An orbit with a large semimajor axis will have the longest period according to Kepler's third law. This means that an orbit with the greatest average distance from the central body will have the longest period.
Kepler's first law says Neptune has an elliptical orbit with the Sun at one focus. The same goes for the other planets.
Uranus, Neptune, and Pluto (which has been reclassified as a dwarf planet but its orbit remains the same). There is speculation of a tenth planet beyond the orbit of Pluto, and if it exists it would also take more time than Saturn to orbit the sun.
I;m not completely sure but Neptune would make the most sense because its a cold planet and it has the largest orbital path. If Pluto was still considered a planet then my answer would be Pluto.
Neptune would finish last, because it has the longest orbit and the slowest velocity.
Saturn's orbital period is about 29 and a half Earthyears. Meaning it takes about29.5 Earth years forSaturnto orbit the Sun once. Twice would make it about 59 years.
Kepler's first law says Neptune has an elliptical orbit with the Sun at one focus. The same goes for the other planets.
pluto
Uranus, Neptune, and Pluto (which has been reclassified as a dwarf planet but its orbit remains the same). There is speculation of a tenth planet beyond the orbit of Pluto, and if it exists it would also take more time than Saturn to orbit the sun.
Revolution of a planet can mean two things:* orbital period - the time it takes to orbit the Sun - then the answer is Neptune, the farthest planet. Neptune takes about 165 years to orbit the sun once. It is thus the planet in our solar system with the longest period of revolution. The dwarf planet Sedna may take as long as 12,000 years to orbit the sun.* rotational period - the time it takes to spin on the axis - then the answer is Venus. Venus has the longest period of rotation (day) at 243 Earth days.Eris, which is larger than Pluto, orbits once every 557 years.
One of the parts of an ellipse is the length of its major axis. Half that is called the semimajor axis. Kepler's 3rd law says that the time to do one orbit is proportional to the 3/2 power of the semimajor axis. IF the semimajor axis is one astronomical unit the period is one year (the Earth). For a planet with a semimajor axis of 4 AUs the period would have to be 8 years, by Kepler-3.
The Paleozoic
The period of Earth's time that would be considered longest is the Precambrian Era.
I;m not completely sure but Neptune would make the most sense because its a cold planet and it has the largest orbital path. If Pluto was still considered a planet then my answer would be Pluto.
This depends on whether you count Pluto as a planet or not. If you don't, then Neptune has the longest orbit period (nearly 165 Earth years). If you do, then Pluto has a orbit period of 248.1 years. If you count Pluto, you might also count Sedna which takes 12,050 years. Sedna is 2/3 the size of Pluto and it's 960 times as far from the Sun as the Earth.
Among the two Jurassic period was the longest one.The existence of the period was for about 50 million years whereas permian existed for 35 million years. The duration of Mesozoic era /secondary was 120 million years .
Neptune is the gas giant furthest from the Sun and Kepler's third law tells us that the period of revolution of a planet around the sun increases as distance from the Sun increases. It does not matter if the planet is a gas giant or not. The law says period depends on distance and not mass.It takes 60,190 days for Neptune to orbit the Sun which is about165 Earth years. For that matter, one Neptune Year is 89,666 Neptune days.If Pluto was still a planet, it would get the record for the longest year since it is, on the average, further than the other planets.Pluto has an orbital period of 248 earth years. Since Pluto was discovered in 1930, it has only completed about 1/3 of a revolution.Neptune
Neptune would finish last, because it has the longest orbit and the slowest velocity.