About how long does it take our solar system to complete one orbit around the center of the Milky Way Galaxy?

A) 10,000 years
B) 1 million years
C) 230 million years
D) 4-1/2 billion years
E) 14 billion years


C) 230 million years

Physics & Space Science

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If a star were moved 10 times farther away, its absolute magnitude would drop five magnitudes

Indicate whether the statement is true or false

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You observe a star cluster with a main-sequence turn-off point at spectral type G2 (the same spectral type as the Sun). What is the age of this star cluster?

A) 4.6 billion years B) 10 billion years C) 10,000 years D) 100 billion years E) You also need to know the luminosity class of the turn-off point to determine the age.

Physics & Space Science

The type of EM radiation emitted when high speed electrons decelerate as they are smashed into a metal target is

a. ultraviolet b. infrared c. x ray d. microwave e. gamma ray

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Heat normally flows from objects of high

A) internal energy to objects of low internal energy. B) temperature to objects of low temperature. C) both of these D) neither of these

Physics & Space Science