China plans to hit an asteroid with a Mach 26 projectile in planet defence test
China’s first planetary defence mission appears to be far more ambitious than Nasa’s Double Asteroid Redirection Test (Dart),…
What is Quasi-Moon and why is it silently orbiting Earth?
Quasi-moon 2023 FW13 is very small and dark, so it reflects very little sunlight. Its orbit is unusual,…