When some one invented them.
As long as the solar system has been around.
The period of a planet is the time it takes for the planet to complete one orbit around its parent star. This period is typically measured in Earth days or years, depending on the length of the planet's orbit.
Since the beginning of astronomy. Astronomers are ALWAYS looking for new things.
For a planet in our solar system, one revolution around the Sun is called a "year." Each planet has a different year. As you know, Earth takes 365.25 days to follow its orbit around the Sun, though Jupiter's year is about 4335 earth days. It all depends on how long it takes each one to revolve around the Sun.
a year is determined on how long the planet takes to orbit the sun. When calculating the year of a planet we use earth days. __________________ Yes, distance counts. The farther a planet is from the sun, the longer it takes that planet to complete one full orbit.
it is a fish that has been around since the planet earth has existed.
Since the planet was made.
Modern humans have been around for 200,000 years.
mars has been a planet for about 4.6 million years.
The Spanish Mustangs have been around (in the Americas) for over 500 years. Stallions, on the other hand, far longer than that: stallions have been around ever since horses or Equids have existed on Planet Earth.
how long has deforestation been around
As long as guns have been around.
Because she been on the planet for a long time
5000 years
A year.
2 years
how long has the london eye been around for