ESC422-Astronomy and Navigation Quiz-ซ่อมสอบย่อย

What is the celestial sphere?

• A physical sphere around the Earth

• An imaginary sphere representing the night sky

• The Earth's atmosphere

• A model of the solar system

The ecliptic (line) is best described as:

• The path the Sun appears to take across the celestial sphere

• The Earth's orbit around the Sun

• The division between the night and day sky

• The outer edge of the Milky Way

The celestial equator is:

• The Earth’s equator projected onto the celestial sphere

• A circle passing through the celestial poles

• The path the Moon takes around the Earth

• The largest circle on the celestial sphere

The length of a pole's shadow (เงาของเสา) at noon (the time that Sun pass the Meridian) can help determine:

• The time of day

• The pole's height

• The observer’s latitude

• The direction of the Sun

Latitude is best described as:

• Distance east or west of the Prime Meridian

• Angular distance north or south of the Equator

• The angle of the North Star above the horizon

• The length of the day

Longitude is measured in:

• Degrees north or south

• Degrees east or west from Prime Meridian

• Kilometers from the Equator

• Time zones

Which star is most commonly used for navigation in the Northern Hemisphere?

• Sirius

• Betelgeuse

• Polaris (North Star)

• Vega

How can the position of the Sun be used in navigation?

• To determine local noon

• To find the North Star

• To measure the depth of the ocean

• To predict weather

What is a constellation?

• A group of planets

• A pattern of stars recognized in the night sky

• A region of the Milky Way

• A type of nebula

The Big Dipper is an example of a/an:

• Asteroid

• Asterism

• Galaxy

• Comet