 = deltaTime * 10 / 1000;
            earthDayCount += earthDaysPassed;

            planets.forEach(planet => {
                if (planet.orbitSpeed > 0) {
                    planet.angle += (planet.orbitSpeed * earthDaysPassed / 365) * Math.PI * 2;
                }
            });

            // 更新地球日显示
            const now = performance.now();
            if (now - lastEarthDayUpdate > 100) {
                document.getElementById('earthDay').textContent = Math.floor(earthDayCount);
 