用“NGC 6744”造句大全,NGC 6744造句
1、Viewed from Earth, NGC 6744 is about two-thirds the size of a full moon, but it's so faint you can't see it without a backyard telescope.
1、Viewed from Earth, NGC 6744 is about two-thirds the size of a full moon, but it's so faint you can't see it without a backyard telescope.