Multiple Choice
Earth has been sending out strong radio messages for about 115 years,so detection equipment on a hypothetical planet 115 light-years away might just now begin receiving them.What is the parallax angle subtended by a system at this distance? Can we detect such a parallax angle with our present technology?
A) 0.0027 arcseconds; no
B) 0.0087 arcseconds; yes
C) 0.028 arcseconds; yes
D) 115 arcseconds; yes
Correct Answer:
Verified
Correct Answer:
Verified
Q1: The numerical value given by the Drake
Q32: The first successful detection of signals from
Q39: It is unlikely that intelligent life would
Q41: In which very harsh environment has life
Q42: The primary constituents for the organic molecules
Q44: The Drake equation calculates the number of
Q45: Several lines of evidence now suggest that
Q46: Which idea has been borne out by
Q47: The so-called water hole is a range
Q48: The meteorite ALH 84001 was discovered in