A scientific satellite needs only 250 watts of power, the equivalent used by two hour light bulbs, to operate.
Amazing fact: Stars
There are between 100,000,000,000 and 1,000,000,000,000 stars in a normal galaxy.
Amazing fact: Humming bird
The only bird that can fly backwards is the hummingbird, which achieves this feat by beating its wings up and down at a very fast speed; some species reach 80 beats per second.
Amazing fact: Astatine
Only 28 grams of the rarest substance on Earth exist. What's the rarest substance on Earth? Astatine.
Amazing fact: laser
The most powerful laser is the BELLA which generates a quadrillion watts, with a duration of 40 femtoseconds (0.00000000000004 seconds).
