Physics Uncovered on Instagram: "As Elon Musk explains, SpaceX’s Starship does not travel to Mars in a straight line. Instead, it follows a carefully calculated elliptical path around the Sun known as a Hohmann transfer orbit. This route takes advantage of gravity and momentum, allowing the spacecraft to reach Mars using the least amount of fuel possible. The ideal time to launch is during a Mars transfer window, when Earth and Mars align favorably in their orbits and are closest to each other.