COPENHAGEN, Denmark (AP) — Finnish experts are scrambling to calculate the trajectory of a blazing fireball that lit up the dark skies of Arctic Finland for five seconds in an attempt to find the celestial body. Tomas Kohout of the University of Helsinki's physics department says Thursday night's fireball — allegedly a meteorite — "seems to have been one of the brightest ones." Kohout says the alleged meteorite produced a blast wave that felt like an explosion about 6:40 p.m.