Here are the rotation periods of the planets in our solar system in hours:

Terrestrial Planets:

* Mercury: 59 days (1,416 hours)

* Venus: 243 days (5,832 hours) - Retrograde rotation (rotates in the opposite direction of its orbit)

* Earth: 23 hours 56 minutes (23.93 hours)

* Mars: 24 hours 37 minutes (24.62 hours)

Gas Giants:

* Jupiter: 9 hours 55 minutes (9.92 hours)

* Saturn: 10 hours 33 minutes (10.55 hours)

* Uranus: 17 hours 14 minutes (17.24 hours) - Axial tilt almost 90 degrees (rotates on its side)

* Neptune: 16 hours 6 minutes (16.11 hours)

Note: The rotation periods are based on the time it takes for a planet to complete one full rotation on its axis.