This photo shows an object located in the halo of our Milky Way galaxy. Notice the many bright red dots in the photograph. What are they?
A) red giant stars
B) cool, red main-sequence stars of spectral type M
C) old white dwarf stars that have turned red in color
D) massive supergiant stars
E) starspots
A) red giant stars
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If the universe is closed and finite, then
a. the universe will expand forever b. the universe has a center c. the universe has an edge d. none of the above
A student sees her physical science professor approaching on the sidewalk that runs by her dorm. She gets a water balloon and waits. When the professor is 2.0 s from being directly under her window 11 m above the sidewalk, she drops the balloon. You Finish the story.
The results of statistical studies of the exoplanet systems discovered to date suggest that
A) planets are common B) small planets outnumber large plates by a significant margin C) Earth-size planets are very common D) all of these are true
A certain disk can store 600 megabytes of information. If an average word requires 9.0 bytes of storage, how many words can be stored on one disk?
A) 6.7 × 107 words B) 5.4 × 109 words C) 2.1 × 107 words D) 2.0 × 109 words