Question and answer
Which unit do astronomers use for angular measurement? A. parallax B. arcsecond C. parsec D. light-year
Astronomers use arcsecond for angular measurement.
Expert answered|matahari|Points 57734|
Question|Asked by amandameiners11
Asked 1/18/2018 7:12:28 PM
Updated 1/18/2018 9:57:50 PM
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This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [1/18/2018 9:57:50 PM]
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Questions asked by amandameiners11
What is a light-year equal to? A. the distance light travels in one year B. the time it takes light to travel 10 trillion kilometers C. the mean distance between the Sun and the center of our galaxy D. the time it takes our solar system to orbit the center of our galaxy
Question|Asked by amandameiners11
Updated 1/18/2018 9:56:44 PM
1 Answer/Comment
A light-year equal to - the time it takes light to travel 10 trillion kilometers.
Added 1/18/2018 9:56:44 PM
This answer has been confirmed as correct and helpful.
Which law states that the orbit of each planet is elliptical and that the Sun is at one focus of each ellipse? A. Kepler's first law B. Kepler's second law C. Kepler's third law D. Newton's law of universal gravitation
Weegy: Kepler's first law states that the orbit of each planet is elliptical and that the Sun is at one focus of each ellipse. (More)
Question|Asked by amandameiners11
Expert Answered
Updated 1/18/2018 9:52:57 PM
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Which of Kepler's laws of planetary motion can be derived from Newton's law of universal gravitation? A. Kepler's first law B. Kepler's second law C. Kepler's third law D. Kepler's fourth law
Question|Asked by amandameiners11
Updated 1/18/2018 9:51:56 PM
1 Answer/Comment
Kepler's third law can be derived from Newton's law of universal gravitation.

Added 1/18/2018 9:51:56 PM
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What is the approximate age of our solar system? A. 4.6 trillion years B. 4.6 billion years C. 4.6 million years D. 4,600 years
Question|Asked by amandameiners11
Not Answered
Updated 1/18/2018 8:44:40 PM
1 Answer/Comment
The age of our solar system is 4.6 billion years old.
Added 1/18/2018 8:44:40 PM
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Confirmed by jeifunk [1/18/2018 9:42:51 PM]
Scientists hypothesize that a large, planet-sized object collided with Earth about 4.5 billion years ago and that this impact formed A. the Moon. B. asteroids. C. comets. D. Mars.
Question|Asked by amandameiners11
Not Answered
Updated 1/18/2018 9:50:01 PM
1 Answer/Comment
Scientists hypothesize that a large, planet-sized object collided with Earth about 4.5 billion years ago and that this impact formed THE MOON.
Added 1/18/2018 9:50:01 PM
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