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Author Question: An emission nebula appears primarily ________ in color, due to ionized hydrogen. Fill in the ... (Read 41 times)

Chelseaamend

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on: Jul 27, 2018
An emission nebula appears primarily ________ in color, due to ionized hydrogen.
 
  Fill in the blank(s) with correct word

Question 2

In what manner have astronomers and physicists made tests to confirm that Einstein's theory of general relativity is actually a proper description of gravitational phenomena?
 
  What will be an ideal response?


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Sammyo

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

red

Answer to Question 2

A number of tests have confirmed Einstein's theory of general relativity. The first two, as mentioned in the text, are the deflection of starlight near the Sun during a total solar eclipse and the precision of the orbit of Mercury. In both cases, general relativity accurately predicted what was observed and could not be explained using classical physics. We have also observed gravitational redshift in the starlight given off by dense objects such as white dwarfs and neutron stars.


Chelseaamend

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Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

vickybb89

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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