Chapter 3

In its path around the Sun, the axis of the Earth has an inclination:

• varying between zero and 23°27' with the plane of the path.

• of 66°33' with the plane of the path.

• varying with the season of the year

• of 23°27' with the plane of Equator

Observed from a position on the surface of the Earth the heavenly bodies (stars) seem to:

• not change their relative positions on the sky.

• move from west to east on the southern hemisphere.

• move from east to west on the northern hemisphere.

• move from east to west.

The term "sidereal" is used:

• to describe how two positions of heavenly bodies are located sideways on the sky.

• to describe conditions with reference to the moon.

• to describe a situation or relationship concerning the stars.

• to describe the time interval between two successive transits of the real apparent Sun at the same meridian.

What is the approximate date of perihelion, when the Earth is nearest to the Sun?

• Beginning of January.

• End of December.

• Beginning of July.

• End of March.

Evening civil twilight occurs between:

• sunset and 6 deg below the horizon.

• 6 deg and 12 deg below the horizon.

• 12 deg and 18 deg below the horizon.

• sunrise and sunset.

In which months is the difference between apparent noon and mean noon the greatest?

• November and February.

• January and July.

• March and September.

• June and December.

When it is 1000 Standard Time in Kuwait, the Standard Time in Algeria is:

• 0700

• 1200

• 1300

• 0800

On the 27th of February, at 52°S and 040°E, the sunrise is at 0243 UTC. On the same day, at 52°S and 035°W, the sunrise is at:

• 2143 UTC

• 0243 UTC

• 0743 UTC

• 0523 UTC

At 1200 Standard Time on the 10th July in Queensland, Australia, what is the Standard Time in Hawaii, USA?

• 1200 ST 10 July

• 1000 ST 10 July

• 1600 ST 09 July

• 0200 ST 10 July

What is the local mean time, position 65°25'N 123°45'W at 2200 UTC?

• 1345

• 2200

• 0615

• 0815