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1) Mercury rotates very slowly. It takes Mercury about 58.6 Earth days to rotate just once. That's the length of the sidereal day.
2) Mercury has a solar day of about 176 Earth days in length. So, Mercury's solar day is much longer than its long sidereal day. That's because of the combination of slow rotation with a short orbital period (about 88 Earth days).
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoBecause Mercury rotates more slowly than Earth (and orbits the Sun more quickly).
Mercury takes a lot longer to spin all the way around than Earth does, meaning its solar day (noon to noon) is longer because it takes the Sun longer to move around the sky.
The solar day depends on a planet's orbital motion as well as a planet's spin.
These two things combine to give Mercury the longest solar day in the Solar System. It's about 176 times longer than Earth's solar day.
The effect of the orbital motion is very important in the case of Mercury. The
Mercury solar day is 3 times longer than Mercury's rotation time.
Wiki User
∙ 12y agoyes
Anonymous
Because Earth is quicker to rotate.
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How many planets in your Solar System is larger than mercury?
As Pluto is no longer classed as a planet (It is now known as a dwarf planet), Mercury is the smallest. so there are seven planets larger than mercury.
Is Venus's bigger than Mercury?
Mercury is the smallest planet in the Solar system.
Is mars day longer or shorter or longer than earths?
longer
Can Titan be bigger than Mars?
No. Titan's volume is 71,600,000,000 cubic km (0.066 Earths), while Pluto's volume is 6,390,000,000 cubic km or 0.0059 Earths. So Titan is quite a bit bigger by volume.
What are all the planets from big to small?
The planets in our solar system from biggest to smallest are Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, and Mercury. Pluto is no longer considered to be a planet in our solar system, but is smaller than Mercury.
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.
How many planets in your Solar System is larger than mercury?
As Pluto is no longer classed as a planet (It is now known as a dwarf planet), Mercury is the smallest. so there are seven planets larger than mercury.
Is Venus's bigger than Mercury?
Mercury is the smallest planet in the Solar system.
Do any planets have longer days or years?
No two planets in our solar system have the same length of day or length of year. Compared with Earth, these planets have longer years: Mars, Jupiter, Saturn, Uranus, Neptune. These have much longer days than Earth: Mercury and Venus. Mars has a day that's slightly longer than Earth's day. Depending on the particular definition of "day" that is used, two planets have a day that's longer than than that planet's year. They are Mercury (solar day) and Venus (sidereal day).
Is mars day longer or shorter or longer than earths?
longer
Can Titan be bigger than Mars?
No. Titan's volume is 71,600,000,000 cubic km (0.066 Earths), while Pluto's volume is 6,390,000,000 cubic km or 0.0059 Earths. So Titan is quite a bit bigger by volume.
What are the two smallest planets in your solar system?
Mercury and venus...pluto if you still count it. [Edit: this should read: Mercury and Mars... the latter being smaller than Venus]
How many earths would it take to equal the mass of mercury?
I dont think there can ANY earths that can be the mass of mecury. mercury is smaller than earth
How many earths would it take to equal the mass mercury?
I dont think there can ANY earths that can be the mass of mecury. Mercury is smaller than earth
What are all the planets from big to small?
The planets in our solar system from biggest to smallest are Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, and Mercury. Pluto is no longer considered to be a planet in our solar system, but is smaller than Mercury.
Eath has a longer year than mercury or Jupiter?
mercury
Is mercury smaller or big then earth?
Not even close to it. The sun is about 864938 miles in diameter, while Mercury is only about 3032 miles in diameter. Actually, Mercury is not much larger than Earths moon. If you mean Mercury as in the plant, then no. The sun is the biggest thing in are solar system.
