Postings I’ve ‘liked’ on reddit.com

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Donald Trump is a unique threat to American democracy (Wash Post)

I think this article from the Washington Post pretty much sums it up for me:

Mr. Trump’s politics of denigration and division could strain the bonds that have held a diverse nation together. His contempt for constitutional norms might reveal the nation’s two-century-old experiment in checks and balances to be more fragile than we knew.

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Words LCV members used to describe Donald Trump

The League of Conservation Voters asked it’s members to describe Donald Trump — here are the top results!

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The Game That Conquered the World (Minecraft)

I like the fact that, in Minecraft, kids take basic rules and do things the game’s authors never envisoned.

Take a look at this article in The Atlantic Monthly where, a 46-year-old father who is anti everything online tries the game to see what attracts his son to it. As you might expect, it surprises him:

Can it be true that in Minecraft, to apply a line of Philip Larkin’s, how we live measures our own nature? An octopus’s garden, a whirling hall of knives … Choose, minecrafter. Build. It’s all you. My son, to my astonishment, is building an international airport. Me, I’ve killed a couple of cows.

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Beautiful picture of a Spacex launch

JCSAT-14 Launch

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Stabilising to the Milky Way shows the rotation of the earth

Rotation of the Earth.

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Supersonic Retro Propulsion for Trips to Mars

Apparently, the decision has been made at NASA that supersonic heavy load parachutes just won’t work.  So instead, a rocket to Mars will enter the Mars atmosphere at supersonic speeds using the shockwave from a blasting “retro” rocket to plow through the air instead of the old fashioned heat shield  (“retro” here meaning opposite the direction of travel, not old fashioned)

Given this decision it’s interesting that SpaceX’s last booster reentry intentionally started it’s reentry burn high to simulate supersonic reentry burn conditions in the Mars atmosphere.    And NASA mobilized special thermal cameras to record this experiment (that otherwise would’ve cost NASA hundreds of millions to test/simulate)

http://www.nasa.gov/press/2014/october/new-commercial-rocket-descent-data-may-help-nasa-with-future-mars-landings/index.html#.VEGN4BbdeI0

Also see:

Development of Supersonic Retro-Propulsion for Future Mars Entry, Descent, and Landing Systems (PDF)

SupersonicRetroPropulsionAnd a video at:

Supersonic Retropropulsion (wind tunnel) Test, Mach 4.6 Schlieren Video (youtube)

I like saying “Supersonic Retro-Propulsion”

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A great photo of the Spacex Falcon CRS-8 launch

Spacex Falcon CRS-8 launch

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Beautiful time lapse video of the Albuquerque balloon festival

I want to go to this someday.

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The Yale Glee Club singing on the train

And the train “conductor” actually conducts:

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The irony here is delicious

View post on imgur.com

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