Ninety-one years ago today, the world’s first liquid-fueled rocket was launched, in Auburn, Massachusetts. The man who launched it was its inventor - Robert Goddard. Rockets had been around for a long time – the Chinese were using them eight hundred years ago. But all rockets up to March 16, 1926, were solid-fuel, using a kind of gunpowder as the propellant. The problem with those rockets was that once ignited, the rocket fuel continued to burn until it was used up – no off switch. With liquid fuel it was possible to start, stop, restart, throttle the engine up or down - in other words, liquid-fueled rockets were easier to control, and safer too. The folks in Massachusetts didn’t seem to appreciate this however, and he was branded a nuisance. And the New York Times back then said he was wrong, that rockets wouldn’t work in space. Evidently they were mistaken, because, thanks to Robert Goddard, we’ve sent rockets outward to the moon, to the planets, to the stars.