Why do disks form around young stars?
A) The surrounding gas can only approach the star from a single direction.
B) Collisions between gas particles flatten the rotating gas cloud.
C) The rotation of the cloud causes gas to be spun outward from the central star.
D) Intense winds from nearby massive stars flatten the gas cloud.
B) Collisions between gas particles flatten the rotating gas cloud.
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One of the advantages of charge-coupled devices over photographic plates is that a CCD can record bright and faint objects on the same exposure
Indicate whether the statement is true or false
Uniform Circular Motion: If you swing a bucket of water fast enough in a vertical circle, at the highest point the water does not spill out. This happens because an outward force balances the pull of gravity on the water.
A. True B. False
How was the first asteroid discovered?
A. Newton inferred their existence by their gravitational influence on Jupiter. B. Kepler traced back the path of meteors to the Asteroid belt. C. Galileo saw it whiz by Jupiter. D. It collided with the Moon. E. Piazzi found it by searching for objects at the distance suggested by Bode's law.
The clouds of Earth often generate rain storms on the Earth's surface. Is this true of Venus? Why or why not?
What will be an ideal response?