Those in the Seattle area were treated to a spectacle last night as what looked like meteors streaked through the night sky.

But it wasn't meteors or aliens they were watching; instead, it was debris from a SpaceX Falcon 9 rocket that had launched earlier this month.

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Jonathan McDowell, an astronomer at the Harvard-Smithsonian Center for Astrophysics, says the debris comes from a rocket from SpaceX's Starlink launch, which took place on March 4.

The rocket had reportedly failed to make a "deorbit burn" and reentered Earth's atmosphere after spending 22 days in orbit.

McDowell says this is actually a common occurrence, as this is the 14th piece of what he describes as "space junk with a mass over one tonne" to reenter this year.