UNIVERSE

The apparent daily motion of the sun caused by Earth's revolution around is called ______.

• annual motion

• diurnal motion

• retrograde motion

• precession of the equinoxes

The apparent motion of the stars as a result of Earth's rotation it is called____

• Annual Motion

• Diurnal Motion

• Retrograde Motion

• Precession of the Equinoxes

During what time of the year do we experience the shortest day and the longest night.

• Autumnal equinox

• Summer soltice

• vernal equinox

• winter soltice

How long is sidereal day?

• exactly 24 hours

• 23 hrs. 56 min.

• 23 hrs.56 mins.& 4 secs.

• 23 hrs.56 mins.&30 secs.

Earth's precession due to gravitational pull of the moon and the sun is called _____.

• Lunar precession

• Lunisolar precession

• precession of equinoxes

• solar precession

How many years does Earth require to complete a cycle of precession?

• 10000

• 15000

• 21000

• 26000

Who was credited for having discovered the precession of Earth?

• Aristotle

• Eratosthenes

• Galileo

• Hipparchus

Who was credited for determining the relative position of the sun, the moon, and the Earth during lunar and solar eclipse.

• Anaxagoras

• Eratosthenes

• Galileo

• Hipparchus

How many spheres were used by Eudoxus to model the Universe?

• 25

• 26

• 27

• 28

According to Aristotle, the celestial realm consisted of _____.

• air

• ether

• fire

• water