Stuart Clark is the author of The Day Without Yesterday (Polygon). Find him on Twitter @DrStuClark. More from Across the Universe blog.

On the anniversary, Richters has released an interactive video of the Chelyabinsk event, which lets people re-watch the historic impact in real time from different perspectives.

Taking place on 30 June, 2015, Asteroid Awareness Day has now opened a playbook for people to propose events wherever they live. This world-wide endeavour will represent the global nature of the problem.

It showed the world how serious the threat from meteorites and asteroids can be. Late last year, a group of campaigners headed by Queen’s Brian May and film maker Grigorij Richters came together to propose Asteroid Awareness Day . The signatories on the campaign declaration include rock stars, astronauts and scientists from around the world. You will find my name signed on there too.

The lightshow turned dangerous when the fireball abruptly exploded, injuring more than 1200 people. Some were burnt by the heat but most were cut as the shock wave from the explosion violently smashed windows. The city sustained 1 billion roubles (£10m) worth of damage.

It happened at 9:20am local time. A fireball appeared from out of the crystal clear blue sky over the southern Ural region in Russia. Rapidly increasing in brightness, it blazed brighter than the Sun.

Two years ago, the Earth caught a glimpse of disaster in the form of a 12,000-tonne meteorite that exploded above the Russian city of Chelyabinsk.

The interview will appear in the next issue, on sale next week.

Featuring beautiful bespoke photography, Guitarist Presents: 100 Great Guitars is a stunning showcase of the coolest rock ’n’ roll machines ever made. It’s also a handy reference for six-string aficionados and a must-read for guitar lovers everywhere.

The Brian May Super guitar features in "100 Great Guitars. 2015 Edition” - located at No2 - although this is probably not a strict classification.

Win a Brian May Guitar! This Brian May guitar is faithful to the spirit of Brian's original 'Red Special', an instrument that has achieved iconic status and a unique place in rock history, and designed by Brian May himself. Retail value $2000.

USA & CANADA ONLY: Chance to win a Red Special guitar signed by Brian May - with Guitar Player magazine in association with publisher Hal Leonard (USA).