Astrology
This water sign is known for its emotional depth and intuition.
Pisces
This is a massive explosion that marks the end of a star's life.
Supernova
This was the first artificial satellite to orbit Earth.
Sputnik
These two signs are ruled by Mercury.
Gemini and Virgo
This planet's atmosphere is about 90% hydrogen and 10% helium.
Jupiter
These are the first humans to walk on the Moon.
(Both names)
Neil Armstrong and Buzz Aldrin
This sign is symbolized by the scales and is associated with balance and harmony.
Libra
This is the hottest type of star.
O-type or blue
This is the name of the closest Galaxy to our Milky Way
Andromeda Galaxy
This fire sign is known for its optimism and adventurous spirit.
Sagittarius
This is the name of the theory that explains the formation of our solar system.
The Nebular Hypothesis
This planet has a unique tilt that causes it to rotate on its side.
Uranus