Space Rocks Near Earth

On Aug. 17 an asteroid estimated to be 17 to 39 meters in diameter will pass through space intersecting the Earth’s orbit, missing a collision by only about one million miles. The object will be moving at about 13,533 miles per hour, or 3.76 miles per second.


Dear EarthTalk: I heard of a practice called cyanide fishing, which is used mostly to collect aquarium specimens, but I understand it is also used to catch fish we eat. Isn’t this very unhealthy? — Phil Seymour, Albany, NY