history.nasa.gov

W7Vyd TIL Every second the Sun becomes lighter by 4 million tons. A mass equal to Earth's burns up in 50,000 years. However, even with such extravagance, the Sun will fade out in at least 5 billion years.
X0ODD TIL NASA maintains a catalog of all human-made items left behind on the Moon's surface, including cameras, science experiments, golf balls, and a javelin
R76ml TIL space shuttles' main engines burn cryogenic propellant at ~3500K (hot enough to boil iron). They are fueled by cooling channels built-in to the nozzles themselves, which simultaneously cool the nozzle at a steady state while fueling the engine.