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Author Question: Why is it so difficult to make a direct image of a planet around another star? What will be an ... (Read 43 times)

asan beg

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on: Jul 27, 2018
Why is it so difficult to make a direct image of a planet around another star?
 
  What will be an ideal response?

Question 2

Relate synchrotron radiation to the central engine of active galaxies.
 
  What will be an ideal response?


Ashley I

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

Compared to how far stars are from us, their planets orbits are very small. Further, planets only reflect light (or weakly emit infrared radiation) and are therefore much (billions) of times fainter than the star. It is very difficult to make an image of such a faint object so close to such a bright object.

Answer to Question 2

This non-stellar radiation is produced by electrons spiraling in very strong magnetic fields around the accretion disks of supermassive black holes. The magnetic fields cause the radiation to be strongly polarized, and unlike normal thermal radiation, the spectrum gives no clue to the temperature of the disk.


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