COSMIC MYSTERIES
The force keeping planets in orbit.
Gravity
Organ producing insulin.
Pancreas
Lightest element.
Hydrogen
The force causing galaxies to accelerate apart.
Dark Energy
Muscle separating chest and abdomen.
Diaphragm
Gas used in balloons.
Helium
The remnant of a massive star after a supernova.
Neutron Star
Largest organ of the body.
Skin
The most electronegative element.
Fluorine
The seventh planet from the Sun.
Uranus
The supercontinent that existed about 300 million years ago.
Pangea
The carbon cage molecule resembling a soccer ball.
Buckminster fullerene
The hypothetical boundary beyond which nothing escapes a black hole.
Event Horizon
Cells carrying oxygen.
Erythrocytes
The process of a solid becoming gas directly.
Sublimation