« previous next »

Author Question: What is SETI? How is it being done? What will be an ideal response? ... (Read 50 times)

mspears3

  • Hero Member
  • *****
  • Posts: 586
on: Jul 27, 2018
What is SETI? How is it being done?
 
  What will be an ideal response?

Question 2

Contrast space flight and radio communication as possible means of SETI.
 
  What will be an ideal response?

Question 3

How would the radio Earth appear to extraterrestrials?
 
  What will be an ideal response?


manuelcastillo

  • Sr. Member
  • ****
  • Posts: 304
Reply #1 on: Jul 27, 2018
Answer to Question 1

The Search for ExtraTerrestrial Intelligence is a systematic project listening to radio waves worldwide, by many teams and individuals, in the hope of detecting the first proof that an intelligent civilization beyond our solar system is broadcasting signals, either to contact us, or from random broadcasts, much as we are now sending our radio signals all over the Galaxy.

Answer to Question 2

With current technology, space flight to the closest stars would still take thousands of years. Radio waves travel at the speed of light, and we have been broadcasting our location with commercial radio stations since the late 1930s. Everyone interested in such contact within 70 light-years has been able to receive our signals by now.

Answer to Question 3

Earth would be a stronger source of FM and TV waves than even our Sun. The peak signals would happen when eastern North America was rising or setting for the observer, and the entire pattern would repeat as the Earth rotated.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

The cellular response of skeletal muscle cells to epinephrine The cellular response of skeletal muscle cells to epinephrine
Frequency distribution curve: interpatient variability in drug response Frequency distribution curve: interpatient variability in drug response
Locations and Response Characteristics of Photoreceptors Locations and Response Characteristics of Photoreceptors
Frequency distribution curve: interpatient variability in drug response. Frequency distribution curve: interpatient variability in drug response.
The CHRIS manual entry for toluene. Useful information includes response information, chemical and ... The CHRIS manual entry for toluene. Useful information includes response information, chemical and ...
For the circuit in Figure 1, assume ideal diodes. The peak inverse voltage is approximately For the circuit in Figure 1, assume ideal diodes. The peak inverse voltage is approximately
Video: Stroke volume - contractility definition

For a complete list of videos, visit our video library