The star Arcturus shows a large proper motion, almost perpendicular to the galactic plane. What Population might we assume it belongs to, and why?
What will be an ideal response?
Question 2Cometary impacts with Jupiter
A) are impossible to observe from Earth.
B) are spectacular but do not teach us much.
C) have been observed from Earth at least twice.
D) are extremely rare.
E) would not be catastrophic if they happened on Earth.
Question 3What is the primary visible color of an emission nebula?
A) blue due to ionized helium atoms
B) red due to the H line of hydrogen
C) black, because of dust
D) blue from the scattering of light off the tiny molecules
E) red because of reddening by dust
Question 4If the Galactic Year is defined as the orbital period of the solar system, how long does it take us to circle the center? How do we know?
What will be an ideal response?
Question 5Jupiter and the other jovian planets are noticeably oblate because
A) their powerful gravity acts stronger on the closer poles than the distant equator.
B) they are fluid bodies that are spinning rapidly.
C) they are tidally distorted by the pulls for their satellite systems.
D) they all have strong magnetic fields that deform their shape.
E) All of the above are correct.
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