It has been suggested that lava tubes - underground tunnels carved out by molten rock - might be on Venus, and now we have ...

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 ...

Researchers are discussing 2025 PN7, a small celestial body that's following a similar orbital path to our planet's without being gravitationally tied to Earth ...

The sun’s debut in Libra on Sept. 22 marks the beginning of fall in the northern hemisphere, highlighting themes of balance ...

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 equinox actually mean?

September's new moon occurs on Sept. 21 and will partially eclipse the sun for skywatchers in the southern Pacific Ocean and ...

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

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.