International Asteroid Day

International Asteroid Day History

International Asteroid Day is a global awareness campaign to promote the importance of asteroids and raise awareness about the potential threat they pose to Earth. It aims to educate people about asteroids and their impact on our planet, and encourages individuals and governments to take action by supporting the development of asteroid detection and defense technologies.

The observance also marks the anniversary of the Tunguska event. This was the most significant asteroid impact in recent history, which occurred on June 30th, 1908, in Siberia, Russia. The explosion from the impact leveled trees across 800 square miles and had an estimated energy equivalent to 15 megatons of TNT.

The United Kingdom has been actively participating in International Asteroid Day since its inception in 2015. Various events are organized across the country to raise awareness about asteroids and their impact on Earth. From keynote speeches to documentaries, workshops, and educational programs, these events seek to provide the public with information on what asteroids are, how they travel through space, and what steps are being taken to predict and prevent impact. International Asteroid Day is observed annually on June 30th.

Top 7 Facts for 2026 International Asteroid Day in the UK

• Dr Brian May, the world-renowned lead guitarist of the rock band Queen and an astrophysicist who graduated from Imperial College London, is a primary co-founder of the global movement to improve planetary defence.
• The initiative was originally inspired by the film 51 Degrees North, a creative work that explores the hypothetical consequences of a large asteroid striking the city of London.
• Astronomers frequently use the historical Tunguska Event to illustrate potential risks, noting that the 1908 explosion flattened a forest area in Siberia roughly equivalent in size to the region contained within the M25 motorway.
• A central pillar of the observance is the 100X Declaration, a campaign that calls for a hundred-fold increase in the speed at which scientists discover and track near-Earth objects.
• In 2017, the International Astronomical Union officially named a minor planet Asteroidday in recognition of the initiative's success in raising global awareness about cosmic hazards.
• The 2026 observance will serve as a major milestone for discussing the upcoming arrival of 99942 Apophis, a 340-metre-wide asteroid that will be visible to the naked eye in the night sky during its exceptionally close flyby in 2029.
• Scientific presentations often highlight the fact that the shockwaves from the 1908 Siberian impact were powerful enough to be detected by barographs as far away as the United Kingdom.

In the News and Trending in the UK for International Asteroid Day

Top things to do in the UK for International Asteroid Day

• Tune into the 2021 Asteroid Day program. The program will include interviews with different personnel, it will explore how technologies have changed, and it will explore what the future has in store for asteroid research.
• Stay informed about upcoming news and events. Asteroid Day periodically posts information about new asteroids that catch NASA's eye. They also feature virtual events or webinars with astronomers and scientists.
• Watch a documentary to learn more about asteroids in the United Kingdom. Here are our top picks:
  1. 51 Degrees North (2015) - A British sci-fi drama that follows a group of people in London as they await the impact of an approaching asteroid.
  2. Asteroid: Final Impact (2015) - A sci-fi disaster film about a deadly meteor storm and the race to save the Earth from a massive asteroid.
  3. Horizon: Killer Asteroids (2004) - An episode of the long-running BBC documentary series that delves into the potential threat of asteroid impacts and what can be done to prevent a possible disaster.
• Read a book to learn more about asterioids in the United Kingdom. Here are some recommendations:
  1. Near-Earth Objects: Finding Them Before They Find Us by Donald K. Yeomans
  2. Asteroid: Earth Destroyer or New Frontier? by Patricia Barnes-Svarney