He also adds: «The tidal effect on an asteroid, which rapidly rotates under the gravitational field of a planet, can
fragment these objects or
release large rocks from its surface, which could then become
such dangerous projectiles at a local scale as the one fell in Cheliábinsk (Russia) on February 15th 2013.»
«By
releasing the material chemically from the tartar, you can identify
fragments such as wheat and chaff, or pieces of meat,» he said.