- You can't cry on space because your tears won't ever fall.
- According to astronauts, space smells like seared steak, hot metal and welding fumes.
- In 1962, the U.S. blew up a hydrogen bomb in space that was 100 times more powerful than Hiroshima.
- In 1977, we received a signal from deep space that lasted 72 seconds. We still don't know how or where it came from.
- The International Space Station is as roomy as a five-bedroom house and travels at 17,500 mph.
- Most astronauts become two inches taller in space.
- Inside an astronaut's helmet, there is a velcro patch that serves as a scratcher.
- NASA is developing 3D printed pizzas for astronauts.
- NASA scientists have discovered stars that are
cool enough to touch.
- The International Space Station is about the size of a football field.
- Humans can live unprotected in space for about 30 seconds if they don't hold their breath.
- The first man-made object in space was the German V2 rocket.
- It is impossible to whistle in a Spacesuit.
- Astronauts on the International Space Station exercise about 2 hours per day.
- Sex is banned aboard the ISS (International Space Station).
- In 1963, a cat called "Felicette" became the first feline in space.
- An astronaut threw a boomerang while visiting the International Space Station and it returned to him, even in the absence of gravity.
- Laika, the first dog in space, did not die peacefully as initially reported by the Soviets. She died because the cabin overheated.
- Astronauts in space can't tell if their bladders are full. They are trained to relieve themselves every two hours.
- NASA engineers asked Sally Ride, the first American woman in space, if 100 tampons was the right number for her 7-day trip to space.
- American astronauts have been able to vote in elections from space since 1997.
- Astronauts aboard the ISS change clothes near a filter that sucks up the skin particles that would otherwise float around.
- Outer space begins at 100 kilometers (62 mi) above sea level.
- In 2015, Astronaut Chris Hadfield released the first album of songs recorded entirely in space.
- It costs 41 cents per year per American citizen for NASA's entire Curiosity program.
- While floating in lunar orbit, astronaut Al Worden was 2,235 miles (3,600 km) away from his companions, making him the most isolated human being ever.
- In 1973, the crew of Skylab 4 staged the first strike in space. They requested time off to "look out the window and think."
- There's no "zero gravity" in space. Astronauts are in a constant state of free fall, which is why they appear to float.
- Valentina Tereshkova, the first woman in space, orbited Earth 48 times aboard Vostok 6 on June 16, 1963.
- Astronauts often lose their fingernails after conducting spacewalks.
- Elementary school students in Virginia built a satellite that was later deployed into space by NASA in 2016.
- The longest spacewalk ever lasted almost 9 hours.
- It's impossible
- The only survivors of the 2003 Columbia space shuttle disaster were some parasitic worms called nematodes.
- It's not strictly true that no sound vibrations can travel through space at all, but humans would not be able to hear any sounds in space.
- When astronauts spend long periods of time at zero gravity in space, their hearts become more spherical and lose muscle mass.
- If you could see as well as the Camera on the Hubble Space Telescope, you would be able to read the fine print on a newspaper 1 mile away.
- Dung beetles use the Milky Way to navigate.
- NASA has discovered over 3,200 planets, all confirmed with 99% certainty.
- Astronaut John Glenn became the oldest person in space at 77 after lobbying NASA for 2 years to fly "as a human guinea pig for geriatrics."
- NASA astronauts can vote from space.
- Neil Armstrong's boots are still floating around in space.
- Klingon was the chosen language for the Welsh government in its response to queries about UFO sightings at Cardiff Airport.
- The United Nations is planning to launch its first space mission in 2021.
- The Kepler 11145123 star, discovered in 2016, is so perfectly spherical that it's the roundest natural object ever measured.
- Long-term stays in space reveal issues with bone and muscle loss in low gravity, immune system suppression, and radiation exposure.