Interplanetary/Interstellar World Blight
I have a bacterial organism called the "World Blight" this creature's life cycle revolves around being introduced to a new planet, spreading across the planet and terraforming it to its liking, and then somehow reproducing. This organism is an extremophile being able to withstand extreme heat, cold, pressure, acidity, salinity, and nearly every other harsh condition thrown at it. It spreads across the planet by ingesting available minerals and compounds spreading across the planet like a mold, slowly covering the entire surface after being introduced. How can my organism spread itself from one planet to the next and possibly from one solar system to the next without help from sapient beings or technology?
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The organism first erodes bedrock into verticle shafts, tens of meters deep.
Through a series of complex metabolic processes it begins to generate a build-up of waxy deposit at the bottom of the shaft - this grows, till it fills half the shaft then stops.
Next, like an iris closing, the top of the shaft becomes sealed with a tough plug of resinous mass.
Attribution abduh137 2019.
The waxy substance - a high explosive with a super-high detonation speed in the order of 15km per second - in a massive explosion, triggering a cascade of similar explosions from nearby shafts, blows the resinous masses out of Earth's gravity well, they then make their way into interstellar space - all the time gradually shedding bacterial spores to be taken on the whims of the solar wind to new worlds to conquor.
If you're wondering about the feasability of a high explosive being enough - we have one which is almost up to the job - Octanitrocubane. It's detonation speed is 10.1 km per second, just 1 km per second shy of escape velocity. Atmo resistance should be easily overcome by one at 15 km per second.
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