What is the purpose of the European CHEOPS mission?
A) to precisely measure the properties of known extrasolar planets
B) to discover new types of extrasolar planets unobservable with current instruments
C) to search for signals from alien civilizations
D) to search for new extrasolar planets throughout the entire sky
A
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A region in the Universe where there are almost no galaxies is called a ________.
A. void B. supermassive black hole C. dark nebula D. zone of avoidance
Galileo used a telescope to observe the phases of the Sun
a. True b. False Indicate whether the statement is true or false
A ball is thrown downward from the top of a building with an initial speed of 25 m/s. It strikes the ground after 2.0 s. How high is the building, assuming no air?
A) 20 m B) 30 m C) 50 m D) 70 m
Two mirrors are at right angles to one another. If an object is placed near the mirrors, what is the largest number of images that would be seen in the mirrors?
a. 3 b. 2 c. 4 d. 5 e. 6