投稿日：2018/04/17(火) 12:50
投稿者：Mike　[home]　[mail]

I'm a housewife finpecia 1mg tablet 'Comets have a dark, soot-like coating on their icy surfaces, making them darker than most asteroids,' said the study's co-author, Tommy Grav of the Planetary Science Institute in Tucson, Ariz. 'Comet surfaces tend to be more like charcoal, while asteroids are usually shinier like the moon.'