Japanese astronomers have discovered a potential dwarf planet, nicknamed Ammonite, orbiting the Sun far beyond Neptune, challenging the existence of the theorized Planet Nine.

For reference, Pluto’s average distance from the Sun is about 40 AU, so 2023 KQ14 is quite distant. At 23.4 billion miles (37 ...

Astronomers discovered evidence for the earliest stages of planet formation forming around a baby sun-like star, providing a ...

Astronomers have discovered the earliest seeds of rocky planets forming providing a precious peek into the dawn of our own ...

Astronomers have observed the earliest stage of planet formation around a distant young star - for the first time ever. The ...

"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today." ...

Depending on how you look at it, UC Irvine doctoral candidate Te Han and his adviser, Paul Robertson, just made an already unimaginably difficult job – finding and observing planets ...

The observations offer a unique glimpse into the inner workings of an emerging planetary system, said the University of ...

CAPE CANAVERAL, Fla. — Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby ...

In a cosmic first, scientists identified signs of early planet formation by looking deep into the gas disk around a baby star far outside our solar system. View on euronews ...

Artist's impression of Planet Nine – a suspected “wide-orbit” planet – with the Sun in the distance; Neptune's orbit is shown as a small ellipse around the Sun. Imagine a giant planet drifting far ...

This artist’s concept depicts one of the solar system’s inner planets slamming into Earth after being nudged on a collision course by a passing star. Such a world-shattering cataclysm is ...