18 only your weight changes
That would be speedy Mercury, named for the winged messenger of the Gods.
Venus, it's the next planet out from the sun after mercury.
try it and find out :L
Mercury
mercury
Mercury has the shortest year. It's year is about 88 Earth days.
If you are asking what planet has the least days in a full trip around the sun, it would be the planet Mercury, the moon has the least days in a trip with 29, however it is not counted as a planet.
A year for Mercury is 88 days. Earth's year is 365 days. The nine year old would have lived 3285 days on Earth. On Mercury, that would translate to 37.329 years for a nine year old earthling.
Mercury has the shortest year. One year on Mercury is 88 Earth days.
The planet closest to the sun is the planet Mercury. The planets in order from closest planet to the sun and out would be Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
Mercury is the planet with an 88-day year.
Neptune has the longest year( Pluto would be but it isn't a planet) Mercury has the shortest year(1 year=88 earth days)