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Mercury has the longest "solar "or apparent day. 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 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 apparent solar day is less, at 116.75 days.
So, Mercury has the longest "Solar day". However Venus has the longest "sidereal day", because that's defined as the rotation period.
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoVenus or Mercury, depending on the definition of "day" which is used.
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Which outer planet has the longest day?
That is Uranus.
Which planet has the longest cycle of day and night?
The planet is Mercury. (Some people think it is Venus, but it is Mercury.)
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 is the name of the planet with the longest day compared to an earth day?
Venus. The length of "day" is 243 Earth days. That's the rotation period which is called a "sidereal day". However, there's also a "day" called the "solar day". That's the time for the Sun to complete one apparent journey around the sky. For that definition of "day", it is Mercury that has the longest day at about 176 Earth days.
Which outer planet has the longest day?
That is Uranus.
Which planet has the longest cycle of day and night?
The planet is Mercury. (Some people think it is Venus, but it is Mercury.)
Which planet has the longest cycle of day and night of the terrestrial planets?
Mercury. It has the longest cycle of ALL the planets, not just terrestrial.
What planet has the second shortest day?
Mercury has the 2nd longest "sidereal day" with a sidereal rotation period of 58.646 Earth days. The longest "sidereal day" day is Venus, with a sidereal rotation period of 243.018 Earth daysIf you use the "solar day" as your definition of "day", the order is reversed. Mercury then has the longest day and Venus has the second longest day.
Which planet is longest planet?
Jupiter is the largest with the largest diameter.
Is the Danube river the longest in the world?
No - the longest river on the planet is the Amazon.
Which planet take the longest time to make 1 revolution around the sun?
Technically, since Pluto is no longer a planet, but a dwarf planet, Uranus is the planet that takes the longest to orbit the sun.
Which planet has the longest daylight?
Uranus
Which planet has the longest rotation?
Venus
What planet with the longest rotation?
venus
Which planet have the longest rotation?
If you count Pluto as a planet its Pluto :D
What planet would you sleep the longest?
Earth.Thats the only planet with oxygen :)
