The morning of April 24 will give rise to a striking mini-planetary parade, as Mercury, Venus, Saturn, Neptune, and Earth's ...

"Neptune was the missing piece of the puzzle when it came to detecting auroras on the giant planets," said the European Space Agency.

Astronomers have long suspected that an enormous, unseen planet is hiding somewhere far beyond Neptune, quietly shaping the orbits of icy objects at the edge of our solar system. Now, a new generation ...

Mike Brown is convinced that beyond Neptune, at the far reaches of our solar system, there's an unseen giant planet. "This is ...

Scientists have studied auroras on Saturn and Jupiter for decades, but Neptune, the farthest planet from the sun, has been harder to see up close. “Neptune has always been elusive," said ...

Mike Brown is convinced that beyond Neptune, at the far reaches of our solar system, there's an unseen giant planet ... Rubin Observatory, a joint project of the National Science Foundation ...