Phát hiện hành tinh lạnh giá trong “vùng cấm” của vũ trụ
Các nhà nghiên cứu xác định WD 1856+534b có khối lượng gấp khoảng 5,2 lần sao Mộc và nhiệt độ bề mặt là -52°C, khiến nó trở thành ngoại hành tinh lạnh nhất từng được quan sát trực tiếp ánh sáng.
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