Astronomers have discovered a new member of a rare and mysterious class of solar system objects known as sednoids - a subset of extreme trans-Neptunian objects (ETNOs) with exceptionally distant, ...

The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

A stronomers have discovered an incredibly rare non-planetary body lurking on the outer reaches of the Solar System, which ...

Typically, telescopes are synonymous with bringing far-off objects close, but the newest member of the solar system was ...