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NASA Astronomy Picture of the Day:

The arms of a grand design spiral galaxy 60,000 light-years across are unwound in this digital transformation of the magnificent 2005 Hubble Space Telescope portrait of M51. In fact, M51 is one of the original spiral nebulae, its winding arms described by a mathematical curve known as a logarithmic spiral, a spiral whose separation grows in a geometric way with increasing distance from the center. Applying logarithms to shift the pixel coordinates in the Hubble image relative to the center of M51 maps the galaxy's spiral arms into diagonal straight lines. The transformed image dramatically shows the arms themselves are traced by star formation, lined with pinkish starforming regions and young blue star clusters. Companion galaxy NGC 5195 (top) seems to alter the track of the arm in front of it though, and itself remains relatively unaffected by this unwinding of M51. Also known as the spira mirabilis, logarthimic spirals can be found in nature on all scales. For example, logarithmic spirals can also describe hurricanes, the tracks of subatomic particles in a bubble chamber and, of course, cauliflower. NASA Coverage: Total Solar Eclipse of 2024 April 8

Photo by Hubble Heritage Project

You are my friend,
my sweet Nancy May.
I'll love you forever,
forever and a day.

We shall get married,
going on our way,
to a small house,
not far away.

We will be happy,
as man and wife,
as we live our lives,
without any strife.

What must I do,
helping you understand,
you are the best thing
to happen, so grand.

No more the worry,
no more crying in bed,
because of something
stupid, I said.

I love you dearly,
truly I do,
for all to see.
I love you.

When much younger,
I traveled, returning home
on a Friday after talking to
employes for the prior days.

..."  The relatively small size of the Moon and its shadow make eclipses truly once-in-a-lifetime opportunities. On average, total solar eclipses are visible somewhere on Earth once every few years. But from any one location on Earth, it is roughly 375 years between solar eclipses." ....   More at The Conversation ➜

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