The Local Group
A. is a supercluster.
B. has the Milky Way as its center.
C. contains about 30 member galaxies.
D. is the small cluster to which the Milky Way belongs.
E. None of these choices is correct.
Answer: D
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A(n) ____________________ is the largest known structure in the universe
Fill in the blank(s) with correct word
When the Martian springtime arrives and the daytime temperature reaches 20°C, what occurs?
a. Water melts and forms large pools of liquid. b. The polar ice caps disappear. c. Large planet-wide dust storms. d. The entire planet changes color.
Suppose two stars are separated in the sky by 0.1 arcseconds. If you take a picture of them with the SOAR telescope, which has an angular resolution of 0.6 arcsecond, what will you see?
A) one point of light that is the blurred image of both stars B) two separate points of light C) nothing at all
Although sunspots are cooler areas in the photosphere, when they increase in number that tells us the Sun is becoming more active
Indicate whether the statement is true or false