| http://www.w3.org/ns/prov#value | - The team predicts the system will offer a one-week warning for a 50-yard (45-metre) diameter asteroid known as a ???city killer??? and three weeks for a 150 yard (137 metre)-diameter ???county killer.??? ???he is enough time to evacuate the area of people, take measures to protect buildings and other infrastructure, and be alert to a tsunami danger generated by ocean impacts,??? said astronomer J
|
