Những kẻ cưỡng đoạt trong vũ trụ
hi hai thiên hà tới gần nhau, thiên hà có kích thước lớn hơn sẽ lấy hết sao của đối thủ, một nghiên cứu cho thấy.Những ngôi sao từ một thiên hà (dưới) bị hút sang thiên hà lớn hơn, tạo thành vệt sáng khổng lồ. Ảnh: Newscientist.Trong vũ trụ có một số thiên hà tuy nhỏ nhưng lại sở hữu rất nhiều ngôi sao so với các thiên hà lớn. Ngược lại, nhiều thiên hà chỉ có vật chất tối chứ hầu như không có ngôi sao.
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