When viewed from Earth, Sirius is the brightest star in the night sky.
On a clear night in the Northern Hemisphere the naked eye can discern some 5,000 stars.
The Sun produces more energy every minute than all the energy used on Earth in a whole year.
Only 55% of all Americans know that the sun is a star.
The temperature on the Moon reaches 243 degrees Fahrenheit at midday on the lunar equator. During the night, the temperature falls to -261 degrees Fahrenheit.