A newly discovered comet, called C/2025 F2 (SWAN), may have disintegrated. But the remnants are still visible.

The Comet 1 airliner roared into the air— and into history—on 20,000 pounds of thrust from its four De Havilland Ghost jet engines. For the first time ever, a jet-propelled aircraft was ...

It was the world’s first jet airliner—sleek, fast, and revolutionary. But the de Havilland Comet's groundbreaking leap into the Jet Age came at a terrible cost. Discover how design flaws, overlooked ...

NASA's Perseverance rover on Mars has collected its 24th sample of Jezero Crater. The 'Comet Geyser' sample is "great for ...

The KAAN fighter completed its first flight in February 2024, reaching an altitude of 8,000 feet at 230 knots. It also ...