General astronomy

General astronomy

Contributors in General astronomy

General astronomy

The antiparticle of a neutron. A neutron and antineutron both have the same mass and zero electric charge, but can be differentiated by their interactions: a neutron and an antineutron can annihilate ...

antiparticle

Astronomy; General astronomy

1) An elementary particle of opposite charge but otherwise identical to its partner. Most of the observable universe consists of particles and matter, as opposed to antiparticles and antimatter. 2) ...

antiproton

Astronomy; General astronomy

The antiparticle of a proton, identical in mass and spin but of opposite (negative) charge.

antiquark

Astronomy; General astronomy

The antiparticle of the quark.

anti-reflection coating

Astronomy; General astronomy

Also AR coating. A layer of material of lower refractive index of just the right thickness (1/4 wave) is deposited on the optical surface to be coated. More complex coatings are possible which cover ...