Every time the comet passes the sun and planets, their gravitational pulls change the comet's path by small amounts.

每次彗星经过太阳和行星时，它们的引力会轻微地改变彗星的轨迹。

Our sun and planets and moons and asteroids and comets, everything in our solar system began as a cloud of dust.

我们的太阳、行星、卫星、小行星和彗星，我们太阳系中的一切都始于一团尘埃。

Ordinarily, the intense sunlight made it impossible to see or photograph the movement of light as it passed the sun and planets.

通常，强烈的阳光使人们无法看到或拍摄经过太阳和行星时的光的运动。