Mathematicians calculated where the planet might be based on its effects on Uranus, and astronomers searched for less than an hour before they found the Neptune. That was in 1846.

The most elusive planetary aurora in the Solar System has finally been revealed in all its gently glowing glory. Far from the Sun, and Earth, the sky-blue planet Neptune has been captured shimmering ...

When Neptune is positioned 180 degrees from the Sun's ecliptic longitude, meaning Neptune, Earth, and the Sun are nearly aligned in a straight line, this is referred to as Neptune's opposition. The ...

When Neptune is positioned 180 degrees from the Sun in ecliptic longitude, meaning that Neptune, Earth, and the Sun are aligned in a near-straight line, it is referred to as Neptune's opposition. The ...

What can sub-Neptunes, exoplanets whose sizes are between Earth and Neptune, and which are between the known for their water-rich compositions, teach astronomers about both where and how to find life ...

A new program has discovered chaos in a nearby planetary system, which could explain the existence of a phenomenon ...

Astronomers have discovered that many sub-Neptune exoplanets, once thought to host vast oceans, are far less watery than ...

An exoplanet orbiting a dwarf star 124 light-years from Earth made headlines around the world in April 2025. Researchers at ...