https://www.youtube.com/watch?v=wp0p_wWYp6E
转载来源：Harry Evett
原标题：A Journey Through the Solar System at the Speed of Light
注：这里展示的所有距离都是该天体和太阳的平均距离。（基本可以认为视频中是以天体的轨道半长轴作为天体与太阳的距离的）
原简介（一部分）：This video is a visualisation of the speed of light, by beginning at the Sun and travelling about 1 light day through the Solar System at the speed of light. All objects and distances are to scale.
It should be noted that all objects in this video are at their average distance from the Sun. All objects orbiting the Sun have some degree of ellipsicity to their orbit (Earth's distance from the Sun varies by millions of kilometres), but some objects shown here, namely the dwarf planets and comets, are sometimes hundreds of millions of kilometres closer or farther away from the Sun than shown in this video. In fact, both Orcus and Pluto sometimes come closer to the Sun than Neptune.
This is also the speed of light from the perspective of a stationary observer. It is currently thought impossible for objects with mass to travel at lightspeed, and if it were to occur regardless, relativistic effects would render the journey instantaneous from the perspective of the traveller.
