Which planet has the longest day and night?

Answer 1

The known planets in the solar system, in order of their average distance

from the sun, from nearest to farthest, are . . .

-- Mercury

-- Venus

-- Earth

-- Mars

-- Jupiter

-- Saturn

-- Uranus

-- Neptune

-- Pluto**

** Pluto has been redefined as a "dwarf planet".

Answer 2

The "outer planets" refers to the four farthest planets from the Sun (the four largest planets, all gas giants) : Jupiter, Saturn, Uranus and Neptune. Pluto, once considered the ninth planet, is currently classed as a dwarf planet.

Memory Aid

The mnemonic "My Very Excited Mother Just Served Us Nachos" can provide the names and order for all of the planets : "Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune".

Jupiter, Saturn, Uranus, Neptune.

Answer 3

It depends on how you define "day". A "solar day" is roughly from sunrise to the following sunrise, or more exactly noon to noon. A "sidereal day" is one complete rotation of a planet relative to the background stars. The orbit of the planet around the Sun affects how the sidereal day is related to the length of the solar day.

Mercury has a solar day longer than its year.

Venus has a sidereal day longer than its year.

Mercury takes 88 Earth days to go around the Sun. But it spins very slowly on its axis, once every 58.6 Earth days relative to background stars. Because it is turning as it orbits, the solar day (sunrise to sunrise) on Mercury takes 176 Earth days, which is twice the length of its year.

Venus takes 243 Earth days to spin on its axis relative to the background stars (its "sidereal day"). It takes 224.7 Earth days to orbit the Sun. Its rotation, moreover, is clockwise, unlike the Earth and most other planets. Because of this reverse rotation, and its slowness compared with the orbital period, a "solar day" is only 116.75 Earth days.

(see the related link below)

Answer 4

In elipses. The Sun is at one of the focal points of the elipse.

In elipses. The Sun is at one of the focal points of the elipse.

In elipses. The Sun is at one of the focal points of the elipse.

In elipses. The Sun is at one of the focal points of the elipse.

Answer 5

Everywhere on earth at some point of the year has longer night time than daylight time between the Autumnal Equinox and Vernal Equinox. (Equinox literally means equal night). The further you are from the equator the greater the difference between day and night

For 2010 / 2011

In the northern hemisphere this is between September 22nd, 2010 and March 20th, 2011. In the Southern Hemisphere this is between March 20th, 2010 and September 22nd, 2010.

Answer 6

The planet with the longest day and night is Mercury. The time between sunrises is roughly 176 Earth days.

It is NOT Venus. The time between sunrises on Venus is roughly 117 Earth days

(the solar day) and not 243 Earth days (the sidereal day)

Answer 7

The order, from shortest day to longest day is: Jupiter, Saturn, Neptune, Uranus, Earth, Mars, Mercury, Venus.

That's for the rotation periods, called "sidereal days".

The order of Mercury and Venus are reversed if you mean the "solar day".

Answer 8

The line between light and dark is constantly moving - or, to be more accurate, the line is perfectly stationary while the Earth spins beneath it.

The sunrise/sunset line between day and night is called the "terminator".

Answer 9

Generally, the outer planets are called Gas Giants, however, Uranus and Neptune are now referred to as Ice Giants.

Answer 10

In elipses. The Sun is at one of the focal points of the elipse.