Question

Which major planet has the largest . . . A. semimajor axis? B. average orbital speed around the Sun? C. orbital period around the Sun? D. eccentricity?

Answer 1

Mercury, Neptune, and Jupiter

Explanation:

• Mercury has the largest semimajor axis that is 5.791 x 107 in km.
• Mercury is the planet with the fastest speed, which has an average orbital speed around the sun for about 47.87 km/s.
• Neptune has the longest orbital speed around the sun of any planet in the Solar System which is equivalent to 164.8 years (or 60,182 Earth days)
• Jupiter has the largest eccentricity.

Hence, the answer is Mercury, Neptune, and Jupiter respectively.