The point in the sky directly above an observer's head is called the ______________
Fill in the blank(s) with correct word
zenith
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Which space mission orbited Saturn and dropped a probe into Saturn's atmosphere?
a. Pioneer b. Voyager c. Galileo d. Cassini-Huygens e. New Horizons
Conservation of Momentum: A 14,000-kg boxcar is coasting at 1.50 m/s along a horizontal track when it suddenly hits and couples with a stationary 10,000-kg boxcar. What is the speed of the cars just after the collision?
Fill in the blank(s) with the appropriate word(s).
The most accurate Greek attempt to explain planetary motion was the model of:
A) Aristotle. B) Pythagoras. C) Hipparchus. D) Ptolemy. E) Erastothenes.
When we look at pictures of distant objects in the universe, the images of the objects often are distorted by gravitational lensing
Indicate whether the statement is true or false