Astronauts cannot burp in space.
232
41% of the moon is not visible from earth at any time.
103
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
The earth rotates more slowly on its axis in March than in September.
145