A ninth planet the size of Neptune may be hidden in the far reaches of the solar system, but the evidence has left some experts skeptical.

They describe this idea in an opinion paper published in the ... colonizing Mars, another planet, or one of the nearby moons in the future, then people need to identify, understand, and send ...

A new paper released today documents the first soil ... and can help attract people into science—we need all the future ...

But astronomers may have found new evidence that points to a celestial body that could be a possible candidate as "Planet Nine," according to a new paper, which has been accepted for publication ...

Nikku Madhusudhan said about the discovery Michael Nied has been a digital news editor with PEOPLE since 2025 ... have discovered evidence of life on a planet 700 trillion miles away from Earth.

One part of this plan would require increasing the planet’s atmospheric pressure, and one scientist suggests that capturing celestial objects from the Kuiper Belt—which are full of the necessary light ...

More should be done to make an effort to mobilize people power to tackle the current generation of environmental crises.