Multiple Choice
Earth has been sending out radio messages for about 120 years, so detection equipment on a hypothetical planet 120 light-years away might just now begin receiving them. What is the parallax angle subtended by a system at this distance? Can astronomers detect such a parallax angle with existing technology?
A) 0.0026 arcseconds; no
B) 0.0084 arcseconds; yes
C) 0.027 arcseconds; yes
D) 120 arcseconds; yes
Correct Answer:
Verified
Correct Answer:
Verified
Q40: The basic chemical molecules thought to have
Q41: Why is it highly likely that life,
Q42: The earliest searches for radio signals from
Q43: Which of these events of the past
Q44: Why is liquid water believed to be
Q46: Does a planet's location within the Milky
Q47: In what way does the Drake equation
Q48: The classical laboratory experiments performed by Urey
Q49: The so-called water hole, a region of
Q50: Modern laboratory experiments that repeated those of