Only 370 people have been selected by NASA as astronauts, making it an extraordinarily small and elite group composed mostly ...

Lunar minerals generate the rust mineral hematite when bombarded with high-energy oxygen particles, simulations show.

Happy autumnal equinox! Now, you can finally say fall is here — yesterday was still summer. Today, the sun enters Libra, the ...

The phenomenon of a Full Moon arises when our planet, Earth, is precisely sandwiched between the Sun and the Moon. This ...

On the day of the 2025 autumnal equinox, the sun rises almost exactly due east and sets to the west. The months that follow ...

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

From cooler temps to fall foliage, there's plenty to be excited about for the start of fall — but what does the autumnal ...

Megastructures have big impacts on the world - namely the people around and the environment they affect. However, this one ...

Saturn will put on a show for professional and backyard astromers alike, and be the brightest and closest it has been to ...

A new moon is when the moon shares the same celestial longitude as the sun; the two bodies are said to be in conjunction.

Summer is officially over September 22, at 2:19 p.m. Time to hang up the surfboard, deflate the beach balls, stow the grill, put away the Hawaiian shirts, and have a good cry. Naturally you're angry.

Scientists detect a solid inner core on Mars for the first time, revealing a new chapter in planetary evolution.