The search for an unknown planet in our solar ... system planet, which they dubbed Planet Nine. Planet Nine is believed to be between five and 10 times the mass of Earth and would be orbiting the sun ...

There may be another world lurking between the orbital lines of our solar system. Astronomers in Japan have published their theory of an “Earth-like planet,” dubbed Planet Nine, that’s hiding in plain ...

Astronomers are abuzz with the discovery of a rogue planet, 2MASS J05325346+0919037, which is set to pass within 0.05 ...

The current understanding of the Kuiper Belt is that it extends from the orbit of Neptune at 30 astronomical units and is 50 astronomical units away from the Sun. One astronomical unit (AU) is the ...

In a new blog post, he suggested that interstellar object 3I/ATLAS, which is currently cruising through our solar system, could’ve sent off the signal back in 1977 — when it was still 600 times the ...

You might think we know the solar system pretty well, but there's a lot more to our cosmic neighborhood than initially meets the eye (or telescope). Most of the good stuff, such as the planets, moons ...

There may be more than meets the eye with The Kuiper Belt, a ring comprising thousands of large, icy objects and dwarf planets that encircle our solar system. A yet-to-be-published study, spotlighted ...

A mysterious space object named 2023 KQ14, nicknamed “Ammonite,” challenges theories about the mysterious and possible Planet ...

The European Space Agency (ESA) shared more data on the 3I/ATLAS interstellar comet after pointing to Mars orbiters at it.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Astronomers have ...

New telescopes will give breathtaking insight into what, or who, is visiting Earth's neighborhood. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works ...