The confirmation was made spectroscopically using large ground-based telescopes by finding precise colors absorbed on Mars that match those absorbed by methane on Earth.

• 使用大型地面望远镜分光镜找到火星吸收的确切颜色，符合地球上甲烷吸收光线所产生的颜色，从而确定了甲烷存在这一结论。