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Venus, its day is equivalent to 243 Earth Days. That's the rotation period, or "sidereal day". However the "solar day" on Venus is only about 117 Earth days. If you mean the "solar day" then Mercury has the longest day because
Mercury has a solar day of about 176 Earth days.
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoMercury. Mercury takes 88 days to go around the sun, so its year is 88 solar days. It spins very slowly on its axis though, once every 58.6 days relative to background stars. A solar (apparent) day on Mercury takes 176 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 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 apparent solar day is less, 116.75 days.
Wiki User
∙ 10y agoVenus, has the longest rotation period. That's called its "sidereal day".
However, Mercury has the longest "solar day". A solar day on Earth is exactly 24 hours and Earth's sidereal day is about 23 hours and 56 minutes.
Wiki User
∙ 11y agoAn Earth Day is 24 hours no matter what planet you are on. If you mean the planet which has the longest day then it's Venus or Mercury.
Venus has the longest period of rotation. That's called the "sidereal day".
Venus has a sidereal day of -243.0185 Earth days. The "minus" means it rotates in a direction opposite to the Earth and all the other planets, except Uranus.
The other important definition of "day" is the "solar day". This depends on a planet's orbital motion as well as its axial spin. On that definition the answer is Mercury.
Wiki User
∙ 11y agoThe planet that has the longest day is either Venus or Mercury, depending on the definition of "DAY" which is used.
Wiki User
∙ 11y agoIt's Mercury or Venus, depending on which definition of "day" is used.
Wiki User
∙ 11y agoMercury or Venus , depending on which definition of "day" you use.
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Murcery
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Has anyone ever touched any planet in your solar system?
Yes, Billions of people do each day. The Earth is a planet :-)
How many hours is a day on Jupiter?
Jupiter is the fifth planet from the Sun and the largest planet in the Solar System. There are only 9 hours and 56 minutes for a day on Jupiter.
Which outer planet has the longest day?
That is Uranus.
What planet has no day or night?
I think they all do in this solar system, but maybe someplace with two suns has a planet without night. On a binary star system when the planet move between the stars in part of it's year there will be no night or only daylight.
What planets days are longer than your year?
Venus "sidereal day" is longer than its year. Mercury's "solar day" is longer than its year. However, there is no planet in our solar system with a day longer than our year on Earth.
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 is the biggest planet?
Jupiter is the biggest in our Solar System. Outside, the object is changing almost every day.
Is a day on Jupiter longer on another planet or shorter?
Jupiter has the shortest "day" of any planet in the solar system.
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.
Which planet's day is closest to that of an earth day?
A "sol", or solar day on Mars, is only about 40 minutes longer than a solar day on Earth. This is by far the closest to being the same as Earth's of any planet in the solar system.
What day was Pluto ruled out as planet from the list of planet in the solar system?
August 24th 2006. It was a Thursday.
What planet is the highest temperature is our solar system?
Planet with an atmosphere, Venus. Planet without an atmosphere, Mercury (on the day side).
Do the other planets in the solar system have day and night?
Yes. Since all planets in the solar system spin on an axis, every planet has cycles of day and night.
Has anyone ever touched any planet in your solar system?
Yes, Billions of people do each day. The Earth is a planet :-)
Which planet has a 7 hr day?
In our solar system, no planet spins that fast - the planet with the shortest day (or rotational period) would be Jupiter - but it is just under 10 hours.
What planet is the most cold?
The coldest planet used to be Pluto, but now that Pluto's not a planet anymore, the coldest planet is Neptune. Its cloud tops are at a freezing -218 degrees Celsius. That pretty cold, but it's recorded that one of Neptune's moons, Triton, has a record-breaking temperature of -235 degrees Celsius. Also, isn't this weird? You know that Mercury rotates slowly, right? Well, at night it rotates so slow that its temperatures reach -183 degrees Celsius, although Mercury is the closest planet to the sun in the solar system. Not nearly as cold as Neptune, but colder than it would ever be here on Earth! Anyways, if Pluto was still a planet, it would be the coldest, but not anymore. Now it's Neptune. Hope this helps!
Which is longer the stellar day the sidereal day or the solar day?
Usually the solar day is the longest. The other two are very similar in length to each other. For example, the solar day on Earth is about 4 minutes longer than the other two "days". However, for the planet Venus the solar day is the shortest. That's because Venus has retrograde rotation.
