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Carlos Aguado
if the Universe is the answer, what is the question?
if the Universe is the answer, what is the question?
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Wow! A new Ligo building block of the Universe has been found!

https://dcc.ligo.org/public/0122/P1500213/027/paper.pdf

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On the complexity of making risk analysis to keep standing on the shoulders of giants
Vibration tests begin for High-Luminosity LHC project http://cern.ch/go/6gKq

Image shows the Seismic Truck used for recent vibration measurements. This 24-tonne machine uses its entire weight to push down on the ground, generating wave-like vibrations up to 100 times per second. Image credit Sophia Bennett/CERN © CERN - for terms of use see http://cern.ch/copyright
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kudos
CERN speaks at the +United Nations about the laboratory’s model for international cooperation: http://cern.ch/go/f6Q9
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git pull sun perihelion:lightness
git rebase work
git add presents*
git commit -m "Three Kings 2015"
git review -t friends
git push remember feeling_good
Near and Far

Today marks the point in Earth’s orbit where it is closest to the Sun, known as perihelion. It might seem odd for those in the northern hemisphere for this to occur in the middle of winter, but that’s because the seasons are due largely to the tilt of Earth’s axis relative to its orbital plane. The variation in Earth’s distance from the Sun is minor in comparison, because Earth’s orbit is almost (but not quite) a perfect circle.

The difference between perihelion (closest to the Sun) and aphelion (most distant) for Earth is just under 5 million kilometers. That’s quite a distance, but it is only about 3% of Earth’s average distance. Treating Earth orbit as a perfect circle is actually a good approximation. The same is true for the other planets, which is part of the reason why the whole “orbits are circles” idea of early astronomy lasted as long as it did. Of course that raises the question as to just why planetary orbits are so nearly circular.

There are likely several factors that played a role in forming circular orbits. One is that as early protoplanets form, more elliptical orbits would tend to cross the paths of other bodies, and collision with them would tend to produce more circular orbits. Then their is the fact that large planets such as Jupiter tend to form early on, and their gravitational influence will tend to clump smaller bodies into groups. It could also be due to orbital resonances between smaller bodies, which would tend to stabilize orbits. Then there are affects such as the Kozai mechanism, when tend to align orbits into a common plane. Then there is the fact that circular orbits are more stable against gravitational perturbations than elliptical orbits.

As we’re learning from computer simulations, the dynamics of solar systems are quite complex. But simulations do show that nearly circular orbits are quite common, and studies of exoplanets also show nearly circular orbits in many cases. So it seems that throughout the universe circular orbits are a good approximation for planets.

But it isn’t exact, which is why we can celebrate today as our closest day to the Sun. It also happens to be Isaac Newton’s birthday, which is perhaps fitting given his work on planetary orbits.

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Piaget condensed in Kegan's work: 'The Evolving Self', the Frankfurt school of psychology... more relevant than ever topics. The turn things are taking in this big lab google has become is quite astounding.

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Good time to share this summary thread. On closure, imperialism, self-transforming, roadtrip agendas, planes et al.

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A very original footage, such a nice way to illustrate population inversion!

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Sanely fun!!
The finest example of sportsmanship I've ever seen lol haha.. Two men at the top of their game having fun... how life is meant to be lived!

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...the garage where CernVM was born!
Guess what it is?

Image © CERN - for terms of use see http://cern.ch/copyright

(Answer will be posted on Monday...)
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