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In physics and astronomy, Euler's three-body problem is to solve for the motion of a particle that is acted upon by the gravitational field of two other point masses that are fixed in space. This problem is exactly solvable, and yields an approximate solution for particles moving in the gravitational fields of prolate and oblate spheroids.
List of unsolved problems in physics. The following is a list of notable unsolved problems grouped into broad areas of physics. [1] Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result. The others are experimental, meaning ...
Falling cat problem. A falling cat modeled as two independently rotating parts turns around while maintaining zero net angular momentum. The falling cat problem is a problem that consists of explaining the underlying physics behind the observation of the cat righting reflex . Although amusing and trivial to pose, the solution of the problem is ...
The three-body problem is a special case of the n-body problem. Historically, the first specific three-body problem to receive extended study was the one involving the Moon, Earth, and the Sun. In an extended modern sense, a three-body problem is any problem in classical mechanics or quantum mechanics that models the motion of three particles.
The Yang–Mills existence and mass gap problem is an unsolved problem in mathematical physics and mathematics, and one of the seven Millennium Prize Problems defined by the Clay Mathematics Institute, which has offered a prize of US$1,000,000 for its solution. The problem is phrased as follows: Yang–Mills Existence and Mass Gap.
The strong CP problem is sometimes regarded as an unsolved problem in physics, and has been referred to as "the most underrated puzzle in all of physics." [1] [2] There are several proposed solutions to solve the strong CP problem. The most well-known is Peccei–Quinn theory, [3] involving new pseudoscalar particles called axions .
Solving the classical two-body problem for an electron orbiting an atomic nucleus is misleading and does not produce many useful insights. Reduction to two independent, one-body problems [ edit ] This section duplicates the scope of other articles , specifically Classical central-force problem#Relation to the classical two-body problem .
v. t. e. The two-body problem in general relativity (or relativistic two-body problem) is the determination of the motion and gravitational field of two bodies as described by the field equations of general relativity. Solving the Kepler problem is essential to calculate the bending of light by gravity and the motion of a planet orbiting its sun.
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