McLean 1, 7 What would the characteristics of this planet such as mass, radius etc. Rotation Time in astronomy. Sign up using Email and Password. If a planet aquired a large moon the moons size, orbital period and direction could easily speed up or slow down a planets rotation by a large margin over a long enough period. For instance, Mars' day is about the same length as Earth, while a day on Venus is equivalent to Earth days source. What determines the length of a day on a planet?
Rotation speed at the equator and Mean orbital velocity around Sun ofMercury, Venus,Earth,Mars,Jupiter,Saturn,Uranus,Neptune,Pluto. In astronomy, the rotation period of a celestial object is the time that it takes to complete one revolution around its axis of rotation relative to the background stars.
It differs from the planet's solar day, which includes an extra fractional rotation. of astronomical bodies · Retrograde motion · Rotational speed · Synodic day.
Video: Planet rotation speed Solar System Model (Accurate Speed Animation)
ROTATION AS A FUNCTION OF GRAVITY———————— The approach is to find an equation (with minimum number of variables [Occam's razor / "law of.
In addition, they all rotate in the same general direction, with the exceptions of Venus and Uranus. McLean 1, 7 It differs from the planet's solar day, which includes an extra fractional rotation needed to accommodate the portion of the planet's orbital period during one day.
The sun itself rotates slowly, only once a month.
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|Of course an old planet implies an old star, that is a long-lived one, so we are again back at the requirement at a small star.
Views Read Edit View history. The length of a day on different planets in the solar system varies a lot. During the night, constant darkness would send the temperature plummiting. For objects that are not spherically symmetricalthe rotation period is, in general, not fixed, even in the absence of gravitational or tidal forces.
For instance, Mars' day is about the same length as Earth, while a day on Venus is equivalent to Earth days source.
It's because most satellite in the solar system are tidal locked.
It is believed that the long rotational period of these planets is. The speed a planet rotate depends on the angular momentum it has after.
The rotating clouds flatten into protostellar disks, out of which individual stars and their planets form.
The most extreme case is when the planet is tidally locked to the star, so that the sidereal day is exactly the same length as a year; then the solar day is infinite the sun always sits on the same place. George Spagna, chair of the physics department at Randolph-Macon College, explains. Please help by spinning off or relocating any relevant information, and removing excessive detail that may be against Wikipedia's inclusion policy.
These differences are believed to stem from collisions that occurred late in the planets' formation. Basically the solar day is the sidereal day rotation period of the planet times one plus or minus sign depending on the rotational direction of the planet relative to its revolution the inverse of the number of days in the year.
It is believed that the long rotational period of these planets is caused by different but related mechanisms - tidal locking for Venus gravity interacting with it's thick atmosphere and gravitational locking on Mercury being closest to the sun.
Planet rotation speed
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I assume you mean the solar day determined e. Planets form from material in this disk, through accretion of smaller particles. Sign up using Facebook.
Orbital Speed of Planets in Order Rotational Speed Comparison
JessWelch 1 4 This page was last edited on 7 Octoberat Sign up or log in Sign up using Google.
Stars and planets form in the collapse of huge clouds of interstellar gas and dust. As her arms come closer to her axis of rotation, her speed increases and her.
What determines the length of a day on a particular planet?
The speed a planet rotate depends on the angular momentum it has after forming. These tables were used to calculate the world's ephemerides between andso this second became known as the ephemeris second. Inserting the previous estimation of the planet's distance as function of the stellar mass, you get.
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|A similar collision is believed to have led to the formation of our moon.
However, the star is not the only source of tidal forces; indeed, on earth the biggest tidal forces don't come from the sun, but from the moon.
As an interstellar cloud collapses, it fragments into smaller pieces, each collapsing independently and each carrying part of the original angular momentum. To have a maximal effect on the day length, you want the year as short as possible, that is you want to have a small star ideally a red dwarfand you want your planet on the inner edge of the habitable zone.
Video: Planet rotation speed Speed of Earth's Rotation