I have some issues with this article, specifically with regards to a consistent sense of the level of technology involved, and the physics.
The nearest exoplanets are around 12 light years away. In the containment procedures, it's mentioned that the planet's "atmospheric haze" would hide the surface, but at these kinds of distances, non-anomalous visual resolution of an exoplanet's surface from Earth is impossible. Not only would amateur astronomers not be able to see the surface, no one could. Which means that the Foundation must have initially sent probes to the planet, before the anomaly was found. It might benefit the article to include a description of the Foundation singling out the planet for exploration due to unexpected spectrographic readings, or something similar.
The line "Luyten b is not expected be habitable for the next hundred years, if ever." should be removed; it answers a question that isn't asked. Also, if the planet has a thick atmosphere with detectable nuclear fallout, it's going to be a lot longer than a hundred years.
Otherwise I do enjoy the basic conceit - seeing the now-settled aftermath of a planetary catastrophe, whose cause is as alien as the long dead inhabitants. However, and this is just my personal preference, this article would be a lot more interesting if it were overall more clinical in tone. It would better fit the premise, and the site as a whole, if it read more like a scientific planetary survey.
And to that point, you might consider changing "Luytenians" to a designation like "SCP-3841-1." It would be more congruent with your designating of "SCP-3841-Ω."
No vote.