Project Mercury was the first U.S. human spaceflight program.
Fact #1074
👍 0 · 👎 0
More Space Facts
The Moon slowly moves away from Earth by a few centimeters each year.
Fact #11 · Space
The observable universe is about 93 billion light‑years wide.
Fact #1750 · Space
Time moves slower in stronger gravitational fields.
Fact #1821 · Space
The universe has no center.
Fact #1699 · Space
The Milky Way and Andromeda galaxies are on a slow collision course.
Fact #1613 · Space
A day on Venus is longer than its year.
Fact #1684 · Space
Time moves slower in gravity.
Fact #1721 · Space
The surface of Venus is hidden beneath thick clouds.
Fact #1628 · Space
Want more facts?
We have over 11,491 facts across 16 categories.