The two different kinds of surveys that have given astronomers great insight into the structure and expanse of the universe are:
A) pie slice and pencil beam.
B) pie slice and redshift survey.
C) pencil beam and deep imaging.
D) pie slice and local surveys.
E) deep space survey and pencil beam.
A
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The Sun crosses the celestial equator going northward at the point called the _____
A) summer solstice B) autumnal equinox C) winter solstice D) vernal equinox
Thin Lenses: A statue that is 10.4 cm tall is placed 4.8 cm in front of a concave lens. The image is 4.0 cm from the lens. How tall is the image?
A. 13 cm B. 8.7 cm C. 5.4 cm D. 1.8 cm
In the second step of the p-p fusion chain, light helium is formed by the fusion of a ______________ with a __________. A byproduct of the reaction is a ____________
Fill in the blank(s) with correct word
Addition of an electron to an atom leaves a
a. neutron. b. positive ion. c. free quark. d. negative ion.