A Mythical Form of Space Propulsion Finally Gets a Real Test
Since the birth of the space age, the dream of catching a ride to another solar system has been hobbled by the โtyranny of the rocket equation,โ which sets hard limits on the speed and size of the spacecraft we sling into the cosmos. Even with todayโs most powerful rocket engines, scientists estimate it would take 50,000 years to reach our closest interstellar neighbor, Alpha Centauri. If humans ever hope to see an alien sunrise, transit times will have to drop significantly.