Pluto's unusual eccentricity and tilt is likely due to its interactions with neighboring Neptune and other giant planets, ...

The arrival of mini moon could draw the attention of private companies and agencies focused on asteroid mining ...

Dwarf planet 2023 KQ14, Ammonite, has a stable orbit that challenges the hypothesis of the mysterious Planet Nine.

During a total solar eclipse, the bright disk of the Sun is blocked, and the faint outer atmosphere becomes visible. It is ...

The final eclipse of 2025 will unfold this weekend, but despite some of the hype online, most of the world will miss the ...

Three missions aimed at observing space weather are set to launch Sept. 23 from Florida. Here's what to know about NASA's ...

This weekend's September new moon will rise amid a partial solar eclipse, giving way to the autumnal equinox. Here's when, ...

Astronomers are racing to study 3I/ATLAS, an interstellar comet whose strange behavior reveals new clues about how other ...

Earth is the only planet in our solar system with a single moon, making it a rare phenomenon for a planet of its kind.

The Earth stands alone in the solar system as a habitable world, as far as we know. But that doesn’t mean we don’t get visitors, most often in the form of (usually harmless) asteroids. Some even ...

The official number of exoplanets—planets outside our solar system—tracked by NASA has reached 6,000. Confirmed planets are ...

The Mainichi Shimbun answers some common questions readers may have about the mechanisms behind lunar and solar eclipses, as ...