Outer space is full of mysteries. Think about it: According to NASA, there could be as many as 100 billion solar systems in the Milky Way, and hundreds of billions of other galaxies in the universe.

MIAMI — A Halloween costume that depicts a space creature in orange prison garb emblazoned with the words “illegal alien” is reigniting debate over a long-used term based on the U.S. government’s ...

This Halloween, you plan on having a costume that is truly out of this world. No, seriously — you plan on going as an alien. Since we have yet to discover any otherworldly neighbors, this is the ...