The speed of light is approximately 300,000 km/s. Express this number using scientific notation. The sun’s diameter is approximately 1,390,000 km. Write the diameter of the sun in scientific notation. The sun converts more than 4 million tons of matter to energy every second. Write 4 million tons using scientific notation. Some gas jets that shoot out of the sun’s chromosphere reach 16,000 km in height. What is their height in scientific notation?