Before Star Trek: Discovery was around, back in 2009, J.J. Abrams set up several mysteries during the first Kelvin Timeline movie. The imaginatively named Star Trek. The most significant one of these for the 'Prime' Star Trek timeline was the Romulan Supernova. But is Star Trek: Discovery Season 5 explain the Romulan Supernova?
That’s from tie-in material, not the film itself.
From the script:
If the sun in question was the Romulan star, then turning it into a black hole to contain the explosion would not save the planet.
Killing the star would not save their planet.
Anything involving Romulus’ star means that ‘saving the planet’ is completely impossible.
Yeah, I agree that that part of the dialogue is problematic. However, “Picard” definitively stated that it was the Romulan star.