The Swift Observatory was launched in 2004 and was only planned to work for two years. But 20 years later, this space telescope is still helping scientists study gamma-ray bursts, which are powerful energy explosions that occur when stars die or collide. These explosions help scientists learn about the history of the universe. NASA has launched a rescue mission to save the Swift Observatory, which will use a robotic spacecraft called LINK to boost the observatory to a higher orbit. The mission is risky and costs $30 million, but if successful, the Swift Observatory can continue its important work for at least five more years.