Multiple choice

A day on Mercury, that is, from one sunrise to the next, is equivalent of how many earth days?

  1. 365

  2. 206

  3. 276

  4. 176

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mercury has a very slow rotation and a fast orbit, leading to a solar day (sunrise to sunrise) that lasts about 176 Earth days. This is significantly longer than its sidereal rotation period of approximately 59 Earth days.