Extrasolar planets with very small orbital periods (eg. 4 days) a. ) have been found in surprisingly large numbers b. )

[answerhappygod]

Extrasolar planets with very small orbital periods (eg. 4
days)
a. ) have been found in surprisingly large numbers
b. ) cannot exist: they would burn up
c. ) cannot be detected with current methods
d. ) would be likely to host life
The final factor in the Drake Equation depends on the lifetime
of an extraterrestrial intelligent civilization with which we might
communicate. If this factor is SMALL then:
a. ) Any kind of life, even primitive, is unlikely.
b. ) Extraterrestrials are among us.
c. ) Our probability of contacting extraterrestrials is large,
because their technology is advanced
d. ) Contact with extraterrestrials is unlikely because they
would have destroyed themselves.
Very roughly, how far is it across our galaxy, from one side to
the other?
a. ) 100,000 light years.
b. ) 1 light year
c. ) 100,000 Astronomical Units
d. ) 1000 light years