Any change in the speed with which an object moves, or the direction in which it moves.

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Active Galactic Nucleus

The central portion of a galaxy which gives off unusually large amounts of energy. These are thought to be powered by supermassive Black Holes.

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The height of the peak of a wave, measured relative to its center. Equivalently, the depth of the trough of a wave.

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Essentially, the "opposite" of a particle. Every type of matter has a corresponding antiparticle, with the same mass but opposite charge, for example. Other numbers describing the particle will be reversed for the antiparticle.

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Atomic Nucleus

The central part of an atom, which contains Neutrons and Protons. Electrons are usually found around the Nucleus. Strictly speaking, this is the only part of an atom involved in Nuclear Reactions (Fission or Fusion).

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Four Areas of Science


endless, and sublime,
The image of eternity—
the Throne of the Invisible...

From Lord Byron's Childe Harold's Pilgrimage
Canto IV,
Stanza 183

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About SXS

The SXS project is a collaborative research effort involving multiple institutions. Our goal is the simulation of black holes and other extreme spacetimes to gain a better understanding of Relativity, and the physics of exotic objects in the distant cosmos.

The SXS project is supported by Canada Research Chairs, CFI, CIfAR, Compute Canada, Max Planck Society, NASA, NSERC, the NSF, Ontario MEDI, the Sherman Fairchild Foundation, and XSEDE.

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