The head of planetary defense at the European Space Agency discusses 2024 YR4, an asteroid with a small chance of striking ...

Firefly Aerospace 's moon-bound spacecraft has provided the closest thing to a reflecting pool in space, showing Earth as an ...

the oscillations lasted longer than they would on Earth. China, which previously planted flags on the Moon in 2013 and 2020, now has plans to deploy a flag that appears to “wave.” According to ...

These changes in appearance are the phases of the moon. As the moon orbits Earth, it cycles through eight distinct phases. The four primary phases of the moon (new moon, first quarter, full moon ...