Metallic asteroids: threat or benefit?
«Our results suggest a higher number of metallic objects in the Solar System than previously suspected» said Alan Harris from the DLR Institute of Planetary Research in Berlin. Thanks to the new infrared method will be possible to identify many other metal-rich asteroids. What surprised the scientists was that metallic asteroids emit less
NEOShield’s target object comes close to Earth
Figure 1: Plot of the orbits of all presently known Potentially Hazardous Asteroids (PHAs), i.e. over 1400 as of early 2013. PHAs are asteroids with a size of at least 140 m and with orbits passing the Earth orbit within 7.5 million kilometres. The Earth orbit
NASA’s Hubble Telescope Spots Mars-Bound Comet Sprout Multiple Jets