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.
Scientists hypothesize that a large, planet-sized object collided with Earth about 4.5 billion years ago and that this impact formed THE MOON.
Updated 1/18/2018 9:50:01 PM
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Scientists hypothesize that a large, planet-sized object collided with Earth about 4.5 billion years ago and that this impact formed THE MOON.

Which unit do astronomers use for angular measurement? A. parallax B. arcsecond C. parsec D. light-year
Weegy: Astronomers use arcsecond for angular measurement. (More)
Updated 1/18/2018 9:57:50 PM
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
Updated 1/18/2018 9:56:44 PM
A light-year equal to - the time it takes light to travel 10 trillion kilometers.
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)
Updated 1/18/2018 9:52:57 PM
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
Updated 1/18/2018 9:51:56 PM
Kepler's third law can be derived from Newton's law of universal gravitation.

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
Updated 1/18/2018 8:44:40 PM
The age of our solar system is 4.6 billion years old.
Confirmed by jeifunk [1/18/2018 9:42:51 PM]
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