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In a strange twist of fate…

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…NASA’s Hubble Space Telescope accidentally
witnessed a comet in the act of breaking apart.

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Astronomers did not know that Comet K1
was breaking apart when they first viewed it…

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…In fact, this comet wasn’t even Hubble’s original target.

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The team chose Comet K1 when they
were unable to observe their first choice.

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To the surprise of researchers, 
Hubble returned images with at least four comets. 

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Each fragment had a distinct coma, 
the fuzzy envelope of gas and dust 
that surrounds a comet's icy nucleus.

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Hubble cleanly imaged the fragments…

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…but from ground-based telescopes, 
they appeared as bright blobs.

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Hubble’s images were taken just one month after 
K1’s closest approach to the Sun, called perihelion. 

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During perihelion, a comet experiences 
its most intense heating and maximum stress. 

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Just past perihelion is when some 
long-period comets like K1 tend to fall apart.

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Some of Hubble’s most famous images of 
a fragmenting comet are of Comet Shoemaker-Levy 9…

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…but those Hubble images were taken
long after the comet broke into pieces. 

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The team estimates that K1 began 
to disintegrate eight days before Hubble viewed it. 

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Hubble took three images, one on each day 
from November 8 through November 10, 2025. 

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As it watched the comet, 
one of K1’s smaller pieces also broke up.

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Because Hubble’s sharp vision can distinguish 
extremely fine details, the team could trace the history 
of the fragments back to when they were one piece. 

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That allowed them to reconstruct the timeline. 
But in doing so, they uncovered a mystery: 

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Why was there a delay between 
when the comet broke up and when 
bright outbursts were seen from the ground? 

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When the comet fragmented 
and exposed fresh ice, 
why didn’t it brighten almost instantaneously?

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The team looks forward to finishing 
their analysis of the gases released by the comet. 

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Spectroscopic analysis from Hubble’s instruments 
will likely reveal much more about the composition 
of K1 and the very origins of our solar system.

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Hubble's data could provide key insights into 
the physical processes active on the comet's surface.

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K1 is now a collection of fragments 
about 250 million miles from Earth. 

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It is heading out of the solar system, 
not likely to ever return.

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Never before has Hubble caught a fragmenting 
comet this close to when it actually fell apart. 

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Sometimes the best science happens by accident.

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[ Follow us on social media @NASAHubble ]

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[ NASA MEATBALL!!!!!! ]