He explains that just as Earth revolves around the sun once a year, the solar system orbits the center of the Milky Way Galaxy once every 260 million years.
林中斌解釋，地球繞太陽運行一圈（公轉）需一年，而整個太陽系繞行更大的銀河系宇宙運行，一圈約 2 億 6,000 萬年。