Reinventing Morse: Build Your Own Telegraph Kit

Which fact about the Sun do you find most amazing?

• More than 1 million planet Earths would fit inside the Sun
• About every 11 years, the Sun reverses its magnetic polarity
• 100,000,000,000 tons of dynamite would have to be detonated every second to match the Sun's energy production
• The Sun contains 99.85% of the mass in the solar system