International Asteroid Day is celebrated globally on June 30 every year. The objective of International Asteroid Day is to raise public awareness about the threat of asteroid impact and to reach out to the public about the crisis communication actions to be carried out globally in case of the threat of a reliable near-Earth object.
International Asteroid Day: In December 2016, the United Nations General Assembly has adopted Resolution A/RES/71/90 declaring 30 June as International Asteroid Day, so that 30 June 1908 should be celebrated internationally each year to commemorate the anniversary of the Tunguska impact on Siberia, the Russian Federation and to raise public awareness about the asteroid impact threat.
What is an asteroid?: Let's say that asteroids are tiny rocky bodies that appear to be orbiting around the Sun. Mostly, they are found between the orbits of Mars and Jupiter but appear in more singular orbits in some. So, we would say that asteroids are rocky-metal objects, ranging in size from the dimensions of pebbles to about 600 miles. They are so small that they are not considered planets but they orbit the sun. They are also identified as remaining matter of the solar system.