Kepler's three laws of planetary motion were useful but not considered fully explained until
A. Galileo developed the telescope for astronomical observation.
B. Pythagoras developed his famous theorem about right triangles and the Golden Ratio.
C. Vivaldi composed his astronomical concerto, "The Four Seasons."
D. Newton introduced the law of universal gravitation for astronomical and terrestrial objects.
Answer: D
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Identify a true statement about Population II stars
A) Most of them are post-main sequence stars. B) They are located in the disk component of the galaxy. C) Most of them follow elliptical orbits. D) They have higher metal content than Population I stars.
Spiral and irregular galaxies have active star formation
a. True b. False Indicate whether the statement is true or false
Reflecting telescope objectives here on Earth do not have a problem with
a. "seeing". b. diffraction. c. color fringes on the image. d. All of the other choices are correct.
Escape Speed: The value of g at the surface of the spherical Asteroid X is 0.0060 m/s2 and the escape velocity is 10.1 m/s. What is the mass of this asteroid? (G = 6.67 × 10-11 N ? m2/kg2)
A. 2.3 × 1016 kg B. 3.5 × 1012 kg C. 6.5 × 1015 kg D. 4.9 × 1014 kg E. 6.7 × 1013 kg