There are currently no other explanations for the effects that we see, nor for the myriad other P9-induced effects we see on ...

Pluto reaches opposition and is ready for those who want to chase it down. Use the biggest scope you've got, or take aim with ...

NASA's New Horizons spacecraft made history by flying past Pluto, sending back groundbreaking data that would change our ...

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

In 2006, NASA launched New Horizons to explore Pluto. In 2019, it visited the furthest object in the Solar System we have ...

Trans-Neptunian objects (TNO) are some of our solar system's lesser-known objects. They number in the thousands, and they get their name from their orbits. These dwarf planets orbit the sun at a ...

At the far reaches of our Solar System lies Pluto, a mysterious world shrouded in shadows and icy terrain. NASA’s latest photos from this distant dwarf planet have provided us with ...

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, speeding through our celestial neighborhood.

A rare celestial visitor from beyond our solar system is here now It's cutting through the solar system at over 200,000 mph.

The new interstellar comet's official name is 3I/ATLAS. It's officially the third known interstellar object to pass through our solar system, and it poses no threat to Earth.

An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed.

An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed. The object -- likely a comet -- was first detected in data collected between by ...