Asteroid lights up the sky over Siberia as it enters Earth’s atmosphere

A small asteroid was visible in northern Siberia on Tuesday as it closed in on its collision course with Earth. It's the first of two expected asteroid fly-bys this week. The European Space Agency issued an alert for the 27-inch asteroid early Tuesday morning, with the agency saying the celestial rock would create a visible fireball in the sky but that "the impact will be harmless." Video posted to social media on Tuesday shows the bright, fast-moving fireball darting through the sky before dissipating.