Planet Nine

Exotic Objects, Planets

Ask Astro: Does Planet Nine have enough mass to be a black hole?

Exoplanets, Planets, Robotic Spaceflight, Solar System

Ask Astro: Can New Horizons help us find Planet Nine?

Exoplanets, Planets

Far-flung exoplanet resembles long-sought Planet Nine

Exoplanets, Exotic Objects, Planets

Is Planet Nine a black hole or a planet? Harvard scientists suggest a way to find out.

Exoplanets, Planets, Solar System

Astronomers find 139 new minor planets in the outer solar system

Exoplanets, Exotic Objects, Planets, Solar System

Planet Nine may be a black hole the size of a baseball

Exoplanets, Planets

A map to Planet Nine: Charting the solar system’s most distant worlds

Exoplanets, Planets

Could the hypothetical Planet Nine have altered Neptune’s orbit?

Exoplanets, Milky Way, Planets, Robotic Spaceflight, Solar System

Saturn spacecraft not affected by hypothetical planet 9