How satellites, radar and drones are tracking meteorites and aiding Earth's asteroid defence
- Written by Hadrien Devillepoix, Researcher in Planetary Astronomy, Curtin University
NASAOn July 31 2013 a constellation of US defence satellites saw a streak of light over South Australia as a rock from outer space burned through Earth’s atmosphere on its way to crash into the ground below.
The impact created an explosion equivalent to about 220 tonnes of TNT. More than 1,500km away, in Tasmania, the bang was heard by...




