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Author Question: Which one of the methods below enables astronomers to measure the distance of a star near the Sun in ... (Read 71 times)

sdfghj

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on: Jul 27, 2018
Which one of the methods below enables astronomers to measure the distance of a star near the Sun in our galaxy?
 
  a. sound echoes knowing the speed of sound and time
  b. parallax using Earth's orbit
  c. human binocular vision
  d. Balmer series
  e. none of the above

Question 2

The ___________ of a black hole is the radius from a black hole at which the escape velocity is approximately equal to the speed of light.
 
  a. Roche limit
  b. Lagrangian point
  c. Chandraskhar limit
  d. Hubble radius
  e. event horizon


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smrtceo

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

b

Answer to Question 2

e


sdfghj

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Reply 2 on: Jul 27, 2018
Excellent

Joy Chen

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Reply 3 on: Yesterday
:D TYSM

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