Basically the solar day is the siderealday (rotation period of the planet) times one plus orminus (sign depending on the rotational direction of theplanet relative to its revolution) the inverse of the numberof days in the year..
Simply so, what determines a planet's day length?
Day Length On Earth, a solar day is around 24 hours.Another way to measure a day is to count the amount of timeit takes for a planet to completely spin around and make onefull rotation. This is called a sidereal day. On Earth, asidereal day is almost exactly 23 hours and 56minutes.
One may also ask, how is a day determined? A day is approximately the period of time duringwhich the Earth completes one rotation around its axis. A solarday is the length of time which elapses between the Sunreaching its highest point in the sky two consecutivetimes.
Simply so, what determines the size of a planet?
If you know how far away a planet is from you,you can determine its linear diameter D. The diameter of aplanet D = 2p × (distance to the planet)× (the planet's angular size indegrees)/360°, where the symbol p is a number approximatelyequal to 3.14 (your calculator may say 3.141592653).
How long are days on different planets?
Option 2: A Table
| Planet | Day Length |
| Venus | 5,832 hours |
| Earth | 24 hours |
| Mars | 25 hours |
| Jupiter | 10 hours |
Related Question Answers
How long is a day actually?
If our definition of a day was truly based on onecomplete rotation of the Earth on its axis — a 360 degreespin — then a day would be 23 hours, 56 minutes, and 4seconds. This is nearly 4 minutes shorter than our 24-hour standardday.What is responsible for the length of one year?
More careful observations led to the geocentric model,in which the sun takes just over 365 days to move around the Earthonce relative to the background stars. The length of theyear was known to be about 365.25 days since the times ofthe ancient Egyptians.Which planet has the shortest day?
The planet Jupiter has the shortest day ofall the eight major planets in the Solar System. It spinsaround on its axis once every 9 hr 55 min 29.69 sec. Jupiterhas a small axial tilt of only 3.13 degrees, meaning ithas little seasonal variation during its 11.86-year-longorbit of the Sun.Which planet has the shortest year?
Pluto; a year on Pluto takes 248.5 Earth years.The Planet with the Shortest Year: Mercury; ayear on Mercury takes only 88 Earth days.Which planet spins the fastest?
Jupiter is the fastest spinning planet in ourSolar System rotating on average once in just under 10hours. That is very fast especially considering how largeJupiter is. This means that Jupiter has the shortestdays of all the planets in the Solar System.How many hours does Saturn have in a day?
A planet's day is the time it takes the planet torotate or spin once on its axis. Saturn rotates faster thanEarth so a day on Saturn is shorter than a dayon Earth. A day on Saturn is 10.656 hours longwhile a day on Earth is 23.934 hourslong.Which planet has longest day?
So, Venus has the longest day of any planet inour solar system. It completes one rotation every 243 Earth days.Its day lasts longer than its orbit. It orbits the Sun every224.65 Earth days, so a day is nearly 20 Earth days longer than itsyear.How long is a day on Pluto?
Pluto rotates much more slowly than Earth so aday on Pluto is much longer than a day onEarth. A day on Pluto is 6.4 Earth days or 153.3 hourslong.What are Kepler's 3 laws?
Kepler's three laws of planetary motion can bestated as follows: (1) All planets move about the Sun in ellipticalorbits, having the Sun as one of the foci. (2) A radius vectorjoining any planet to the Sun sweeps out equal areas in equallengths of time.How can you tell if a planet has an atmosphere?
The thickness of a planet's atmosphere depends onthe planet's gravity and the temperature of theatmosphere. A planet with weaker gravity does nothave as strong a hold on the molecules that make up itsatmosphere as a planet with stronger gravity. The gasmolecules will be more likely to escape the planet'sgravity.Which has no atmosphere at all?
Mercury's lack of atmosphere means that it is notthe hottest planet; Venus, with its runaway global warming,has that honor. The temperature of Mercury varies from dayto night, but the planet only changes slight during itsseasons.How does a planet's size affect its orbit?
A planet's orbital speed changes, depending onhow far it is from the Sun. The closer a planet is to theSun, the stronger the Sun's gravitational pull on it, and thefaster the planet moves. The farther it is from the Sun, theweaker the Sun's gravitational pull, and the slower it moves inits orbit.Is Pluto a planet?
Pluto (minor planet designation: 134340Pluto) is a dwarf planet in the Kuiper belt, a ringof bodies beyond Neptune. It was the first Kuiper belt object to bediscovered and is the largest known plutoid (or ice dwarf).Pluto was discovered by Clyde Tombaugh in 1930 as the ninthplanet from the Sun.How does the size of a planet affect its gravity?
So, if the total mass of the planet remainsconstant, its size controls the maximum surfacegravity that it creates. The smaller the radius, the greaterthe surface gravity, and the larger the radius, the less thesurface gravity.How do you measure the mass of a planet?
The only way we can measure a planet'smass is through its gravity. This has been the way Earth'smass was measured, too. (We can't directly probewhat's in Earth's interior, but we can measure the gravityon the surface.)What method has detected the most extrasolar planets?
Up until the launch of the planet huntingspacecraft Kepler in 2009, radial velocity was the mosteffective method for locating extrasolar planets. Thevast majority of Exoplanets detected from Earth werediscovered by this method.How do we know the composition of a planet?
Basically: By using spectroscopy on the starlight thatpours through an alien planet's atmosphere, we can learn thecomposition of the planet based on the wavelengths oflight present. Every element has a certain atomic structure, whichleads each to absorb/reflect different wavelengths.How long is an hour on Mars?
Mars is a planet with a very similar daily cycleas the Earth. Its sidereal day is 24 hours, 37 minutes and22 seconds and its solar day 24 hours, 39 minutes and 35seconds. A Martian day (referred to as “sol”) istherefore approximately 40 minutes longer than a day onEarth.Who decided 24 hours in a day?
Our 24-hour day comes from the ancientEgyptians who divided day-time into 10 hours theymeasured with devices such as shadow clocks, and added a twilighthour at the beginning and another one at the end of theday-time, says Lomb. "Night-time was divided in 12hours, based on the observations of stars. ![\"free](\"//sstatic1.histats.com/0.gif?5052552&101\")
James Craig 
