According to solar nebula theory, what is the first step in planetesimal formation?
a. heating
b. flattening
c. accretion
d. condensation
e. gravitational collapse
d
Physics & Space Science
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________ dwarfs are M dwarfs on the main sequence whereas _________ dwarfs are hot, dim, and not on the main sequence
Fill in the blank(s) with correct word
Physics & Space Science
The planet whose orbit lies nearest to the Sun is
a) Mercury. b) Venus. c) Pluto. d) Mars.
Physics & Space Science
Electric charge is quantized
Indicate whether the statement is true or false
Physics & Space Science
The Sun's blackbody curve peaks in the ________ portion of the spectrum
A) radio B) visible C) ultraviolet D) X-ray E) infrared
Physics & Space Science