The Smiling Star

That killer Smile..(uff...)



Recently, NASA SDO(Solar Dynamics Observatory) shared an image of dark patches on the Sun's surface that resembles big eyes and a cute smile.


NASA explained that the patches are called CORONAL HOLES, which can be seen using ultraviolet light but are naturally invisible to the human eyes.



What's a CORONAL HOLE??


A blow can end our communication..



Coronal holes are the regions on the sun's surface(also called the photosphere) from where the fast solar wind jets out into space. Because they contain little solar material, they have lower temperatures and thus appear much darker than their surroundings.


In coronal holes, the magnetic field is open to interplanetary space and transmits solar material out in a wildly high-speed stream of solar wind.


These coronal holes can last between a week to a few months.



What do these Coronal holes tell us?


According to NASA, "These 'Coronal holes' are important to help us get a better knowledge and develop a better understanding of the space environment around the earth through which our technology and astronauts travel. 


While it's certainly not very clear as to what exactly causes coronal holes, they appear to correlate to areas on the sun where magnetic fields soar up and away, without spiraling back down to the surface as they do elsewhere on the photosphere.


Solar Winds v/s Earths Magnetic Field


Scientists study these fast-moving solar wind streams because they occasionally interact with the earth's magnetic field causing a geomagnetic storm, which can expose satellites to radiation and impede with communications and signals.

Location: VMR7+HJ Mumbai, Maharashtra, India

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