Exam 21: Origin of Modern Astronomy

It takes about 27 days for the Moon to go around Earth, which is also the time required to complete the phases of the Moon.

The first modern astronomer to propose a Sun-centered universe was ________.

Earth is closest to the Sun in the month of ________.

The length of daylight on the Moon is about one month.

The two primary motions of the Earth are ________ and ________.

The first scientist to use a telescope for astronomical purposes was ________.

The apparent westward drift of the planets as compared to the background stars is called ________.

The apparent annual path of the Sun upon the celestial sphere is called the ecliptic.

Word Analysis. Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. Choose the option which does not fit the pattern.

This scientist's discovery was used to predict the next coming of Halley's Comet.

The planets stay in orbit around the Sun because of a balance between ________ and ________.