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That depends on what you're asking. If it has no rotation, as in, it faces a fixed point in space, the day and night would each be half the length of its orbital period, or year. For the Earth, that would be 6 months.

However, that is pretty much impossible. What normally happens is that for various reasons, planetary rotation slows until one face remains tidally locked toward the star. In that case, one side has perpetual day, the other perpetual night.

There's also a 3:2 resonance where the planet appears to rotate backward, like Venus.

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What is true about Pluto -Pluto orbits is the third longest- Pluto is considered a terrestrial planet- Pluto does not rotate around its axis or Pluto has a tilted orbit?

Pluto has a tilted orbit (compared with the average plane of the orbits of the other planets). Also, Pluto would be considered a "terrestrial planet", but it is not now defined as a planet. It's just called a "dwarf planet" now.


If planet y orbits the Sun but does not rotate on its axis at all how long would a day be on planet y?

If you mean a locked orbit like some "hot Jupiter" exoplanets, then the answer is; one side of the planet will haveendless daylight and the other side a never ending night. In other words its "solar day" would last "for ever". Comment: that's not what the question says. It's about having no rotation at all. In that (unlikely) case the "sidereal day" would be, technically, infinite. The "solar day" would equal the length of the planet's year.


Which planet does not rotate on a top to bottom axis?

Venus is the planet that does not rotate on a top to bottom axis like the other planets in our solar system. It rotates in the opposite direction, from east to west, which is known as retrograde rotation.


Are there any planets that do not spin?

Yes. The moon rotates in relation to the stars, so it has an axis of rotation.


What is a planets axis?

A planet's axis is an imaginary line that runs through its center, connecting the North and South Poles. The tilt of this axis is responsible for the changing seasons on the planet as it orbits the sun.

Related Questions

Which planet rotate on in axis?

All the planets rotate on their axes and it would be a very unusual thing to find a planet that did not rotate.


What is different about how the planets rotate on there axis?

Unlike their orbits around the sun - which was inherent in the way the planets were formed - their rotation speeds and axis of rotation is random and is dependent on each planet's history of collisions.


Does mercury orbit or rotate?

It does both. It orbits the sun and rotates on its axis.


Does planet mercury rotate about its own axis?

Yes, Mercury does rotate about its own axis. However, its rotation is unique in that it is in a 3:2 spin-orbit resonance, meaning it rotates on its axis three times for every two orbits around the Sun.


Which one goess around an axis which one goes around an orbits?

"Rotate" on an axis. "Revolve" in an orbit.


Does Every planet rotate on its axis?

Yer m8


What planets have bodies that rotate on an axis?

The planet Earth is the only planet with rotisseries.


What planet orbits on a side axis as it travels around the?

Uranus


Does every planet rotate on its own axis?

Yes from the wickipedia .


Which planet takes most time to rotate on its axis?

Venus


What is the meant when a planet rotates?

When a planet spins on its axis it is said to rotate. (Think of a top.)


What is true about Pluto -Pluto orbits is the third longest- Pluto is considered a terrestrial planet- Pluto does not rotate around its axis or Pluto has a tilted orbit?

Pluto has a tilted orbit (compared with the average plane of the orbits of the other planets). Also, Pluto would be considered a "terrestrial planet", but it is not now defined as a planet. It's just called a "dwarf planet" now.