Astronomy Glossary
There are currently 2 names in this directory beginning with the letter T.
T
terminator
The line that divides the illuminated side of a moon or planet from its dark side. The line moves as the object rotates with respect to its parent star.
transparent
Able to pass radiation without significant deviation or absorption. Note that a substance transparent to one radiation may be opaque to another. The divide between transparency and translucency is not well defined. Thus some people call a filter transparent (as it does not distort radiation): others would call it translucent (as it absorbs some of the radiation).
