WASHINGTON (AP) — The fireball that streaked through the Michigan sky put on quite a show but as far as potentially killer space rocks, it was merely a flash in the pan.

There are much bigger asteroids careening through our solar system. Scientists who watch for them hope they spot them in time to get people out of the way if a truly dangerous one is heading straight to Earth.

So far, one isn’t coming.

Just as Tuesday’s meteor lit up the Michigan skies, about 30 scientists were gathered in California to discuss the biggest meteor hit in modern history — the 1908 explosion over Tunguska, Russia, that flattened 800 square miles (2,100 square kilometers) of forest.

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