@everydaysteminist: How do we know where a spacecraft is when it’s billions of miles from Earth? 🚀 Whether it’s Voyager, New Horizons or a mission heading to Mars, navigation in deep space is far more precise than you might think. Using NASA’s Deep Space Network, scientists can measure tiny changes in radio signals to work out a spacecraft’s distance, speed and position across the Solar System. The fact that we can accurately track something billions of miles away is one of the most impressive engineering achievements of the space age. #STEMTok #astrophysics #space