One of two identical buildings is nearby; the other is twice as far away as the first. The angular size of the more distant building is ________ the nearby building's angular size.
A. the same as
B. one half
C. two times
D. four times
E. one fourth
Answer: B
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We would expect other planets beyond our own solar system to orbit the equators of their home stars, as our own planets orbit the Sun
Indicate whether the statement is true or false
Which of the following best describes the Milky Way Galaxy?
A) a spiral galaxy with a disk about 100,000 light-years in diameter B) a spiral galaxy with a disk about 1 billion kilometers in diameter C) a spiral galaxy with a disk about 1000 light-years in diameter D) a spherically shaped galaxy that is about 4 light-years in diameter E) a spherically shaped galaxy that is about 100,000 light-years in diameter
How long did the Cambrian explosion last?
A) less than 1 year B) about a decade C) about 10,000 years D) about 20 million years E) about 500 million years
What evidence suggests that we live inside a hot local bubble?
What will be an ideal response?