  A new cosmological object in analogy with the concept of a wormhole in
general relativity is introduced. As wormholes connect two distant points
through a tunnel in spacetime, this new object connects two spacetime through a
large mouth which is referred to as a "Cosmic Gate". In this context, two
identical copies of the regular part of the de Sitter spacetime are cut through
a timelike hyperplane. Then, they are glued at their identical boundaries (the
only boundary) to form a complete spacetime. The stability of the cosmic gate
against a linear radial perturbation is studied as well. Finally, the radial
geodesics of the spacetime for a timelike and a null particle are presented.
