SpaceX’s Starlink, Elon Musk’s low-orbit satellite service, has been essential to Ukraine’s operations in the war against Russia. But officials in Kyiv say that Moscow’s forces have been buying satellite internet terminals and using them on the front line in its war against Ukraine, raising questions about what Musk and SpaceX can do, if anything, to shut down the effort. WSJ explains what we know about how the satellite system works.0:00 Starlink and Ukraine0:42 How Starlink works2:05 How Starlink restricts service3:07 ChallengesNews ExplainersSome days the high-speed news cycle can bring more questions than answers. WSJ’s news explainers break down the day’s biggest stories into bite-size pieces to help you make sense of the news.