Space travel gives astronauts a feeling of being completely engulfed by a profound sense of universal connectedness. Edgar Mitchell described what it’s like to stand on the moon and look at the Earth: “You develop an instant global consciousness, a people orientation, an intense dissatisfaction with the state of the world, and a compulsion to do something about it. From out there on the moon, international politics look so petty. You want to grab a politician by the scruff of the neck and drag him a quarter of a million miles out and say, ‘Look at that, you son of a bitch.’ ”
When astronauts return from space they are usually ~ 2 inches taller. This is due to the low gravity in space that allows for the vertebrae in the spine to spread apart.
Our Milky Way galaxy will collide with the neighboring Andromeda galaxy in 4 billion years.
Contrary to depictions in science fiction, the human body can briefly survive in outer space unprotected, and that the human skin doubles in size, more resembling a body builder than a balloon.
Neptune was predicted to exist by mathematical calculations well before it was physically observed by telescopes.
There is a manmade satellite orbiting Earth, that is expected to come back down in 8.4 million years, carrying maps of today’s Earth for future residents of Earth
The deepest note mankind has ever detected is a B♭ that is 57 octaves below middle C. The sound is made by inflating plasma bubbles in the center of the Perseus Cluster.
The loudest events in the universe are starquakes. The largest ever recorded was in 2004, the star Magnatar SGR 1806-20 adjusted itself with the force equal to 22.7 on the Richter scale. It happened 50,000 ly away from Earth, but if it was 10 ly away, it would have caused mass extinction.
NASA cannot bring birds into space because birds need gravity to swallow.