The third known visitor from another star system, Comet 3I/ATLAS, has been racing through the Solar System with just enough ...

Pluribus imagines Kepler-22b as an ocean world that sends a gift to humanity through radio waves. In real life, no such ...

When a thunderstorm recently lit up the night sky, cameras captured towering red shapes that looked uncannily like glowing jellyfish hanging above the clouds. The images raced across social media, and ...

Mars. From forming black holes to phantom dark energy, discover the cosmic mysteries astronomers uncovered last year.

On Friday, December 19, 2025, comet 3I/ATLAS will make its closest approach to Earth. 3I/ATLAS can be found near the constellation Leo when it reaches its closest distance to Earth, overnight on ...

On Dec. 18, just 24 hours before its closest approach, the Green Bank Telescope scanned frequencies from 1 to 12 GHz. Their ...

Interstellar object 3I/ATLAS has grown a colossal, sunward anti-tail larger than the distance to the moon. Is this an unprecedented comet, or is Harvard's Avi Loeb right about a technological origin?

On Dec. 19, 3I/ATLAS will be about 1.8 astronomical units away (170 million miles), almost twice as far as the average distance between Earth and the Sun (1AU orr about 93 million miles), according to ...

The Miller Point overlook offers perhaps the most comprehensive view of the park’s dramatic landscape. From this elevated vantage point, you can see the full expanse of the gorge, with its countless ...

From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

A dedicated scan for signs of radio-transmitting technology in interstellar comet 3I/ATLAS has come back with absolute ...

Scientists have discovered 26 new bacterial species that survived the extreme sterilization protocols of NASA cleanrooms ...