A primary body – also called a central body, host body, gravitational primary, or simply primary – is the main physical body of a gravitationally bound...

is the farthest or nearest point in the orbit of a planetary body about its primary body. The line of apsides is the line connecting the two extreme values...

orbiting body is any physical body that orbits a more massive one, called the primary body. The orbiting body is properly referred to as the secondary body (...

speed needed for an object to escape from contact with or orbit of a primary body, assuming: Ballistic trajectory - no other forces are acting on the object...

case of the circular restricted three-body problem, these solutions, viewed in a frame rotating with the primaries, become points called Lagrangian points...

Gastrulation occurs in reference to the primary body axis. Germ layer formation is linked to the primary body axis as well, however it is less reliant...

The Interceptor multi-threat body armor system (IBA) is a bullet-resistant body armor system that was used by the United States Armed Forces during the...

bilaterians lack body cavities (acoelomates, i.e. Platyhelminthes, Gastrotricha and Gnathostomulida), while others display primary body cavities (deriving...

The human body is the entire structure of a human being. It is composed of many different types of cells that together create tissues and subsequently...

Body art is art in which the artist uses their human body as the primary medium. Emerging from the context of Conceptual Art during the 1970s, Body art...