That depends on which solar system and planet you are asking about - we now know for planets orbiting other stars.
Earth, along with the other seven planets in our solar system, formed around 4.6 billion years ago. Exoplanets, the planets orbiting other stars, would have formed at varying times in the past.
Mars has been in space for as long as any other planet, such as, earth.
Mars is related to the other Inner Planets in the sense that it is formed of the rocky materials characteristic of the planets within the asteroid belt, ie; the Inner Planets. However, it has no known history in common with other planets short of several billion years ago, with the exception of meteorites thrown into space by asteroid collisions.
Scientists believe that the Earth and other planets in our solar system formed about 4.6 billion years ago from a disk of dust and gas surrounding the young sun. This process, known as accretion, involved the gradual gathering of particles to form the planets.
Uranuses year is 84.3 Earth years
The planets in our Solar System have existed pretty much as long as the Solar System - about 4.6 billion years. Planets in other, older, solar systems may have existed quite a bit longer - almost as long as the Universe (which is 13.8 billion years old).
From 1 to 54.72 billion years
Voyager took 9 years using a favourable positioning of other planets on the way there.
Saturn orbits the Sun like the other planets, it does not orbit anything else. One orbit for Saturn takes 29.4571 Earth years.
This is how long it takes the first 5 planets to orbit the Sun. Mercury: 0.2 years Venus:0.6 years Earth: 1 year Mars: 2 years
It is estimated that the Solar System is 4.6 billion years old including Earth and the other planets.
noones quite sure yet about if there is life on other planets because there is just no scientific proof of that yet. It would take to long to trave to other planets outside of our solar system because they can be light years away. However when we develope a way to reach the speed of light im sure we'll find out
the sun is bigger than any other planets because millions of years ago meteorites smashed together to make the sun and to any other planets that did not happen
Our nine planets orbit around the Sun. Other planets that are light-years away orbit around their suns (A sun is just a large star with planets). Hope this helped!
Neptune, the farthest planet from the Sun, takes the longest to complete one revolution around it, requiring about 165 Earth years. Among the dwarf planets, Pluto takes about 248 Earth years to orbit the Sun. Other dwarf planets like Eris and Haumea also have long orbital periods, with Eris taking approximately 558 Earth years to complete one revolution.
because it is the fastest way to measure in very long distances for example earth to other far away planets