Pluto was discovered-hypothesis for the existence

Reference no: EM13521353

1. Pluto was discovered

A) as a streak on a photographic plate
B) because it moved between the time that two photos were taken
C) because it appears as a disk in a photo, while stars appear as dots
D) [both a and b above]
E) [both b and c above]

2. The Leonid meteor shower is named after the constellation Leo because the

A) Particles actually originate in that constellation
B) Particles enter the atmosphere in a shape similar to the constellation
C) Meteors spread out as they approach Earth
D) Meteors appear to come from the direction of the constellation Leo

3. Which of the following has the greatest size?

A) The coma of a comet
B) A meteorite
C) A meteoroid
D) No general statement can be made

4. The hypothesis for the existence of the Oort cloud was based on the (I KNOW ITS NOT B)

A) Fact that all observed comets are gravitationally bound to the sun
B) Clustering of the long-period comets’ aphelia distances around 50,000AU
C) Observation that as new long-period comets enter the inner solar system, they show no preferential direction from which the come
D) [both a and c above]
E) [all of the above]

Reference no: EM13521353

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