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PostPosted: Thu Sep 23, 2010 8:46 pm 
I happened to see today's Astronomy Picture of the Day and thought it was quite impressive and worth sharing here.

Image

On the linked page it says:

Equinox and the Iron Sun
Credit: NASA / Goddard / SDO AIA Team

Explanation: Today, the Sun crosses the celestial equator heading south at 03:09 Universal Time. Known as an equinox, this astronomical event marks the first day of autumn in the northern hemisphere and spring in the south. Equinox means equal night. With the Sun on the celestial equator, Earth dwellers will experience nearly 12 hours of daylight and 12 hours of darkness. Of course, in the north the days continue to grow shorter, the Sun marching lower in the sky as winter approaches. To celebrate the equinox, consider this view of the Sun in extreme ultraviolet light from the Sun staring Solar Dynamics Observatory. Recorded yesterday, the false-color image shows emission from highly ionized iron atoms. Loops and arcs trace the glowing plasma suspended in magnetic fields above solar active regions.

Ben
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PostPosted: Fri Sep 24, 2010 5:59 am 
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Joined: Mon Jan 18, 2010 3:52 pm
Posts: 2177
Location: The Netherlands
Yes, it's amazing !

But, almost every photo of APOD is amazing :wink:

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Canon 18-55 II plus lots of Minolta MD/M42 lenses and bodies


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