Moons orbit their parent planets in much the same way planets orbit the Sun. These satellite orbits are governed by gravity and follow the same fundamental balance between inward gravitational pull and forward motion. Our Moon is the most familiar example, but the solar system…
Continue reading... Planets follow predictable elliptical paths around the Sun, governed by gravity and the principles described by Kepler’s laws of planetary motion. These orbital paths determine each planet’s year length, orbital speed, and changing distance from the Sun. Studying planetary orbits reveals how the solar system…
Continue reading... The Sun is the central star of our solar system and the dominant source of gravity that controls the motion of planets, moons, asteroids, and comets. Containing more than 99.8% of the solar system’s total mass, the Sun’s gravitational influence determines the paths followed by…
Continue reading... Orbital speed is the velocity required for an object to maintain a stable path around a central body. It arises from the balance between gravitational attraction and forward motion. In the near vacuum of space, where air resistance is minimal, an object moving at the…
Continue reading... Most orbits in the universe are not perfect circles but ellipses—slightly oval-shaped paths. This simple geometric shape governs the motion of planets, moons, comets, and many other celestial bodies. In the early 1600s, Johannes Kepler showed that the Sun lies at one focus of a…
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