Astronomy Final Review

You note that a particular star is directly overhead. It will be directly overhead again in A) 24 hours. B) 23 hours 56 minutes. C) 1 hour. D) 24 hours 4 minutes. E) 12 hours.

23 hours 56 minutes.

The time for the Moon to orbit Earth, relative to the stars is A) about 7 days. B) 29.5 days. C) 23 hours, 56 minutes. D) 27.3 days. E) 18 years, 11.3 days.

27.3 days.

The synodic month is A) the basis of the year we use in our modern calendar. B) about two days shorter than the sidereal month. C) 29.5 days. D) caused by both the Earth's and Moon's rotations. E) based on the Moon's position relative to the stars.

29.5 days.

Into how many constellations is the celestial sphere divided? A) 44 B) 12 C) 57 D) 110 E) 88

88

In the scientific method, it is not necessary to test your theory.

False

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

False

What are constellations? A) Apparent groupings of stars and planets visible on a given evening B) Groups of stars gravitationally bound and appearing close together in the sky. C) Groups of stars making an apparent pattern in the celestial sphere. D) Ancient story boards, useless to modern astronomers. E) Groups of galaxies gravitationally bound and close together in the sky.

Groups of stars making an apparent pattern in the celestial sphere.

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

True

Increasing the baseline will increase the parallax angle.

True

The celestial sphere is divided into 88 modern constellations.

True

The larger the parallax shift, the closer an object is to us.

True

The parallax shift for all stars is very small.

True

There are 3,600 arc seconds in a degree.

True

The 26,000 year cycle that changes the poles and equinoxes is called A) a retrograde loop. B) regression. C) revolution. D) the Earth's rotation. E) precession.

precession.

This diagram explains... https://drive.google.com/drive/u/0/folders/0B9znq-gUquJAMkpkdTdEenNuaTA A) the difference between solar time and sidereal time. B) the sidereal day's relation to the seasons. C) the solar day's relation to the Moon. D) the reason for the solstices. E) precession.

the difference between solar time and sidereal time.