World Asteroid Day 2021: It is also known as International Asteroid Day. The day is a way for the public to understand asteroids, and to educate people about the risks and opportunities of asteroids. This can be done by hosting events, providing educational resources, and communicating with the global audience on multiple digital platforms. World Asteroid Day marks the anniversary of the 1908 Tunguska impact. It also raises awareness about the role of asteroids in the formation of our universe, how their resources can be used in the future, how asteroids provide the way for future exploration, and also how we can protect our planet from the impacts of asteroids. The day is a global movement to protect our Earth from the impacts of Asteroids. Several events are organised all over the world to educate people about asteroids. What are Asteroids? Asteroids are the small rocky body that orbits around the sun. Mostly, they are found between the orbits of Mars and Jupiter but some have more eccentric orbits. So, we can say that asteroids are rocky-metallic objects which range in size from about the size of pebbles to around 600 miles across. They are so small that they are not considered planets but they orbit Sun. They are also known as the leftover material of the Solar System. Do you know that several hundred thousand asteroids are known to exist in our Solar System and many are yet to be discovered? Some asteroids are so small that they are difficult to detect. What is the difference between Asteroid, Meteor, Meteorite, and Meteoroid? World Asteroid Day: History In December 2016, the United Nations General Assembly adopted a resolution A/RES/71/90 and declared 30 June as International Asteroid Day to observe annually the anniversary of the Tunguska impact over Siberia, Russian Federation (30 June, 1908) at an international level to raise awareness about the hazardous impact of Asteroids. Let us tell you that the General Assembly's decision was made on the basis of a proposal made by the Association of Space Explorers, which was endorsed by the Committee on the Peaceful Uses of Outer Space (COPUOS). Asteroid Day was co-founded by astrophysicist and lead guitarist of QUEEN Dr. Brian May together with Danica Remy, President of B612 Foundation, Rusty Schweickart, Apollo 9 Astronaut, and filmmaker Grig Richters, to promote awareness and provide knowledge to the general public about the importance of asteroids in the formation of our universe and the role they play in our solar system today. There is an organisation named B612 that works towards protecting the Earth from asteroid impacts, informing and forwarding worldwide decision-making on planetary defense issues.