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Author Question: The units of proper motion are km/s because proper motion is the motion of stars across the sky. ... (Read 52 times)

viki

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on: Jul 27, 2018
The units of proper motion are km/s because proper motion is the motion of stars across the sky.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

A star has crossed the birth line and thus that star is now called a ________________.
 
  a. main-sequence star b. protostar
  c. YSO d. ZAMS


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meryzewe

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Reply #1 on: Jul 27, 2018
Answer to Question 1

False
RATIONALE: Units are not linear but angular so, for example, units of proper motion could be arc seconds/yr.

Answer to Question 2

c


viki

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


meryzewe

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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