天文学家很快就发现这不是普通的太阳黑子，而是个巨型黑子群，其中有些黑子比地球还要大的多。
Astronomers soon realized this is not your average sunspot-it's a giant cluster of sunspots, several of which are larger than our entire planet.
类星体比地球环绕太阳的轨道还要大，比太阳表面更热，它们产生的光线足以在整个已知宇宙中被观测到。
Quasars are bigger than Earth's orbit around the sun and hotter than the exterior of the sun, producing enough light to be observed across the known universe.
类星体比地球环绕太阳的轨道还要大，比太阳表面更热，它们产生的光线足以在整个已知宇宙中被观测到。
Quasars are bigger than Earth's orbit around the sun and hotter than the exterior of the sun, producing enough light to be observed across the known universe.
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