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Astroearth - by CarlCan

Jason and the Argonauts

January 11th 2009 14:32
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A nebulous shell, now surrounds the site of the explosion


About 12 hundred ago an ordinary star in what is now the constellation of Vela brightened by about 100 million times enough to compete with our Moon as the brightest object in the night sky, The star was probably about 15 times the size of our sun before going supernova.

Now all that remains is a remnant shell of expanding gases that surrounds the pulsar pulsar (PSR J0835-4510), a rapidly-spinning neutron star only a few kilometers in diameter is all that is left of the star. This tiny but powerful object spins about 11 times a second, giving off huge amounts of radiation but can still be seen through a telescope.

The name Vela means sail according to mythology belonging to the ship Argo sailed by Jason and the Argonauts. Vela was once part of the ancient constellation of Argo Navis (ship) and is broken into 4 separate constellations consisting of Carina (the keel), Vela (the sail), Puppis (the pup), and Pyxis (the compass).

Could the effects of star explosions affect earth ?.

While it is possible that distant star explosions would have a minor impact on earth there is a real threat if Eta Carinae was to explod life on earth would be at risk. Eta Carinae (1 Carinae or 1; Car) is a hypergiant luminous blue variable star in the Carina constellation) the most massive star known in our galaxy with 100 times as mass and 5 million times as luminous as the Sun is rapidly burning matter off its surface. At any time its core could collapse into a black hole, which may result in a gamma-ray burst that can devastate life on Earth. Eta Carinae will explode in time, when? perhaps in the next 10 thousand years.

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Comments
2 Comments. [ Add A Comment ]

Comment by S.L.

January 11th 2009 15:22
Another good one, CarlCan! Let's just hope that the explosion doesn't come for a few thousand more years!

Comment by NoaIzumi

February 14th 2009 16:41
According to Wikipedia, Eta Carinae is between 7500 to 8000 light years away. That might be far enough that we'd be OK, but it's a bit close for my comfort.

Eta Carinae is a rarity too. Apparently there are (fortunately) only a couple of dozen stars that large in the entire galaxy.

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