June 30 — the last day of June — coincides with several dates that at first glance have nothing in common: a scientific catastrophe from a century ago, a church feast of the apostles, and an official UN day. But if you look closer, all three speak of one thing: that some things arrive without warning.
The taiga took the blow instead of the city
On June 30, 1908, at 7:14 AM local time, a large fireball flew over the Yenisei basin from southeast to northwest. The flight ended in an explosion at a height of 7–10 km above an uninhabited taiga region. A powerful shock wave knocked down trees over an area of approximately 2,150 square kilometers.
The explosion's power is estimated at 10–20 megatons in TNT equivalent. For comparison: the atomic bomb dropped on Hiroshima had a power of approximately 15 kilotons — meaning the Tunguska explosion was hundreds of times more powerful. But the location turned out to be uninhabited. If a similar explosion had occurred over a modern megacity, the consequences could have been catastrophic: destruction of buildings, fires, thousands of injured, and an overwhelmed medical care system.
"Such events happen rarely, but they demonstrate that one missed asteroid can turn into a national or even international crisis."
NASA, analysis of undetected near-Earth objects
Why Brian May specifically — and what does the UN have to do with it
International Asteroid Day was not established by UN bureaucrats, but by a group of scientists, astronauts, and — yes — Queen guitarist Brian May, who is also a graduate astrophysicist. In 2016, the UN General Assembly officially supported the initiative. The goal is not to frighten, but to push governments to fund systems for early detection of dangerous objects.
NASA warns of thousands of undetected asteroids that could pose a threat to Earth. The Tunguska object had a diameter of approximately 60 meters — enough to wipe out a large city, but not large enough for observers at the time to notice it in advance. Modern telescopes handle this task better, but the catalog of small bodies remains incomplete.
The Council of the 12 Apostles: why the feast moved to June 30
The Council of the 12 Apostles is an ancient church feast where, in addition to the day when all twelve apostles are honored together, each of them has their own feast day in the calendar. The date of June 30 was chosen deliberately: on the eve, June 29, the Holy Church celebrates the feast of the holy chief apostles Peter and Paul.
From September 1, 2023, the Orthodox Church of Ukraine and the Ukrainian Greek Catholic Church switched to the new Julian church calendar, and now all non-movable feasts with fixed dates are celebrated 13 days earlier. For the faithful, this means that the Council of the Apostles is no longer July 13 by the old style — it is here, at the end of June, together with asteroids and summer.
- The 12 Apostles: Peter, Andrew, James son of Zebedee, John, Philip, Bartholomew, Matthew, Thomas, James son of Alphaeus, Thaddaeus, Simon the Zealot, Judas Iscariot (replaced by Matthias)
- The Tunguska object: still unknown exactly — asteroid or comet fragment
- Asteroid Day 2025: conducted under the slogan of supporting international coordination of planetary defense
117 years ago, an object the size of a five-story building wide as a city block exploded over the taiga and killed no one — because there were no people there. The question is not whether something similar will fall again: statistically — it will. The question is whether we will then have a few years of warning and a rocket with the right trajectory — or whether we will again rely on the hope that the taiga will turn out to be bigger than the city.
