Astronomy 1

1.

1 point

When the Moon is directly opposite the Sun in the sky, its phase is

waxing or waning crescent.

full.

new.

waxing or waning gibbous.

first or third quarter.

2.

1 point

Latitude and right ascension are coordinate systems used to find objects on the celestial sphere.

True

False

3.

1 point

What are constellations?

A number of galaxies gravitationally bound and close together in the sky.

Ancient story boards, useless to modern astronomers.

A number of stars gravitationally bound and appearing close together in the sky.

A number of stars making an apparent pattern in the celestial sphere.

Apparent groupings of stars and planets visible on a given evening.

4.

1 point

The time for the Moon to orbit Earth, relative to the stars is

about 7 days.

23 hours, 56 minutes.

29.5 days.

18 years, 11.3 days.

27.3 days.

5.

1 point

A star with a declination of +60.0 degrees will be

north of the celestial equator.

west of the vernal equinox.

south of the celestial equator.

None of these answers are correct.

east of the vernal equinox.

6.

1 point

If Scorpius is now prominent in the summer sky, in 13,000 years it will be best seen

in the autumn.

in the spring sky.

It will not be visible then at all. All of its stars will have vanished by then.

in the winter sky.

at the same season; the heavens do not change.

7.

1 point

In the sky, declination is measured in degrees north or south of the celestial equator.

True

False

8.

1 point

There are 3,600 arc seconds in a degree.

True

False

9.

1 point

Into how many constellations is the celestial sphere divided?

44

110

12

57

88

10.

1 point

The synodic month is

the basis of the year we use in our modern calendar.

caused by both the Earth's and Moon's rotations.

29.5 days.

about two days shorter than the sidereal month.

based on the Moon's position relative to the stars.

11.

1 point

That Polaris will not always be the pole star is due to

precession shifting the celestial pole.

the Solar winds blowing the Earth farther away from the Sun.

the Earth's revolution being slightly less than exactly 365.25 days.

the sidereal day being shorter than the solar day.

the Moon following the ecliptic, instead of the equator.

12.

1 point

You note that a particular star is directly overhead. It will be directly overhead again in

23 hours 56 minutes.

12 hours.

24 hours.

1 hour.

24 hours 4 minutes.

13.

1 point

The south celestial pole is located at a declination of -90 degrees.

True

False

14.

1 point

The fact that the Earth has moved along its orbit in the time it took to rotate once is the reason for

the position of the Celestial Equator.

the difference between solar and sidereal time.

Earth's 23.5-degree tilt.

precession.

seasons.

15.

1 point

The twelve constellations the solar system bodies move through are the

signs of the zodiac.

equatorial constellations.

galactic equator.

stages of heaven.

nodes of the ecliptic.

16.

1 point

Over 20,000 stars are visible to the naked eye on the darkest, clearest nights.

True

False