unlike other exploding stars, which peak at brightness for a couple of weeks at most, this supernova, peaked for 70 days, according to nasa 据美国国家航空航天局透露,这颗超新星与其他爆发的恒星不同,其发亮状态最长可达七十天,而其它爆发的恒星发亮时间最多几个星期。
x-rays are a byproduct of high-energy electron discharges in the sun, in exploding stars, and even in lightning . many scientists did not expect sparks alone to do the trick x射线是太阳爆炸星体甚至闪电中的高能电子放电带来的副产品,很多科学家并不认为电火花独自也能产生出这种射线。
sparks created in a lab give off x-rays, scientists announced monday . x-rays are a byproduct of high-energy electron discharges in the sun, in exploding stars, and even in lightning x射线是太阳爆炸星体甚至闪电中的高能电子放电带来的副产品,很多科学家并不认为电火花独自也能产生出这种射线。
three other extrasolar planets believed to be of rocky composition have been reported, but they orbit a pulsar-the flashing corpse of an exploded star-rather than a normal type of star 之前人们曾报道过另外三颗据信由岩石组成的太阳系外行星,但是,它们是围绕着一颗脉冲星(恒星爆发后遗留的发光的残存物)运转的,而不是一颗常态的恒星。
observations from each telescope highlight distinct features of the supernova remnant, a fast-moving shell of iron-rich material from the exploded star, surrounded by an expanding shock wave that is sweeping up interstellar gas and dust 各望远镜的观测突出的是超新星遗迹不同的部位,恒星爆发产生的高速富铁壳层,周围包裹着膨胀的激波,扫过星际气体和尘埃。