Astronomers used a telescope in Hawaii to find a new object on the outer edges of our solar system, helping to fuel evidence of a long-standing theory about Planet Nine, or Planet X.

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

Researchers using the Subaru Telescope, located in Hawaii, spotted a small, distant object far beyond Pluto and have named it 2023 KQ14.

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 ...

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

NASA launched New Horizons to explore Pluto. In 2019, it visited the furthest object in the Solar System we have seen up close.

A young sunlike star called HOPS 315 seems to host a swirling disk of gas giving rise to minerals that kick-start the planet formation process.

Trans-Neptunian objects (TNO) are some of our solar system's lesser-known objects. They number in the thousands, and they get ...

The Subaru Telescope has made an exciting discovery: a small body beyond Pluto, with implications for the formation, evolution, and current structure of the outer solar system.

Because Pluto is so dim, you need a telescope to see it. “A backyard telescope could do it under the right conditions,” says ...

In a world where entrepreneurship is as much about instinct as it is about innovation, some zodiac signs seem cosmically ...

Scientists are almost sure that there is a ninth planet. But a study by Japanese astronomers hints that this might not be true. A new cosmic body called a sednoid has been discovered near the Kuiper ...