Learn how to view the upcoming April 2026 planetary parade, including Mercury, Mars, Saturn, and Neptune.

The chance to see four planets in the sky at the same time, and so close together, isn't terribly common. Gyuk says that ...

On April 18, Mercury, Mars, Saturn, and Neptune align in the sky, but it might be hard to Tennesseans to spot. Here is what ...

A newly-discovered planet named Enaiposha, GJ 1214 b, is unlike anything found in our own solar system, similar to a ...

A rare planetary alignment peaks April 20, with Mercury, Mars, and Saturn clustering at dawn. Here’s where travelers should ...

Astronomers at The University of New Mexico have published new research confirming three bodies orbiting the dynamic ...

For several days this month, Saturn, Mars, and Mercury appear just degrees apart before sunrise—close enough to watch their ...

How long do planetary nebulae last on average? What are some of the controlling factors? Doug KaupaCouncil Bluffs, Iowa To understand how long a planetary nebula remains visible, we first need to ...

Two Earth-sized planets orbiting TRAPPIST-1 are locked in permanent day and night, with heat differences suggesting they are ...

Astronomers have long been puzzled by a cosmic mystery: planets orbiting two stars—like Star Wars’ Tatooine—are surprisingly rare, even though they should be common. New research suggests the culprit ...

This weekend, a rare celestial occasion will feature a bright six-planet parade in a planetary alignment visible to stargazers. Mercury, Venus, Neptune, Saturn, Uranus and Jupiter will will appear to ...