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SOLAR RADIO STORM: Did you know sunspots can make noise? Consider the following: "Over the past few days, I have been recording a sustained solar radio storm at 180 MHz," reports amateur radio astronomer Thomas Ashcraft of New Mexico. "It consists of Type I radio bursts and sounds like ocean surf. Here is an audio sample from March 27th at 1930 UT. The sun seems to be entering a new phase of dynamism."

Radio emissions like these are caused by plasma instabilities in the sun's atmosphere above sunspots. With the sun becoming 'radio-active,' it's no coincidence that sunspots are emerging in abundance. Leading the way is behemoth active region AR1176, shown here in a photo taken yesterday by Larry Alvarez of Flower Mound, Texas:

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A RAINBOW AT NIGHT: Recipe for a rainbow: Add bright sunlight to raindrops and voila!--a beautiful band of multi-colors arcs across the sky. With such an ingredient list, you might suppose that rainbows can only be seen during the day, yet on March 24th Ethan Tweedie of Kamuela, Hawaii, recorded this spectacular example long after dark:

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Full article at spaceweather.com

 

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