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Author Question: Why do we need new forms of technology to make it possible to journey to the nearest stars within a ... (Read 61 times)

naturalchemist

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on: Jul 27, 2018
Why do we need new forms of technology to make it possible to journey to the nearest stars within a human lifetime?
 
  What will be an ideal response?

Question 2

It is impossible for a star to have a negative apparent magnitude, such as -1.
 
  Indicate whether the statement is true or false


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lkoler

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

Present rockets operate through chemical reactions, i.e., ordinary burning, which is a relatively inefficient process. To achieve high speeds requires lots of additional fuel, but the added weight of the fuel makes it more difficult to increase the rocket's speed. Such chemical rockets therefore have a fundamental limit to their speed and can go no faster than about 0.1 percent of the speed of light, which is not enough to reach the nearest stars (more than a light year away) in less than 1000 years.

Answer to Question 2

FALSE


naturalchemist

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Reply 2 on: Jul 27, 2018
Excellent

helenmarkerine

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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