However, it is the fainter Neptune moon, provisionally named S/2021 N1, that presents a unique challenge. With a size of approximately 14 kilometers and an orbit spanning almost 27 years ...

The brighter of the two Neptune moons is about 23 kilometers (about 14 miles) in size, and takes almost nine years to orbit the ice giant. The "faintest" moon takes around 27 years — the longest ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Alignments of five or more planets are rare—there will be two more featuring five or more planets this year, but after that ...

Each month (and under each full moon) a new special and limited edition is released, and for August, the new release from MoonSwatch is the Mission to Neptune. Announced on the Swatch Instagram ...

From January to March, the night sky will host a spectacular parade of planets featuring Venus, Mars, Jupiter, Saturn, Uranus ...