Space exploration began with the launch of Sputnik and Astrophysics was born as the application of physics to the phenomena observed by Astronomy, which etymologically means laws of the stars.
There are 2759 entries in this glossary.| Term | Definition |
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| Hexahedrite |
A type of iron meteorite containing less than 6 per cent nickel by weight. Hexahedrites contain the form of iron-nickel alloy called kamacite, which has cubic symmetry. The polished surfaces of such meteorites are featureless except for numerous striations, called Neumann lines, which occur in some examples. They are caused by shock deformation.
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