In 2006, the International Astronomical Union reclassified Pluto as a dwarf planet.
This is because Pluto does not gravitationally dominate the neighborhood around its orbit
2019
pens won’t work in space.
Normal pens work by gravity pulling the ink towards the pen’s nib. As there’s no gravity in space, the ink doesn’t get pulled to the nib.
2020
A large percentage of asteroids are pulled in by Jupiter’s gravity.
Many of the asteroids that are potentially harmful to Earth, the long period comets, tend to be sucked into Jupiter’s gravity field
2016
Astronauts can’t burp in space.
The lack of gravity in space means the air in astronaut’s stomach doesn’t separate and rise up from ingested food.
2018
Astronauts can grow approximately 5 cm in height when in space.
The lack of gravity in space causes the discs between the vertebrae to expand a little.
2013
