The wind speeds found in the bands and zones of Saturn, compared to those on Jupiter, are about:
A) 3 times faster.
B) 2 times faster.
C) the same.
D) 2 times slower.
E) 3 times slower.
A
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This image shows a colliding pair of galaxy clusters known together as the Bullet Cluster. The blue region represents a map of the cluster's dark matter. How was this blue map made?
A) The blue region was inferred from studies of how the cluster causes gravitational lensing of objects located behind it. B) The blue region represents X-ray emission from hot gas within the cluster. C) The blue region represents previously unknown radio emission from the dark matter. D) The blue region comes from the combined light of many young stars drawn together by the cluster's dark matter.
The identification of "spiral nebulae" as large groupings of stars outside of our own galaxy was proven by ____
a. photographic plates made by Edwin Hubble showing stars and Cepheid variables b. the results of the Shapley-Curtis debate c. Immanual Kant's "island universe" theory d. William Parsons' observation and description of their spiral structure e. Harlow Shapley's observations of their radio spectrum
How far above and below the celestial equator can the Sun move?
What will be an ideal response?
An object in motion tends to remain in motion
A) because of a force within the object. B) only when an external force acts on it. C) without the need of a force. D) due to its nature.