But how does Nasa know with such certainty that T CrB is going to erupt above another couple of months especially? It's a make any difference of mathematical calculations and visible proof. For instance, the final time T CrB experienced a nova was in 1946 – seventy eight years in https://econopass.com/news/science-technology/get-ready-for-a-stellar-show-nasa-predicts-summer-2024-nova-explosion/