The brightening since 2006 could be caused by the black hole's capturing winds from an orbiting star, or by a gas cloud that spiraled into the black hole.
In the well known Pleiades star cluster, starlight is slowly destroying this wandering cloud of gas and dust.
在著名的昴宿星团里，星光正缓慢地摧毁这些游荡的气体和尘埃的云团。
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In fact, the cosmic jellyfish is seen to be part of bubble-shaped supernova remnant IC 443, the expanding debris cloud from a massive star that exploded.