Space Facts

Explore the latest fascinating facts freshly added to our collection!

What Is the Solar Constant and why is it important?
Space
The solar constant is the total power radiated out into space by the Sun. Most of this radiatio... Read more
When Was the Last Time Humans Were on the Moon?
Space
Apollo 17 was the last manned mission to the moon touching down on December 11, 1972, at 7:54:57 pm ... Read more
What is the difference between a sea-level and vacuum-optimized rocket engine?
Space
The difference between a sea-level and vacuum-optimized rocket engine mainly comes down to how they ... Read more
When Was SpaceX's First Starship Flight?
Space
SpaceX's first Integrated Starship (Starship + Super Heavy Booster) flight took place on A... Read more
What is the closest habitable planet?
Space
Wolf 1061c, thought to be a super-Earth exoplanet is believed to be the closest habitable planet. ... Read more
How Cold Is Space?
Space
Space is incredibly cold. The average background temperature of space as measured by the NASA COBE s... Read more