Betelgeuse's Brightness Wavers Due to a Companion Star and Its Swirling Trail of Gas
了解参宿四的大气层是如何被它的伴星改变的，伴星留下了膨胀气体的痕迹。
Mysterious, irradiated 'scar' in our galaxy points to 2 stars that almost hit the sun
天文学家追踪到了太阳系周围电离气体的神秘“疤痕”，其来源是数百万年前与太阳近距离飞过的两颗恒星。
