Huge star explosion to appear in sky in once-in-a-lifetime event
==========

Sometime between now and September, a massive explosion 3,000 light years from Earth will flare up in the night sky, giving amateur astronomers a once-in-a-lifetime chance to witness this space oddity. The binary star system in the constellation Corona Borealis is normally too dim to see with the naked eye. But every 80 years or so, exchanges between its two stars spark a runaway nuclear explosion, making it appear as if a new star has suddenly popped up in our night sky for a few days. This event has been witnessed twice before, in 1866 and 1946. There are only around 10 recurring novas in the Milky Way and surrounding galaxies. The explosion is caused by a white dwarf and a red giant in a binary star system. The white dwarf orbits the red giant, and matter being ejected by the red giant collects near the surface of the white dwarf. Once enough mass has built up on the white dwarf, it triggers a runaway thermonuclear reaction, resulting in a massive explosion. The James Webb space telescope will observe the outburst of T Coronae Borealis. To witness the event, one simply needs to look in the direction of the Corona Borealis constellation.



https://www.thestandard.com.hk/breaking-news/section/6/215090/Huge-star-explosion-to-appear-in-sky-in-once-in-a-lifetime-event