Volcanic ‘devil comet’ resprouts its horns after erupting again

Volcanic ‘devil comet’ resprouts its horns after erupting again

A volcanic “devil comet” that is racing toward Earth erupted again on Halloween, causing it to regrow its distinctive “horns.” The latest outburst, which was the second within a month and the third since July, is a reminder that the comet is becoming more volcanically active as it continues its journey toward the heart of the solar system.  

The comet, named 12P/Pons-Brooks (12P), is a cryovolcanic, or cold volcano, comet. Like other comets, 12P has a solid nucleus — a hard, icy shell filled with ice, gas and dust — that is surrounded by a fuzzy cloud, or coma made of materials that leak out of the comet’s insides. 

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