Did you miss the last planetary parade in June? The next planetary alignment is this weekend. Here's when to watch it ...

A study of comet motions indicates that the Solar System has a second alignment plane. Analytical investigation of the orbits of long-period comets shows that the aphelia of the comets, the point ...

The universe is getting ready to show us a rare, shadowless view of the deep unknown. Earth, the sun, and the mysterious interstellar visitor known as 3I/ATLAS will all line up almost perfectly on Jan ...

A newly discovered object orbiting far beyond Neptune has its closest approach to the Sun pointed in the opposite direction from every other known body like it, weakening one of the central ...