COLLIDING SATELLITES: Experts are calling it an "unprecedented event." Two satellites have collided in Earth orbit. Iridium 33 crashed into Kosmos 2251 on Tuesday, Feb. 10th, approximately 800 km over northern Siberia. Click on the image to launch a 2.3 MB animation of the collision:


https://spaceweather.com/
Both satellites were completely destroyed. The expanding cloud of debris contains more than 500 fragments, substantially increasing the debris population at altitudes near 800 km. According to NASA, the International Space Station orbiting 350 km above Earth is in no immediate danger from the much higher-altitude debris.

The US Air Force Space Surveillance Radar in Texas reportedly detected echoes from the debris cloud when it passed over the facility on Feb. 11th. Spaceweather.com is streaming live audio from the radar, and it might be possible to hear echoes the next time the cloud passes overhead. Try listening on Thursday, Feb. 12th, between 4:14 pm and 4:24 pm CST (2214 - 2224 UT). That's when Kosmos 2251 would have passed over the radar intact had the satellite not been shattered. More listening opportunities will be posted when the location of the debris is better known.
https://spaceweather.com/