Amy, Brad, and Cate are walking (or running) along a straight line as represented below
2
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For measuring the distances to galaxies within 17 Mpc, we rely primarily on ________ variable stars
Fill in the blank(s) with correct word
The speed of a comet in its orbit around the Sun is ______________ when its distance from the Sun is greatest (aphelion)
a. zero b. reversed c. greatest d. least
The North star is a star in the constellation of Ursa Minor, which lies just above the North pole of Earth. Which of the following is FALSE?
A) There are 12 Zodiac constellations. B) The Zodiac constellations are not located just above the North pole of Earth. C) The Zodiac constellations are not located just above the South pole of Earth. D) Ursa Minor is a Zodiac constellation. E) Ursa Minor is not a Zodiac constellation.
The leveling of the Earth's surface is known as ______________
Fill in the blank(s) with correct word