10 Amazing Facts You Didn't Know About Astronomy

International Astronomy Day celebrated on 7 May every year. The day was started in 1973 by Doug Berger. 

International Astronomy Day is a way for astronomy enthusiasts and professionals to share their knowledge and love of outer space with the general public. 

Space is vast. With billions of galaxies and stars, and planets in our own solar system yet to be fully explored.

One million Earths could fit inside the sun.  Sun is considered an average-size star. 

The Sun accounts for 99.86% of the mass in our solar system with a mass of around 330,000 times that of Earth. 

Space is completely Silent. There is no atmosphere in space, which means that sound has no medium or way to travel to be heard. 

Venus is the hottest planet in the solar system and has an average surface temperature of around 450° C.  

There are about three trillion trees on Planet Earth, and between 100-400 billion stars, approximately, in the galaxy. 

The Sunset on Mars appears blue. Fine dust makes the blue near the Sun's part of the sky. 

Venus has a slow axis rotation which takes 243 Earth days to complete its day. A year on Venus 18 days less than a day on Venus. 

There’s a planet made of diamonds twice the size of earth The "super earth," also 55 Cancri e, is most likely covered in graphite and diamond.  

Scientists estimate the universe contains approximately 1,000,000,000,000,000,000,000,000 stars, or a septillion. 

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