International Asteroid Day (IAD) is celebrated every year on 30 June around the world to raise public awareness about the asteroid impact hazard.
International Asteroid Day (IAD) also aims to inform the public about the crisis communication actions to be taken at the global level in case of a credible near-Earth object threat.
International Asteroid Day (IAD) on 30 June was declared in the year 2016, by the United Nations General Assembly (UNGA) adopting a resolution A/RES/71/90.
This year in 2019, it celebrates the fifth anniversary of International Asteroid Day.
International Asteroid Day (IAD) was kept held on the anniversary of the Siberian Tunguska event that took place on 30th June 1908, the most harmful known asteroid-related event on Earth in recent history.
Tunguska event. On this day a large explosion occurred in the sky over the Podkamennaya Tunguska River in Siberia, Russia. It destroyed about 2,000 square kilometers (770 square miles) of the forest in the area, flattening about 80 million trees.
Asteroids are rocky leftovers from the formation of the solar system 4.6 billion years ago. They revolve around the Sun and are sometimes called planetoids or minor planets.
Asteroids are mainly composed of minerals and rocks.