Questions on Celestial Coordinate System

4827 words 20 pages
1. As seen from temperate or tropical latitudes, the positions of the constellations shift gradually westward in the sky from night to night because

(a) the Earth rotates on its axis.

(b) the Earth revolves around the Sun.

(c) the tilt of the Earth’s axis changes.

(d) their right ascensions constantly change.

(e) their declinations constantly change.

2. A star cluster in which the individual stars do not show a striking central concentration nor an orderly pattern or structure is called

(a) a thin cluster.

(b) an open cluster.

(c) a nebulous cluster.

(d) a globular cluster.

(e) a random cluster.

3. An average star such as our Sun will, it is believed, eventually end up as

(a) a blue dwarf.

(b) a
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latitude.

(b) the equator and 66.5°N. latitude.

(c) the equator and 23.5°S. latitude.

(d) the equator and 66.5°S. latitude.

(e) none of the above.

19. By definition, living things generally

(a) act against entropy.

(b) distribute energy throughout the Cosmos.

(c) produce ionizing radiation.

(d) convert oxygen into carbon dioxide.

(e) give off energy in the form of heat.

20. Suppose that you are located at 45° north latitude. It is late January. At exactly 6:00 . local time, you see a star at the zenith. Where will the star be at 6:00 ., 12 hours later?

(a) On the southern horizon

(b) On the northern horizon

(c) On the western horizon

(d) On the eastern horizon

(e) Below the horizon, at the nadir

21. The rate at which time “flows” depends on

(a) absolute position in space.

(b) the intensity of the gravitational field.

(c) the speed of light.

(d) the intensity of Earth’s magnetic field.

(e) all of the above.

22. The Kuiper belt contains an abundance of

(a) radiation from Earth’s magnetic field.

(b) radiation from Jupiter’s magnetic field.

(c) high-speed particles from the Sun.

(d) comets.

(e) meteors and asteroids.

23. The surface of Venus is

(a) cold, dark, and icy.

(b) an ocean of liquid methane and ammonia.

(c) hot, dry, and under enormous pressure.

(d) a mystery because of the clouds that shroud the planet.

(e)

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