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Anomaly may refer to:

• Eccentric anomaly, the angle between the direction of periapsis and the current position of an object on its orbit
• Flyby anomaly, an unexpected energy increase during Earth flybys of satellites
• Mean anomaly, a measure of time in the study of orbital dynamics
• Pioneer anomaly, the observed deviation of the trajectories of various unmanned spacecraft
• South Atlantic Anomaly, the region where Earth's inner van Allen radiation belt makes its closest approach to the planet's surface
• True anomaly, the angle between the direction of periapsis and the current position of an object on its orbit

• Bouguer anomaly, an anomaly in gravimetry
• Free-air anomaly, the gravity anomaly that has been computed for latitude and corrected for elevation of the station
• Gravity anomaly, the difference between the observed gravity and a value predicted from a model
• Iridium anomaly, a very rare element in the Earth's crust
• Kursk Magnetic Anomaly, a territory rich in iron ores located within Kursk Oblast, Belgorod Oblast, and Oryol Oblast

• Congenital vertebral anomaly, a collection of malformations of the spine in animals and infants
• Collie eye anomaly, a congenital, inherited, bilateral eye disease of dogs involving the retina, choroid, and sclera
• Coronary artery anomaly, a congenital abnormality in the coronary anatomy of the heart
• Ebstein's anomaly, a congenital heart defect in which the opening of the tricuspid valve is displaced towards the right ventricle of the heart
• Uhl anomaly, a very seldom congenital heart disease with a partial or total loss of the myocard muscle in the righter ventricle

• Anomaly (physics), the failure of a symmetry of a theory's classical action
• Conformal anomaly, a quantum phenomenon that breaks the conformal symmetry of the classical theory
• Chiral anomaly, the anomalous nonconservation of a chiral current
• Gauge anomaly, an effect of quantum mechanics that invalidates the gauge symmetry of a quantum field theory
• Global anomaly, an anomaly in quantum physics
• Gravitational anomaly, an effect of quantum mechanics that invalidates the general covariance of a theory of general relativity
• Mixed anomaly, an effect of quantum mechanics
• Parity anomaly, an anomaly associated with parity

• Ararat anomaly, an object on Mount Ararat claimed to be Noah's Ark

• Anomaly (comics), a DC Comics villain
• Konishi anomaly, the violation of the conservation of the Noether current associated with certain transformations
• Market anomaly, a price distortion on a financial market
• Anomaly in software, everything that differs from expectation. This expectation can result from a document or from a persons notion or experiences.
• Anomaly (music), a Danish rock'n'metal band
• "Anomaly" (Enterprise episode), a third season episode of Star Trek: Enterprise
• Spatial anomaly, a very broad term for any sort of extraordinary disruption in the space-time continuum in the fictional universe of Star Trek
• Time anomaly, a fictional phenomena from the TV series Primeval
• Anomalies, a musical album by Cephalic Carnage.
• Anomalies, small areas in the game S.T.A.L.K.E.R.: Shadow of Chernobyl which have different effects on the game environment.
• Anna-Molly, a song by Incubus whose title sounds like "anomaly" when sung. It refers to "a woman who may or may not exist in real life".

• Anomalous phenomenon
• Irregular

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