Astrophysics

What you'll learn

1. 1

   Imagine holding a heavy ball and a light feather — if you drop them in a vacuum (no air), they fall at exactly the same speed! 🪶

2. 2

   In a vacuum, which falls faster: a heavy ball or a feather?

3. 3

   Here's a star being born from a giant cloud of gas and dust — gravity pulls it all together! 🌟

4. 4

   Let's work out how much gravity pulls on a 5 kg rock near Earth's surface.

5. 5

   Drag the slider to see what happens to gravity as you move a space probe farther from Earth.

6. 6

   What is the main force that pulls gas together to form a star?

7. 7

   That's the big idea — gravity rules the universe. From planets orbiting the Sun to galaxies spinning together, it's all gravity! 🌌