« previous next »

Author Question: Why is it so difficult to make a direct image of a planet around another star? What will be an ... (Read 42 times)

asan beg

  • Hero Member
  • *****
  • Posts: 570
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

  • Sr. Member
  • ****
  • Posts: 344
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.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Three Sushi Does Not Make an EggRoll Three Sushi Does Not Make an EggRoll
image image
This image captures a protest of people who want the privilege of “naming” themselves. This image captures a protest of people who want the privilege of “naming” themselves.
Direct thumb pressure along the tibialis anterior. Start at proximal end, moving about 1 inch at a ... Direct thumb pressure along the tibialis anterior. Start at proximal end, moving about 1 inch at a ...
Heart - All I Wanna Do Is Make Love To You (Official Music Video) Heart - All I Wanna Do Is Make Love To You (Official Music Video)
calculate the quantities required to make 5 lb of hydrophilic ointment: calculate the quantities required to make 5 lb of hydrophilic ointment:
Video: Exocytosis - secretion

For a complete list of videos, visit our video library