Nova Explosion:
Global professionals and amateur astronomers are waiting for an once-in-a-lifetime nova explosion which will occur in September, 3,000 light-years from the Earth.
- Nova Explosion is the dramatic instance of a star exploding as it interacts with another, nearby star.
- It’s a one of many, repeated moments during the long, slow, death of two neighboring stars in the same system.
- Astronomers are waiting for the fiery explosion of T Coronae Borealis, also dubbed the “Blaze Star” and known to astronomers as “T CrB”.
- For T CrB, this nova event happens roughly every 80 years — it’s like Halley’s Comet event every 76 years — so, astronomers call T CrB a “recurrent” nova.
- They believe T CrB’s prior eruptions were observed as long ago as December 1787 and even in October 1217 AD.
- When T CrB erupts, its luminosity will increase dramatically, making it visible to the naked eye for several days.
- The system contains two stars — a white dwarf and a red giant.
- The white dwarf is an incredibly dense remnant of a once larger star. It’s about the size of planet Earth but with the same mass as our sun.
- Its neighbor, the red giant, is in its final years of existence and is slowly being stripped of hydrogen by the gravitational pull of the denser white dwarf.
- This star “cannibalism” causes a tremendous buildup of pressure and heat, which eventually triggers a huge thermonuclear explosion.
