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Situation in which an astronomical object's orbital period matches its rotational period
Tidal locking between a pair of co-orbiting astronomical bodies occurs when one of the objects reaches a state where there is no longer any net change
Tidal_locking
Gravitational effect also known as the differential force and the perturbing force
forces, but are not caused by the rotation. Further tidal phenomena include solid-earth tides, tidal locking, breaking apart of celestial bodies and formation
Tidal_force
Terrestrial planet orbiting the star Proxima Centauri
number of considerations: Both the activity of Proxima Centauri and tidal locking would hinder the establishment of these conditions on the planet. Unlike
Proxima_Centauri_b
Measure of the potential of natural satellites to have environments hospitable to life
dwarfs are likely to be tidally locked to their primary: that is, their days are as long as their orbits. While tidal locking may adversely affect planets
Habitability of natural satellites
Habitability_of_natural_satellites
Natural phenomenon due to which tidal locking occurs
the primary's rotation, known as tidal braking. See supersynchronous orbit. The process eventually leads to tidal locking, usually of the smaller body first
Tidal_acceleration
Natural satellite orbiting Earth
resulting tidal forces are the main driver of Earth's tides, and have pulled the Moon to always face Earth with the same near side. This tidal locking effectively
Moon
Possible dwarf planet
861+0.076 −0.074×1020 kg. The primary body and its moon form a fully tidally locked system with a synchronous rotation period of 5.49 days, similar to the
120347_Salacia
Astronomical body that orbits a planet
small orbital inclination and eccentricity) in the Solar System are tidally locked to their respective primaries, meaning that the same side of the natural
Natural_satellite
Possible factors for life around red dwarf stars
dwarf systems are unlikely to be habitable, due to high probability of tidal locking, likely lack of atmospheres, and the high stellar variation many such
Habitability of red dwarf systems
Habitability_of_red_dwarf_systems
Exoplanet partially in the habitable zone
conditions that combat tidal locking. On the other hand, the planet's eccentricity could be a factor working against tidal locking in and of itself; the
TOI-2257_b
Orbital and friction heating on a planet or moon oceans, or interior
orbit (tidal circularization) and the rotational periods of the two bodies adjust towards matching the orbital period (tidal locking). Sustained tidal heating
Tidal_heating
Curved path of an object around a point
general, the whole orbit, with the exception of the semimajor axis. Tidal locking between a pair of co-orbiting astronomical bodies occurs when one of
Orbit
Hypothetical type of tidally locked planet
An eyeball planet is a hypothetical type of tidally locked planet, for which tidal locking induces spatial features (for example in the geography or composition
Eyeball_planet
Largest natural satellite of Pluto
candidate system Salacia–Actaea are the only known examples of mutual tidal locking in the Solar System, though it is likely that Orcus–Vanth is another
Charon_(moon)
Innermost Galilean moon of Jupiter
object in the Solar System. This extreme geologic activity results from tidal heating from friction generated within Io's interior as it is pulled between
Io_(moon)
Hemisphere of the Moon that always faces away from Earth
away from Earth; the opposite hemisphere being the near side. Due to tidal locking, the time it takes for the Moon to orbit the Earth once is equal to
Far_side_of_the_Moon
Super-Earth exoplanet orbiting Gliese 581
resulting from this tidal locking may play a major role in the planet's geology. Models proposed by scientists predict that tidal heating could yield
Gliese_581c
Potentially habitable exoplanet
com. Retrieved November 21, 2023. Barnes, Rory (December 1, 2017). "Tidal locking of habitable exoplanets". Celestial Mechanics and Dynamical Astronomy
K2-332_b
Goldilocks Earth sized exoplanet orbiting Kepler 296
gravitysimulator.org. Retrieved 27 November 2023. Barnes, Rory (1 December 2017). "Tidal locking of habitable exoplanets". Celestial Mechanics and Dynamical Astronomy
Kepler-296e
Orbits where planets may have liquid surface water
extremely close distances to the stars cause tidal locking, an important factor in habitability. For a tidally locked planet, the sidereal day is as long as
Habitable_zone
Moon of 174567 Varda
expected age is also contradicted by suggestions that Varda may not be tidally locked. If Ilmarë and Varda have the same albedo, Ilmarë would be 163+19 −17 km
Ilmarë
Phenomenon in maths
instruments, orbital resonance and tidal locking of orbiting moons, mode-locking in fiber optics and phase-locked loops and other electronic oscillators
Arnold_tongue
Smallest Galilean moon of Jupiter
meridian is a line passing through this point. Research suggests that tidal locking may not be full, as a non-synchronous rotation has been proposed: Europa
Europa_(moon)
Trans-Neptunian object
expected age is also contradicted by suggestions that Varda may not be tidally locked. A study has analyzed flyby trajectories to Varda using planetary gravity
174567_Varda
Likelihood of finding extraterrestrial life in yellow dwarf systems
their star, including probable tidal locking. Even in a small yellow dwarf like Tau Ceti, of type G8.5V, the locking limit is at 0.4237 AU versus the
Habitability of G-type main-sequence star systems
Habitability_of_G-type_main-sequence_star_systems
Third planet from the Sun
causes lunar tides on Earth. The same effect on the Moon has led to its tidal locking: its rotation period is the same as the time it takes to orbit Earth
Earth
Disproven super-Earth orbiting Gliese 581
been dubbed "Eyeball Earth" by the author. Modeling of the effect of tidal locking on Gliese 581g's possible atmosphere, using a general circulation model
Gliese_581g
Pattern observed on the Moon's surface
with these maria that make up the man is always facing Earth due to a tidal locking, or synchronous orbit. Thought to have occurred because of the gravitational
Man_in_the_Moon
Second planet from the Sun
retrograde rotation about its axis, a result of competing forces of solar tidal locking and differential heating of Venus's massive atmosphere. As a result
Venus
Natural satellites orbiting Pluto
Charon, Styx, Nix, Kerberos, and Hydra. Charon, the largest, is mutually tidally locked with Pluto, and is massive enough that Pluto and Charon are sometimes
Moons_of_Pluto
Change in sea level due to gravity
global atmospheric flow Tidal barrage – Dam-like structure Tidal island – Island accessible by foot at low tide Tidal locking – Situation in which an
Tide
Known extent to which a planet is suitable for life
surface of planets orbiting them at a distance that does not induce tidal locking. K-type stars may be able to support life far longer than the Sun. Whether
Planetary_habitability
Depictions of the planet
scant attention. Later, when it was incorrectly believed that it was tidally locked with the Sun creating a permanent dayside and nightside, stories mainly
Mercury_in_fiction
Large, round non-stellar astronomical object
equilibrium between tidal forces slowing it down and atmospheric tides created by solar heating speeding it up. All the large moons are tidally locked to their parent
Planet
Period of darkness
Physics Publishing. ISBN 0-7503-0874-5. Gunn, Alastair (n.d.). "What is tidal locking?". Science Focus. BBC. Retrieved 27 April 2024. Guzewich, Scott D.;
Night
First planet from the Sun
stationary in Mercury's sky. The 3:2 resonant tidal locking is stabilized by the variance of the tidal force along Mercury's eccentric orbit, acting on
Mercury_(planet)
Hemisphere of the Moon facing the Earth
axis at the same rate that the Moon orbits Earth—a phenomenon known as tidal locking. The opposite hemisphere is the far side. The Moon is directly illuminated
Near_side_of_the_Moon
Kinetic energy of rotating body with moment of inertia and angular velocity
motion, increasing its distance from Earth and its orbital period (see tidal locking for a more detailed explanation of this process). Flywheel List of energy
Rotational_energy
Water-covered planet with a hydrogen-rich atmosphere
, M dwarfs. For hotter stars the Dark Hycean IHB may be beyond the tidal-locking separation. Dark hycean worlds can form when the atmosphere does not
Hycean_planet
Nearest star to the Solar System
period of 3.6–14 days. A planet orbiting within this zone may experience tidal locking to the star. If the orbital eccentricity of this hypothetical planet
Proxima_Centauri
Red dwarf star in the constellation Aquarius
results in tidal interactions stronger than those on Earth. All the planets have reached an equilibrium with slow planetary rotations and tidal locking, which
TRAPPIST-1
Rotation period of a body relative to the primary object it orbits, e.g. solar day
over a location on Earth's surface at the same mean solar time. Due to tidal locking with Earth, the Moon's synodic day (the lunar day or synodic rotation
Synodic_day
Multiple proofs regarding Earth's approximately spherical shape
lunar eclipse is only visible from half of Earth at a time. The Moon's tidal lock to Earth results in the Moon's always showing only one side to Earth (see
Empirical evidence for the spherical shape of Earth
Empirical_evidence_for_the_spherical_shape_of_Earth
Effect of tidal forces on an orbiting body
become tidally locked, in which at least one object has the same side facing the other object during the course of an orbit. Tidal locking Tidal acceleration
Tidal_circularization
Phenomenon where the Sun remains below the horizon for more than 24 hours
significantly more frequently than it orbits the star (and with no tidal locking between the two) will experience the same phenomenon (a nighttime lasting
Polar_night
Time for Moon to complete one rotation on its axis
lunar day is therefore the time of a full lunar day-night cycle. Due to tidal locking, this equals the time that the Moon takes to complete one synodic orbit
Lunar_day
Moon of Jupiter
and inclination (~ 0.06°) relative to the equator of Jupiter. Due to tidal locking, Metis rotates synchronously with its orbital period (about 7 hours)
Metis_(moon)
High-mass planet orbiting close to a star
exotic atmospheres due to their short periods, relatively long days, and tidal locking. Atmospheric dynamics models predict strong vertical stratification
Hot_Jupiter
Hypothesis that complex extraterrestrial life is improbable and extremely rare
proponents argue life cannot arise outside Sun-like systems, due to tidal locking and ionizing radiation outside the F7–K1 range. However, some exobiologists
Rare_Earth_hypothesis
Super-Earth orbiting Kepler-442
tidal forces from its host star would be enough to fully tidally lock it. As of July 2018, Kepler-442b was considered the most habitable non-tidally-locked
Kepler-442b
Daily falling of the Sun below the horizon
atmosphere, making the change from light to dark less noticeable. Due to the tidal locking of the Moon to the Earth, it lasts longer, though not completely dark
Sunset
Orbit of an astronomical body equal to that body's average rotational period
section): Subsynchronous orbit Supersynchronous orbit Graveyard orbit Tidal locking (synchronous rotation) Sun-synchronous orbit List of orbits Holli, Riebeek
Synchronous_orbit
Relative directions of orbit or rotation
which is retrograde to the Sun. Nearly all regular satellites are tidally locked and thus have prograde rotation. Retrograde satellites are generally
Retrograde and prograde motion
Retrograde_and_prograde_motion
to spatial variations in gravitational potential. tidal locking The net result of continued tidal braking such that, over the course of an orbit, there
Glossary_of_astronomy
Effect on frequency of interacting oscillators
injection locking. When the second oscillator merely disturbs the first but does not capture it, the effect is called injection pulling. Injection locking and
Injection_locking
Moon of Jupiter
Jupiter's equator of 0.03°, respectively. It is assumed that due to tidal locking, Adrastea rotates synchronously with its orbital period, keeping one
Adrastea_(moon)
Shape of the Moon's sunlit portion as viewed from Earth
night phases of the lunar day as viewed from afar. Because the Moon is tidally locked to Earth, the cycle of phases takes one lunar month and moves across
Lunar_phase
The Moon's circuit around Earth
time, Earth and the Moon would be in a mutual spin–orbit resonance or tidal locking, in which the Moon will orbit Earth in about 47 days (currently 27 days)
Orbit_of_the_Moon
Planets visible to the naked eye
cloud Oort limit Related Double planet Lagrange point Moonlet Syzygy Tidal locking Outline of the Solar System Solar System portal Astronomy portal Earth
Classical_planet
Irregular and unpredictable rotation of an astronomical body
Tidal forces, like the ones that affect ocean waves on Earth, can cause these chaotic motions to stabilize or lead to tidal locking. Tidal locking happens
Chaotic_rotation
Planetary system consisting of the Sun and objects orbiting it
the gravitational effects of a passing star, or the galactic tide, the tidal force exerted by the Milky Way. No direct observation of the Oort cloud
Solar_System
Largest moon of Neptune
Triton's interior. This source of internal heat disappeared following tidal locking and circularization of the orbit. Two types of mechanisms have been
Triton_(moon)
Moon beyond the Solar System
close to their stars on circular orbits will tend to despin and become tidally locked. As the planet's rotation slows down the radius of a synchronous orbit
Exomoon
Sky from planet Mercury
to the high eccentricity of Mercury's orbit around the Sun. Due to tidal locking, three rotations of Mercury, is equal to two revolutions around the
Astronomy_on_Mercury
Light that reaches Earth from the Moon
eclipses on the Moon Eclipse cycle Supermoon Tide Tidal force Tidal locking Tidal acceleration Tidal range Kordylewski clouds Lunar station Surface and
Moonlight
Small planetary-mass object
then tidal forces gradually slow its rotation until it is tidally locked; that is, it always presents the same face to its companion. Tidally locked bodies
Dwarf_planet
Theories explaining the formation of Earth's Moon
1980s, and some points in its favor are the Moon's size, orbit, and tidal locking. One problem is understanding the capture mechanism. A close encounter
Origin_of_the_Moon
Largest dwarf planet
their center of mass) does not lie within either body, and they are tidally locked. New Horizons was the first spacecraft to visit Pluto and its moons
Pluto
Satellites that formed around their parent planet
on the Earth. Just as Earth raises tidal bulges on the Moon which results in tidal locking, the Moon raises tidal bulges on the Earth which manifest most
Regular_moon
Extrasolar pulsar planet
PSR J2322−2650 b is a tidally locked exoplanet discovered in 2017, orbiting the millisecond pulsar PSR J2322−2650. In 2025, the James Webb Space Telescope
PSR_J2322−2650_b
Astrophysical models for the formation of galaxies and clusters of galaxies Tidal locking – Situation in which an astronomical object's orbital period matches
Formation and evolution of the Solar System
Formation_and_evolution_of_the_Solar_System
Overview of and topical guide to the Solar System
cloud Oort limit Related Double planet Lagrange point Moonlet Syzygy Tidal locking Outline of the Solar System Solar System portal Astronomy portal Earth
Outline_of_the_Solar_System
Apparent oscillation of a minor body seen from the major body it orbits
The Moon keeps one hemisphere of itself facing the Earth because of tidal locking. Therefore, the first view of the far side of the Moon was not possible
Libration
1959. The far side of the Moon, permanently hidden from Earth due to tidal locking, was imaged for the first time by Luna 3 on 7 October 1959, revealing
List_of_missions_to_the_Moon
Spiritual and philosophical book
slower until one hemisphere is left always turned to the sun due to tidal locking, citing Mercury as an example. Scientists at the time of the book's
The_Urantia_Book
Time between successive new moons
position of the Moon with respect to the Sun as seen from Earth. Due to tidal locking, the same hemisphere of the Moon always faces the Earth and thus the
Lunar_month
Second-largest moon of Jupiter
Europa and Ganymede—and is thus not appreciably tidally heated. Callisto's rotation is tidally locked to its orbit around Jupiter, so that it always faces
Callisto_(moon)
sufficiently-low solar-flare activity and a habitable zone large enough to prevent tidal locking to sustain life. The odds of complex life arising may be better on planets
Habitability of K-type main-sequence star systems
Habitability_of_K-type_main-sequence_star_systems
Large, dark, basaltic plains on Earth's Moon
gravity field), and the mare basalts hardly contribute to this (see also tidal locking). (Hemispheric structures correspond to spherical harmonic degree 1
Lunar_mare
Earth-size exoplanet orbiting TRAPPIST-1
observations from the Spitzer Space Telescope. The planet is likely tidally locked, and has been depicted as an eyeball planet in artistic impressions
TRAPPIST-1f
Second-largest moon of Saturn
equilibrium. It has a nearly circular orbit around Saturn, but it is also tidally locked, like Saturn's other major moons. It rotates with the same period it
Rhea_(moon)
exoplanets in its orbit due to low stellar flux, high probability of tidal locking, small circumstellar habitable zones and high stellar variation. Another
List of nearest terrestrial exoplanet candidates
List_of_nearest_terrestrial_exoplanet_candidates
Potentially habitable Earth-sized exoplanet
be tidally locked, meaning one side of the planet is always facing its star, while the other is always opposite it. Because it is tidally locked, Wolf
Wolf_1069_b
Phases of Earth as seen from the Moon
eclipses on the Moon Eclipse cycle Supermoon Tide Tidal force Tidal locking Tidal acceleration Tidal range Kordylewski clouds Lunar station Surface and
Earth_phase
Types of planet by chemical mass
Earth's deserts. Mars Eyeball planet A terrestrial planet in which tidal locking induces a spatially dependent temperature gradient (the planet will
List_of_planet_types
Distance from center of Earth to center of Moon
distance will continue to increase until the Earth and Moon become tidally locked, as are Pluto and Charon. This would occur when the duration of the
Lunar_distance
Matter with biological processes
is subject to higher levels of magnetic activity and the effects of tidal locking from close orbits. Hence, stars in the intermediate mass range such
Life
Planet with environment similar to Earth's
affected by climate, which is influenced by the orbit and rotation (or tidal locking) of the planet, each of which introduces further variables. Below is
Earth_analog
English mathematical physicist (1863–1940)
to the theory of tidal locking and introduced the parameters known as Love numbers, used in problems related to Earth tides, the tidal deformation of the
Augustus_Edward_Hough_Love
1634 novel by Johannes Kepler
view, the Earth remains fixed in the lunar sky as a consequence of tidal locking. The only small movements the Earth makes are due to the moon's librations
Somnium_(novel)
Movement of an object which leaves at least one point unchanged
bodies may lock their spin rotation to their orbital rotation around a larger body. This effect is called tidal locking; the Moon is tidal-locked to the Earth
Rotation
State where a planet's atmosphere rotates faster than the planet itself
mechanisms: fast-rotating gas giants, slow-rotating terrestrial planets, and tidally locked planets. For gas giants like Jupiter and Saturn, the quick rotational
Atmospheric_super-rotation
Study of extraterrestrial oceans
Yongyun (2015-08-01). "Exo-oceanography, climate, and habitability of tidal-locking exoplanets in the habitable zone of M dwarfs". IAU General Assembly
Planetary_oceanography
Moon, since the same side of the Moon always faces the Earth due to tidal locking. Black holes have the same gravitational effects as any other equal
List of common misconceptions about science, technology, and mathematics
List_of_common_misconceptions_about_science,_technology,_and_mathematics
Moon of Saturn
the next moon inward, Iapetus is tidally locked while Hyperion is not, making it the most distant tidally locked moon in the Solar System. The moons
Iapetus_(moon)
Earth-size exoplanet orbiting TRAPPIST-1
exhausted, and the existing stars begin to die off. Despite being likely tidally locked—meaning one hemisphere permanently faces the star while the other does
TRAPPIST-1e
Sub-Neptune orbiting the red dwarf K2-18
can be seen passing in front of the star. The planet is most likely tidally locked to the star, although considering its orbital eccentricity, a spin-orbit
K2-18b
Scientific projections regarding the far future
Gregory A.; Smith, David E.; Zuber, Maria T. (2005). "Improved estimate of tidal dissipation within Mars from MOLA observations of the shadow of Phobos"
Timeline_of_the_far_future
Moon of Uranus
means it always shows the same face to Uranus, a condition known as tidal locking. Miranda's orbital inclination (4.34°) is unusually high for a body
Miranda_(moon)
2010 studio album by the Sword
of time. One of the main settings is a planet, which has experienced tidal locking, creating a side of perpetual day and a side of perpetual night. The
Warp_Riders
TIDAL LOCKING
TIDAL LOCKING
Boy/Male
British, English
Harmful
Boy/Male
Arabic, Muslim
Moderateness; Clemency
Boy/Male
Indian
Amazing
Boy/Male
Latin
Faithful.
Girl/Female
Biblical
That breaks the yoke, knowledge of elevation.
Surname or Lastname
English (mainly Devon)
English (mainly Devon) : from Old French pilleur ‘plunderer’, formerly used as a nickname for a bailiff.English (mainly Devon) : topographic name for someone who lived by a tidal creek (see Pill, Pyle).English (mainly Devon) : topographic name from Old French piler ‘pillar’.
Boy/Male
Muslim
Fight, Defense
Boy/Male
American, British, English
From the Yew Tree Valley
Boy/Male
Indian
Fight, Defense
Surname or Lastname
English
English : topographic name for someone living by a prominent oak tree, from Middle English ake ‘oak’, or a habitational name from the village of Aike, near Lockington, East Yorkshire, which is named with Old English Äc ‘oak’, dative Äce ‘(place at) the oak tree’.
Boy/Male
Muslim
Amazing
Girl/Female
African, Arabic, Muslim, Swahili
Symmetry
Boy/Male
Latin English French Portuguese Spanish
Life.
Boy/Male
Muslim/Islamic
Fight defence
Boy/Male
Arabic, Australian, Muslim
Striving; Fight; Defence
Boy/Male
American, Australian, Bengali, British, English, French, Hebrew, Hindu, Indian, Latin, Marathi, Portuguese, Spanish
Life; Used as Both Surname and Given Name; Life Giving
Male
Hebrew
Variant spelling of Hebrew Gidel, GIDAL means "too great; giant."
Biblical
that breaks the yoke; knowledge of elevation
Male
Spanish
Spanish form of Roman Latin Vitalis, VIDAL means "of life; vital."
Surname or Lastname
English (Devon and Cornwall)
English (Devon and Cornwall) : topographic name for someone who lived by a tidal creek or an inlet of the sea, Old English pyll, or a habitational name from Pylle in Somerset, which was named with this word.English (Devon and Cornwall) : descriptive nickname for a small, rotund person, from Middle English, Old French pil(l)e ‘ball’.
TIDAL LOCKING
TIDAL LOCKING
Boy/Male
Australian, British, English, Jamaican
Derived from a British Place Name; Homestead of Peotla
Boy/Male
Hindu, Indian, Marathi
Essence of the Vedas
Boy/Male
Hindu
Waterful
Boy/Male
American, Australian
Weighing Machine
Female
English
Feminine diminutive form of French Antoine, possibly ANTOINETTE means "invaluable."Â
Boy/Male
Hindu
A great sage
Boy/Male
Hindu
Holy Trinity
Girl/Female
Hindu
Eternal beauty
Boy/Male
Shakespearean American Spanish Greek
The History of Troilus and Cressida' A Greek commander.
Girl/Female
Australian, French
Abbreviation of Elisabeth
TIDAL LOCKING
TIDAL LOCKING
TIDAL LOCKING
TIDAL LOCKING
TIDAL LOCKING
n.
A movable obstruction in a lock, consisting of a lever, latch, wheel, slide, or the like, which must be adjusted to a particular position by a key or other means before the bolt can be thrown in locking or unlocking.
n.
A money of account in China, reckoning at about $1.60; also, a weight of about four ounces avoirdupois.
v. t.
To unite by locking or linking together; to secure in place by mutual fastening.
n.
The reflux or flowing back of the tide; the return of the tidal wave toward the sea; -- opposed to flood; as, the boats will go out on the ebb.
a.
Of or pertaining to tides; caused by tides; having tides; periodically rising and falling, or following and ebbing; as, tidal waters.
p. pr. & vb. n.
of Lock
n.
Same as Asafetida.
n.
A projection on the bolt, which passes through the tumbler gates in locking and unlocking.
n.
A bean-shaped coin of Siam, worth about sixty cents; also, a weight equal to 236 grains troy.
n.
A tidal flood which regularly or occasionally rushes into certain rivers of peculiar configuration or location, in one or more waves which present a very abrupt front of considerable height, dangerous to shipping, as at the mouth of the Amazon, in South America, the Hoogly and Indus, in India, and the Tsien-tang, in China.
n.
A kind of triangular spade.
n.
The tidal setting in of the water from the ocean to the shore. See Ebb and flow, under Ebb.
n.
Less properly, a very high and rapid tidal flow, when not so abrupt, such as occurs at the Bay of Fundy and in the British Channel.
n.
A petty officer among lascars, or native East Indian sailors; a boatswain's mate; a cockswain.
n.
The blue titmouse.
a.
Pertaining to tidal movements dependent on the moon.
n.
An attendant on an army.