Foundations of Astronomy

The _____ is where the Earth and sky appear to meet in the far distance and the _____ is the point on the celestial sphere directly over the head of the observer.

• horizon, azimuth

• altitude, zenith

• horizon, zenith

• altitude, azimuth

The angular distance of a celestial object above the horizon

• Altitude

• Latitude

• Longitude

• Angle of Isolation

For any observer the _____ is the point of the sky directly overhead.

• analemma

• azimuth

• zenith

• ecliptic

What is the altitude and azimuth of an object observed to be 10^o south of west, and 4, 10^o sized fists above the horizon?

• 10^o azimuth, 4^o altitude

• 260^o azimuth, 40^o altitude

• 180^o azimuth, 90^o altitude

• 280^o azimuth, 40^o altitude

Which terms are used in the equatorial coordinate system?

• azimuth, altitude

• azimuth, declination

• declination, right ascension

• right ascension, altitude

The Earth's axis changes direction (but the angle does NOT change).

• Rotation

• Precession

• Barycenter

• Revolution

instrument used to determine altitude of an object

• Compass

• Periscope

• Telescope

• Astrolabe

The Greek word planetes from which we get the word planet means...

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In the 3rd C BCE I proposed that the planets revolved around the sun. I am...

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I am a Danish astronomer born in 1546. I made observations of the Son, Moon, stars and planets. I am ...

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