City-size, cold-volcano comet transforms into a glowing 'snail shell' after major explosive outburst

Following a massive cryovolcanic eruption, the mysterious Comet 29P/Schwassmann-Wachmann has been morphed into a giant spiral ...
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City-size cold-volcano comet erupts into a glowing cosmic 'snail shell'

Comet 29P/Schwassmann-Wachmann 1, a city-sized icy body that orbits the Sun at roughly 6 astronomical units, is known for sudden outbursts that can produce a glowing coma with a spiral, ...