A meteor traveling at thens of thousands of miles an hour triggered a loud boom and ground shaking that were felt across Massachusetts on Saturday afternoon. NASA confirmed a fireball, meaning a bright meteor, passed over the state at 2:06 p.m. at an estimated speed of 75,000 mph, releasing what it said was the equivalent of about 300 tons of TNT upon breakup. “It appears to have fragmented at an altitude of 40 miles above extreme northeast Massachusetts/southeast New Hampshire,” NASA said in a