Download How Old Are You

Objective – Using references, I can calculate my age on other planets.
Name ______________________________________________________________
How Old Are You?
Background
Your birthday is actually a celebration of a trip made by Earth around the Sun one
time. For each trip around our star we “age” one year ... or at least that is how we
humans express it. How “old” are you on the other seven planets in our Solar System?
Procedure
1. Figure your age in Earth days [your age x 365].
_____________ x 365 = _____________ days
your age (years)
2. For the rocky planets, divide your age in Earth days by the number of Earth days in
a planet's year. The answer is your “new” age.
Example for Mercury – for a person 20 years old on Earth…
 20 x 365 = 7300 Earth days old
 7300/88 (Earth days in Mercury's year) = 83
 The 20 Earth-year-old person would be 83 years old on Mercury!
3. For the gas giants, find the number of Earth days in each planet's year. Then divide
your age in days by the number of Earth days in that planet's year. The answer is your
“new” age.
Example for Jupiter - for a person 20 years old on Earth:
 20 x 365 = 7300 Earth days old
 12 Earth years x 365 Earth days/year = 4380 Earth days in one Jupiter
year.
 7300/4380 = 1.7
 The 20 Earth-year-old person would be 1.7 years old on Jupiter!
~1~
Objective – Using references, I can calculate my age on other planets.
Table I – Rocky Planets
Planet
Your Age in
Divided by
Age on
Days
Planet Days
Planet
Mercury
88
“years”
Venus
225
“years”
Mars
687
“years”
Table II – Gas Giants
Planet
Your Age in
Divided by
Age on
Days
Planet Days
Planet
Jupiter
4,380
“years”
Saturn
10,770
“years”
Uranus
30,660
“years”
Neptune
60,225
“years”
~2~