Hoàn tất “bản đồ vũ trụ”
Sauhơn 8 năm theo dõi qua kính viễn vọng đặc hiệu tại Đài Thiên văn Apachetrên dãy núi Sacramento, bang New Mexico (Mỹ), các nhà thiên văn trongdự án “Khảo sát bầu trời kỹ thuật số Sloan” vừa hoàn tất “bản đồ vũtrụ”, một bản đồ màu 3 chiều, bao quát 1/4 bầu trời...
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