The huge 1,600-mile (2,500-kilometer) wide expanse of the South Pole–Aitken Basin extends considerably onto the far side of ...
The object dubbed Earth's "second moon" is actually a quasi-satellite that's accompanied the planet since 1957 — not a true ...
Skygazers who look up at the moon tonight may be able to spot Saturn below it. Here's when and how to spot the conjunction.