The Sun's magnetic field is evident in the looped shapes of
a. solar flares.
b. sunspots.
c. the corona.
d. granules.
e. prominences.
Question 2
A comet in a highly elliptical orbit is found to have a semimajor axis equal to one astronomical unit (AU). According to Kepler's 3rd law, what would be the sidereal period of this comet?
a. more than one year
b. one year
c. less than one year
d. 76 years; the same for every comet
e. Not enough information is given to determine this.