Supergiant star nearest to Earth on its way to spectacular explosion
- IPL spot-fixing case: Delhi Police to trace money trail in four cities
- PM-level talks: India to convey concerns over Ladakh incursion to Chinese Premier
- IPL 2013 LIVE SCORE: Kings XI Punjab vs Mumbai Indians
- Rajapaksa slams Tamil diaspora for lack of support in reconciliation process
- Karnataka CM Siddaramaiah inducts 28 ministers, keeps tainted away
New image from ESA's Herschel space observatory has revealed multiple arcs around Betelgeuse, the nearest red supergiant star to Earth, and scientists analysing the image have suggested that the star and its arc-shaped shields could collide with an intriguing dusty 'wall' in 5000 years.
Betelgeuse rides on the shoulder of the constellation Orion the Hunter. It can easily be seen with the naked eye in the northern hemisphere winter night sky as the orange-red star above and to the left of Orion's famous three-star belt.
Roughly 1,000 times the diameter of our Sun and shining 100,000 times more brightly, Betelgeuse's impressive statistics come with a cost.
For this star is likely on its way to a spectacular supernova explosion, having already swelled into a red supergiant and shed a significant fraction of its outer layers.
The new far-infrared view from Herschel shows how the star's winds are crashing against the surrounding interstellar medium, creating a bow shock as the star moves through space at speeds of around 30 km/s.
A series of broken, dusty arcs ahead of the star's direction of motion testify to a turbulent history of mass loss.
Closer to the star itself, an inner envelope of material shows a pronounced asymmetric structure. Large convective cells in the star's outer atmosphere have likely resulted in localized, clumpy ejections of dusty debris at different stages in the past.
An intriguing linear structure is also seen further away from the star, beyond the dusty arcs. While some earlier theories proposed that this bar was a result of material ejected during a previous stage of stellar evolution, analysis of the new image suggests that it is either a linear filament linked to the galaxy's magnetic field, or the edge of a nearby interstellar cloud that is being illuminated by Betelgeuse.
- Destitute, orphan students outclass rest in Andhra Class 10 exams
- To re-energise ties, PM wants to visit US, waits for confirmation
- NIA court says no terror link, frees 'Hizbul militant' Liyaqat on bail
- CBI arrests its coal allotments investigator on bribery charge
- ‘Cricketer-bookie Amit may have used Jiju to reach Sree’
- BCCI chief N Srinivasan says police must prove spot-fixing allegations