Possible new “Minimoon” discovered orbiting Earth (images)
It's been with us for three years, astronomers say but, sadly, it'll probably be gone by spring
Alien-life hunters are eyeing icy ocean moons Europa & Enceladus
The late 2030s are a realistic launch target for an alien-ocean explorer, should NASA choose to develop one
NASA mathematician Katherine Johnson has died aged 101
She was the real-life subject of Hidden Figures and helped Apollo 11 land on the Moon