ASTR 100 EXAM 1 REVIEW

At approximately what times does the waxing gibbous moon set?

• 3 pm

• 6 pm

• 9 pm

• Midnight

• 3 am

The nightly motion of objects across our the sky is caused by?

• Revolution of Earth around the Sun

• Rotation of the whole celestial sphere of stars around the fixed Earth.

• Rotation of Earth on its axis

• Motion of the solar system around the galaxy.

If the nearest star is 4.2 light-years away, then

• the star is 4.2 million AU away.

• the light we see left the star 4.2 years ago.

• the star must have formed 4.2 billion years ago.

• the star must be very young.

• the star must be very old.

In what region of Earth would you have to be to have the Sun pass through your zenith at some time during the year?

• Within the Arctic or Antarctic Circle

• At any latitude at noon every day

• Within +/- 23.5 degrees of the equator (i.e. in the tropics)

• Only on the equator, nowhere else

The diagram illustrates the geometry of lunar phases with the moon shown in 8 positions in its orbit. Which numbered position is a new moon?

• 1

• 2

• 3

• 4

• 5

In the picture, the phase of the moon is ...

• Waning gibbous

• Half Moon

• Waxing crescent

• First quarter

• Third quarter

At approximately what time does the waning gibbous moon rise?

• 3 pm

• 6 pm

• 9 pm

• Midnight

• 3 am

What is the ecliptic?

• Band of constellations through which the Sun and Moon move in our sky.

• Line in the sky that is perpendicular to Earth's spin axis.

• Line traced in our sky by the Moon each month against the background stars

• 
  Line traced in our sky by the Sun over one year against the background stars.

In the picture, the phase of the moon is?

• Waxing gibbous

• Waxing cresent

• Full

• Third quarter

• Waning gibbous

At approximately what time is the waxing crescent moon highest in the sky?

• 3 am

• 6 am

• 9 am

• Noon

• 3 pm