0
Venus or Mercury, depending in the type of "day" that you mean.
A "day" on Venus is -243.0185 Earth days long. The "minus" means it rotates in a direction opposite the Earth and all the other planets (except Uranus).
This "day " is the rotation period, called the "sidereal day".
However there's also the "solar day". That's roughly "sunrise to sunrise".
The solar day depends on a planet's orbital motion, as well as its rotation.
Venus has a solar day of about 116.5 Earth days.
For the solar day it's Mercury that has the longest day, because of
the direction of rotation of Venus. Mercury has a solar day of about 176 Earth days.
Comment: The "related link" given below isn't really related. It about the movie
called "The Longest Day".
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoVenus, where a day is equal to 243 Earth days.
A year on Venus is equal to 225 Earth days, so its day is longer than its year.
That's the "sidereal day". If you use the "solar day" as the definition of "day"
the answer is different. Then it's Mercury that has the longest day.
Wiki User
∙ 11y agoMercury. Mercury takes 88 Earth days to go around the Sun, so its year is 88 Earth days. It spins very slowly on its axis though, once every 58.6 Earth days relative to background stars. A solar (apparent) day on Mercury takes 176 Earth days, because of this slow spin relative to the time taken to orbit. The spin of Venus relative to the background stars is slower, taking 243 Earth days to spin once on its axis. But since its spin is retrograde (clockwise as viewed from above the north pole) and in the opposite direction of orbit around the Sun, the solar day is less at 116.75 Earth days.
Another viewpoint: That's right, but the time taken to spin once is also used as
a definition of "day". This is called the "sidereal day". On that definition Venus
has the longest day, as you can see from the above information. So the full answer is Mercury or Venus, depending on the definition of "day".
Add your answer:
Earn +20 pts
Which planet travels the longest in its revolution around the sun?
Neptune has the longest orbital period, which is equal to 59,800 Earth days. Pluto's is even longer (90,588 Earth days), but it has since been reclassified as a dwarf planet.
Which terrestrial planet has the longest year?
Pluto has the longest year, if it was still a planet that is, equal to 248.76 Earth years. Since Pluto is no longer considered a planet, the planet with the longest year is Neptune, at 164.8 Earth years per revolution around the Sun.
Which planet has the shortest period of revolution as measured relative to earths time?
The planet that has the shortest period of revolution is Mercury, which is 88 days. The planet with the longest revolution is Neptune, which is 165 years. Earth's revolution is the third shortest.
What planet has the longest revolution?
If you mean revolution on it axis (spin/day length) rather than orbital period, then the answer is the planet Mercury, where time between sunrises is roughly 176 Earth days.
The planet with the longest period of revolution is?
Neptune.
What a planet that has the longest days and nights?
Mercury. (It is NOT Venus).
Which planet travels the longest in its revolution around the sun?
Neptune has the longest orbital period, which is equal to 59,800 Earth days. Pluto's is even longer (90,588 Earth days), but it has since been reclassified as a dwarf planet.
What planet has days longer than earth years?
No planet in our solar system has days longer than one Earth year. Venus has the longest day -- it's 243 Earth days.
What planet requires one earth year to rotate on its axis?
There is no such planet known. The planet with the longest rotation period is Venus. That rotates in about 243 Earth days.
What is the number of days that the planet 's revolve around the sun?
You would have to find the planet with the longest year and that would be your answer because as you knoe Earths year is 365 (about) days and Mercurys is 88 days so....
Which terrestrial planet has the longest year?
Pluto has the longest year, if it was still a planet that is, equal to 248.76 Earth years. Since Pluto is no longer considered a planet, the planet with the longest year is Neptune, at 164.8 Earth years per revolution around the Sun.
What is the shortest year to longest 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)
What planet's days are longer than one earth year?
None. Venus has the longest rotation period of 243 days, less than a year.
What planet takes the most amount of time to orbit the sun?
As Pluto is no longer considered a planet, the planet with the longest orbital period is Neptune. The Neptunian year is approximately 60,190 Earth days.
One day on which planet equals 318 earth days?
There are no planets in our solar system with a rotational period of 318 days. The longest is Venus, with a rotational period of 243 days.
The planet with the largest rotation?
The planet with the largest (or longest) rotation period is Venus, at 243 Earth days (retrograde, meaning clockwise, instead of counterclockwise like the Earth).
I Shouldn't Be Alive how many days was the longest one?
So far, the longest period of time of survival was 76 days on the episode 76 Days Adrift. However, this incident occurred around 1982 and was picked up as an episode for the show in 2010 by Animal Planet.
