Gravity
Definition 1 of 3
Pro Tip 1/3
Universal Force
Gravity affects everything with mass, everywhere, not just on Earth, but also in space. Astronauts experience less gravity, which is why they float.
Pro Tip 2/3
Isaac Newton
Gravity was first described by Newton; his apple story helps remember it's about attraction. Newton's laws of motion and gravity revolutionized science.
Pro Tip 3/3
Natural Phenomenon
Understanding gravity helps comprehend how planets orbit the sun and why we stay grounded. Without gravity, we would fly off into space.