To date, we've found few planets orbiting their stars at distances comparable to the distances of the jovian planets in our solar system. Why do astronomers think this is the case?

A) We have not yet been searching for planets at such distances for a long enough time.
B) Planets at such distances are extremely rare.
C) No known method can detect planets at such large distances.
D) Planets at such distances are probably low in mass.


A) We have not yet been searching for planets at such distances for a long enough time.

Physics & Space Science

You might also like to view...

Explain Mercury's peculiar rotation and revolution. How is it different than most other planets?

What will be an ideal response?

Physics & Space Science

Banked Curves: What is the proper banking angle for an Olympic bobsled to negotiate a 100-m radius turn at 35 m/s without skidding?

A. 31° B. 41° C. 51° D. 61°

Physics & Space Science

Starting with a sample of pure parent radionuclide, what would be the ratio of the parent radionuclide to its daughter after two half-lives have elapsed?

a. 1 to 1 b. 1 to 2 c. 1 to 3 d. 1 to 4

Physics & Space Science

The H-R diagram main-sequence of stars has a limit at the lower-mass or energy-output end because

a. low-mass stars form from the interstellar medium very rarely. b. low-mass objects are composed primarily of solids, not gases. c. pressure does not depend on temperature in degenerate matter. d. the lower limit represents when the radius of the star would be zero. e. there is a minimum temperature for hydrogen nuclear fusion (the definition of a star).

Physics & Space Science