One of the most famous 'bombs' in the night sky isn't exploding for the reason we thought; it's actually doing something much weirder.
April 6, 2026
Original Paper
The accretion-driven eruption of the recurrent nova T Corona Borealis
arXiv · 2604.02708
The Takeaway
While most novae are thought to happen at a steady, predictable pace, this star seems to erupt because of sudden 'binge-feeding' events. It suggests the star's 80-year cycle is controlled by random bursts of gas rather than a constant cosmic clock.
From the abstract
T Corona Borealis (T CrB) is a symbiotic recurrent nova with an $\simeq 80$ yr recurrence interval, the eruptions of which occur on top of a $\simeq 15$ yr long high-brightness state. We show that the high-brightness state is best explained as the response of a high-viscosity ($\alpha=3$) accretion disk to a unique event in which the mass transfer rate from the donor star increases by a factor $\simeq 100$, from $\dot{M}\mathrm{(quies)}= 2 \times 10^{-9} M_\odot$ yr$^{-1}$ up to $\dot{M}\mathrm{