Lava tubes are familiar on Earth. They form when the surface of a lava flow hardens while molten rock continues to drain beneath, leaving behind a hollow conduit. On the Moon and Mars, weaker gravity ...

Mercury is tiny, barely bigger than the Moon. Its metallic core makes up 70% of the planet’s mass, vastly exceeding Earth’s 32% and Mars ’ 25%. It’s unlikely that the core actually formed like this.

New research presented at the Europlanet Science Congress 2025 in Helsinki suggests that Venus may be concealing some of the largest lava-carved tunnels ever discovered in the solar system. The ...

Venus is officially a lonely planet. After losing contact with the Akatsuki spacecraft last year, Japan’s space agency (JAXA) has officially ended operations of the lone mission left in our ...

Venus is similar in size to Earth, but it stays far hotter because its thick atmosphere traps heat, as shown by NASA’s facts. That extreme heat has not erased the planet’s scars, which include ...

Something strange is moving through our solar system — and scientists are scrambling to figure out exactly what it is.

CAPRICORN (Dec. 22-Jan. 19). Numbers, followers, external measures all melt away against the truth: no one else has your voice. No one shows up with your presence. No one sees a vision quite like ...

Somewhere in the orbit of Venus, scientists believe a hidden population of asteroids is circling the Sun—nearly invisible to Earth-bound telescopes and possibly capable of striking our planet with ...

Saturn, the jewel of the solar system, has returned to the night sky. The ringed planet rises in the east just as the sun sets in the west. Regular readers will recognize that Saturn is near ...

See Zodiac signs and horoscopes on 09/27/25 for today’s birthday, celebrity profiles (Avril Lavigne) and Aquarius, Pisces, Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, ...

Zodiac signs and horoscopes for today’s birthday and Aquarius, Pisces, Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn.

The Keeble Observatory at Randolph-Macon College will open this fall for public viewing on Thursday evenings, 7:30-9:30 pm, weather permitting. You can follow activities on Instagram@keebleobservatory ...