A star with a large parallax
A) is at a great distance from Earth.
B) is moving at a great speed with respect to Earth.
C) is at a short distance from Earth.
D) is moving at a slow speed with respect to Earth.
E) is not moving with respect to Earth.
Question 2The pattern of rising hot gas cells all over the photosphere is called
A) filaments.
B) granulation.
C) sunspots.
D) convective projections.
E) prominences.
Question 3What is the eventual fate of a brown dwarf?
A) It remains the same forever.
B) It gradually cools down and becomes ever dimmer.
C) It gradually contracts and heats up until nuclear fusion ignites in its interior and it becomes a faint star.
D) It becomes ever denser and hotter until it becomes a white dwarf.
E) Gravity ultimately wins and it becomes a small black hole.
Question 4How are T Tauri stars characterized observationally?
A) by sudden changes in their brightness
B) by very high temperatures
C) by very high magnetic fields and large starspots
D) by very rapid rotation
E) They are newly-formed stars that are short period binaries.
Question 5The orbits of most comets:
A) are like the planets, fairly circular and in the ecliptic plane.
B) lie almost entirely beyond the orbit of Neptune.
C) have perihelions within the orbits of Mercury.
D) go no farther out than Pluto, then return to the Sun again.
E) are shorter than the 76 year period for Comet Halley.
Question 6Spiral arms are thought to be sites of ________, based on the observations of red HII regions and blue-white OB associations in and around these features.
Fill in the blank(s) with correct word
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