If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

Astronomers have detected a promising sign of a ninth planet lurking at the the farthest reaches of the Solar System.

Astronomers using the James Webb Space Telescope have directly detected the faint glow of a planet that’s colder than any ...

In 2020, astronomers detected WD 1856+534 b, a gas giant that orbits a star 81 light-years from Earth. This exoplanet, which ...

"It's like trying to spot a fish by looking for ripples in a pond, rather than trying to see the fish itself." ...

Robert Lee Hotz covered new research and its impact on society for The Wall Street Journal.

Jupiter is our solar system's largest planet. The two brown dwarfs are gravitationally bound ... The planet, named 2M1510 (AB ...

NEW YORK — A new Tatooine-like planet outside the solar system may orbit two failed stars ... A light year is nearly 6 trillion miles. The brown dwarf pair was first spotted years ago.