« 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 10 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?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Did you know?

In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

Did you know?

On average, the stomach produces 2 L of hydrochloric acid per day.

Did you know?

Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

The asymmetrical appearance of Mira, an oscillating variable star. The asymmetrical appearance of Mira, an oscillating variable star.
Mosquito Eyes Up Close: Electron Microscope Image Creates Stunning View Of Insect Mosquito Eyes Up Close: Electron Microscope Image Creates Stunning View Of Insect
Image was downloaded from the Jet Propulsion Laboratory web site Image was downloaded from the Jet Propulsion Laboratory web site
The digital image of a fetus shows a well-developed head and a comparatively smaller body. At 7 ... The digital image of a fetus shows a well-developed head and a comparatively smaller body. At 7 ...
Image Image
In another solar system, a planet has an airless moon Zygo that is 4.0 × 105 m in diameter. ... In another solar system, a planet has an airless moon Zygo that is 4.0 × 105 m in diameter. ...
Video: Metabolic Rate, Heat and Thermoregulation - response to heat and cold stresses

For a complete list of videos, visit our video library