Nasa EV Lacertae 250408


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Description Explosión de EV Lacertae
English: Featured image of NASA. Explosión de EV Lacertae:
For many years scientists have known that our sun gives off powerful explosions, known as flares, that contain millions of times more energy than atomic bombs.

But when astronomers compare flares from the sun to flares on other stars, the sun's flares lose. On April 25, 2008, NASA's Swift satellite picked up a record-setting flare from a star known as EV Lacertae. This flare was thousands of times more powerful than the greatest observed solar flare. But because EV Lacertae is much farther from Earth than the sun, the flare did not appear as bright as a solar flare. Still, it was the brightest flare ever seen from a star other than the sun.
What makes the flare particularly interesting is the star. EV Lacertae is much smaller and dimmer than our sun. In other words, a tiny, wimpy star is capable of packing a very powerful punch.

How can such a small star produce such a powerful flare? The answer can be found in EV Lacertae's youth. Whereas our sun is a middle-aged star, EV Lacertae is a toddler. The star is much younger than our sun, and is still spinning rapidly. The fast spin, together with its churning interior, whips up gases to produce a magnetic field that is much more powerful than the sun's magnetic field.

Español: Imágen destacada en la NASA:

Durante muchos años, los científicos creían saber qué producía las poderosas explosiones, conocidas como llamaradas, que contienen millones de veces más energía que una bomba atómica.
Pero cuando los astrónomos compararon las llamaradas del Sol con las de otras estrellas, las llamaradas del Sol se quedaban atrás. En abril de 2008, los veloces satélites de la NASA captaron videos sobre la llamarada de la estrella conocida como EV Lacertae. Esta llamarada fue miles de veces más poderosa que la asombrosa llamarada del Sol.
¿Qué es lo que hace a esta llamarada tan interesante en la estrella? EV Lacertae es mucho más pequeña y debil que nuestro Sol. En otras palabras, una pequeña y debilucha estrella es capaz de liberar mucha energía.

¿Cómo puede, una estrella tan pequeña, producir una llamarada tan poderosa? La respuesta puede encontrarse en la juventud del EV Lacertae. Mientras que el Sol es una estrella de antiguedad media, EV Lacertae es más joven. La estrella es mucho más joven que nuestro Sol, y permanece girando. El rápido giro, junto con su agitado interior, desprende gases para producir un campo magnético que es mucho más poderoso que el de nuestro Sol.
Source NASA Image of the Day Gallery
Author Casey Reed/NASA


Public domain This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)

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