How much of the solar system's mass is in the Sun?
The Sun contains about 99.8% of all the mass in our solar system.
- Home
- How long does sunlight take to reach Earth?
“Sunlight takes about 8 minutes and 20 seconds to reach Earth, so we always see the Sun as it was a few minutes ago.”
Reference: NASA
More from this shelf
What is the altitude of the sun relative to Earth ?
The altitude of the sun varies throughout the year. On December 21st (sometimes the 22nd) the sun is 20 degrees above the horizon, it's lowest point of the year. On June 21st (sometimes the 20th) the sun is 65 degrees above the horizon, it's highest point of the year.
Do you know what days these are? They are the winter & summer solstice.
Facts about the electric utility industry
Since the first power plant (thomas edison's power plant) lit up 800 light bulbs in 1882, the electric utility industry has grown to generate over 2.5 million gigawatt-hours annually, the equivalent of lighting 4.8 billion 60-watt light bulbs for a year