Apollo 11 was the spaceflight that landed the first humans on the Moon,
Americans Neil Armstrong and Buzz Aldrin, on July 20, 1969, at 20:18 UTC.
Armstrong became the first to step onto the lunar surface six hours later,
on July 21 at 02:56 UTC.
Update: Curiosity landed safely on Mars at 05:14 UTC on August 6, 2012.
The first photo sent by the rover showing its shadow on the surface of Mars.
We all know what that means, there will be six more weeks of Martian Winter.
Time: A Law of Nature that prevents everything from happening at once.
Coordinated Universal Time (UTC)
Rare DX on HF: This is when some Amateur Radio Operators attempt to defy this Law.
Links below are for those that want to think outside the box
or even outside the hecatonicosachoron.