The Closest Recorded Approach That Was Not an Impact
How asteroid 2020 VT4 grazed Earth upper atmosphere at just 370 kilometers altitude, closer than the International Space Station orbit.
Read Article →Science Blog & Research Notes
In-depth analysis of notable near-Earth encounters, fireball events, and meteorite history.
Chelyabinsk in Numbers: Breaking Down the 2013 Superbolide
An audit of kinetic energy, entry velocity, fragment recovery, and atmospheric physics from the February 15, 2013 Chelyabinsk meteor event.
Read Article →Why Apophis Was Removed from the Risk List
How radar observations at Goldstone and Green Bank ruled out any chance of asteroid 99942 Apophis hitting Earth for at least a century.
Read Article →The Ten Heaviest Meteorites and Where to See Them
A worldwide guide to the most massive single meteorite masses known to science, from Namibia to Greenland and Manhattan.
Read Article →How Many Meteorites Are Named Each Year?
Tracking the annual approval rate of new meteorites across desert collection expeditions and Antarctic ice fields.
Read Article →How to Read a Sentry Risk Table Without Panic
A practical guide to understanding impact probability denominators, the Torino Scale, and logarithmic Palermo numbers.
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