1. The sun is about 150 million km away from the earth. A jumbo jet would take 17 years to fly there.
2. The temperature at the center of the sun - 15 million degree Celsius. This is still 5 times hotter than lava flowing out of a volcano.
3. More than 200 muscles go into action when we take step, but only 17 when we smile.
4. We lose about 50 hair every day.
5. The footprints of Astronauts who landed on the moon will last for millions of years. This because there is no wind or rain on the moon to disturb them.