Important information about solar system and earth . GK notes

Important information about solar system and earth 

• Earth is a blue planet. - this is firstly said by YURI GAGARIN, and he was surprised to see this. he saw the earth planet from outside  during his SOVIET Mission Vostok .
• Rotation speed of the earth  is at the equator is 1,016 miles per hour or 1,665 km/h
• Do you know we always see the one side of the moon because of moons rotation so earth also rotate so we can not see the other side of the moon 
• The first images of the other side of the moon was obtained  in 1959 .the photographs send by Luna3 
• The greatest shower of falling stars is occurred on 27 December 1872 , this happen because passed through the tail of broken-up comet Biela .
• To make the possible for astronauts to stay in space American Space Station put first Skylab in orbit in 1973.
• Roman called the Sun as Sol, while the Greeks named it Helios. 
• The Sun is modest star located in a center of  our Galaxy , still we depend on it to live , and because it is so close , we know about it batter than other stars .
• Pluto was the ninth planet of the solar system but in 2006 it is considered a Dwarf .
• in 2012 - DOOMSDAY - Predictions had been made as early as the MAYANS , that the world will end in the year 2012 . claims had been made that a fictitious planet, Nibiru, would collide with Earth . but it was totally fake .