Astronomers have announced the discovery of a monumental interstellar object, designated 3I/Atlas, believed to be the largest ...

A mysterious visitor from another solar system could be an alien spacecraft, according to a leading Harvard astronomer.

This is only the third time that a celestial body from outside the solar system has been discovered. Months remain for the ...

Astronomers have discovered an interstellar object travelling through the solar system that is expected to pass by Earth ...

The Founding Fathers who gathered in Philadelphia to adopt the Declaration of Independence on July 4, 1776 picked a nice day ...