Which of the following best describes the meaning of declination and right ascension?
A) They are coordinates on the celestial sphere that are very similar to the coordinates of altitude and direction on Earth.
B) They are used to describe the locations and distances of stars that we see in the night sky.
C) They are coordinates on the celestial sphere, with declination telling us the angular distance of an object from the celestial equator and right ascension telling us how far around the celestial sphere an object is located from the vernal equinox.
D) They are terms used by astronomers to describe how the sky changes with the seasons.
C
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Compared to the terrestrial planets, Jovian planets
a. have a higher density. b. have a smaller number of moons. c. have a much larger diameters. d. are much hotter.
The Jovian problem refers to
a. the high speed with which the Jovian planets rotate on their axes. b. the large number of satellites that orbit each Jovian planet. c. the existence of rings around the Jovian planets. d. the excess heat radiated by the larger of the Jovian planets. e. the apparently short period of time that disks exist around stars from which Jovian planets can form.
A dense, hot body will give off a(n) ________ spectrum
Fill in the blank(s) with correct word
A small sports car collides head-on with a massive truck. Which vehicle experiences the greater acceleration?
1.the car 2.the truck 3.The accelerations are the same.