The Flattest Star Ever Discovered ! Achernar Star

Ancients were familiar with Achernar since it is visible to the naked eye. Named after an Arabic phrase, the star's name roughly translates as "End of the River."

Achernar was the name given to the star now known as Theta Eridani, or Acamar during classical times. When Acamar was studied, it was the brightest star in its constellation that could be seen from Greece.

Achernar was formed from a molecular cloud or nebula of gas and dust around 37.3 million years ago. The swirling gas and dust were pulled by gravity into the big, bright, bluest star known today as Achernar.

A collision may have caused its fast-spinning feature.

Achernar's distance from the Sun is about 139 light-years / 43 parsecs. Approximately 6.3 times as massive as our sun, the blue star has 7.3 solar radii or more.

With an average temperature of around 15000 Kelvins, Achernar has a surface gravity of about 3.5 cgs and is almost three times hotter than our sun. As compared to the Sun, it emits about 3,000 to 5,000 times more UV rays.

The star spins at an incredibly fast 250 km / 155 mi per second, causing its shape to be oblate.

Polar regions have such high temperatures that a highly energetic solar wind blows material away from the star. As a result, a dense envelope of hot gas and plasma forms around the star.

Achernar is located in the constellation Eridanus “The River”, marking the river’s south end. The star cannot be seen from locations north of 33° North latitude.

The star will end up destroying itself if something causes it to spin even faster. As Achernar is young, it is still fusing hydrogen in its core, which may make it small enough to evolve into a massive white dwarf.

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