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In some cases where the orbit is eccentric and the tidal effect is relatively weak, the smaller body may end up in a so-called spin–orbit resonance, rather than being tidally locked. Here, the ratio of the rotation period of a body to its own orbital period is some simple fraction different from 1:1.
In the local (primarily thin) disk of the Milky Way, there appears to be no evidence of a strong AMR. [12] A sample of 229 nearby "thick" disk stars has been used to investigate the existence of an age-metallicity relation in the Galactic thick disk and indicates that there is an age-metallicity relation present in the thick disk.
All eight planets in the Solar System orbit the Sun in the direction of the Sun's rotation, which is counterclockwise when viewed from above the Sun's north pole. Six of the planets also rotate about their axis in this same direction. The exceptions – the planets with retrograde rotation – are Venus and Uranus.
Earth's rotation or Earth's spin is the rotation of planet Earth around its own axis, as well as changes in the orientation of the rotation axis in space. Earth rotates eastward, in prograde motion. As viewed from the northern polar star Polaris, Earth turns counterclockwise.
The Jupiter Effect is a 1974 book by John Gribbin and Stephen Plagemann, in which the authors predicted that an alignment of the planets of the Solar System would create a number of catastrophes, including a great earthquake on the San Andreas Fault, on March 10, 1982. [1] [2] [3] The book became a best-seller. [4] The predicted catastrophes ...
Earth’s inner core, a red-hot ball of iron 1,800 miles below our feet, stopped spinning recently, and it may now be reversing directions, according to an analysis of seismic activity.
That’s the question the band allows us to explore together in one of the most beautiful and bittersweet songs ever recorded, off of their 2024 album The Moon Is in the Wrong Place. Shannon’s ...
This plot shows the distribution of rotation periods for 15,000 minor planets, plotted against their diameters. Most bodies have a period between 2 and 20 hours. [1] [a] This is a list of slow rotators—minor planets that have an exceptionally long rotation period.