planet in our solar system Neptune

Sergio joins the astronomy club. During a trip to the observatory, the members of the astronomy club observe several different stars. Sergio records information about some of the stars in her journal.  Of the following four stars, which star should Sergio label as the hottest?

• Wolf, red
• Ceti, yellow
• Cygni B, orange
• Vega, blue-white

An astronomer uses a telescope to observe a star. She observes that the color of this star is similar to the color of the sun.  Therefore, she infers that the star and the sun have similar sizes and surface temperatures. Using this information, what can the astronomer conclude about the star?

• The star is a white dwarf.
• The star is medium sized.
• The star is hotter than most other stars in our galaxy.
• The star is brighter than most other stars in our galaxy.

The sun is much larger than the moon.  However, as viewed from Earth, the sun and moon appear to be the same size. Why do the sun and moon appear to be the same size when viewed from Earth?

• The moon is much hotter than the sun is.
• The moon is much denser than the sun is.
• The moon is much brighter than the sun is.
• The moon is much closer to Earth than the sun is.