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Robert Scott Herrick
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Robert Scott Herrick

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Imagine a battery-powered plane that has 10 engines and can take off like a helicopter and fly efficiently like an aircraft. That is a concept being...
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One last picture of the sandbox after delivery.
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Neat!
David Amerland originally shared:
 
Google Uses its Entire Computational Might to Help You Find Your Phone

Unless your phone is grafted onto your hand, at some point you will misplace it and then will need to recruit an army of helpers to help you find it. If there is no handy army to recruit Google offers to let you use desktop search and the might of its data centers to help you locate it within 24 meters on a Google map plus it will even offer to make it ring for you. All you need to do is make sure you have the Google Android app updated to its latest version: http://goo.gl/pDb1D

Neat hey? Yep! It's free, it's cool and when you misplace your phone or even leave it behind at a friend's house, invaluable. 
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Robert Scott Herrick

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Good to know Carmack is welcome at SpaceX.
 
John Carmack @ID_AA_Carmack
@elonmusk Congratulations! How many engines are lit for landing? Can you differentially throttle for more degrees of control?
https://twitter.com/ID_AA_Carmack/status/588160572153298944

Elon Musk @elonmusk
@ID_AA_Carmack Thanks! 3 of 9 engines are lit initially, dropping to 1 near ground. Even w 1 lit, it can't hover, so always land at high g
https://twitter.com/elonmusk/status/588165046385115136

John Carmack @ID_AA_Carmack
@elonmusk if you had two throttled near ground, you could roll the principle axis and get some lateral control independent of attitude.
https://twitter.com/ID_AA_Carmack/status/588166166876590080

Elon Musk @elonmusk
@ID_AA_Carmack Looks like the issue was stiction in the biprop throttle valve, resulting in control system phase lag. Should be easy to fix.
https://twitter.com/elonmusk/status/588166157510828033

John Carmack @ID_AA_Carmack
@elonmusk I lost hours today to thoughts of rockets...
https://twitter.com/ID_AA_Carmack/status/588166558092021761

Elon Musk @elonmusk
@ID_AA_Carmack Well, if you love rockets, come work on them with me at SpaceX!
https://twitter.com/elonmusk/status/588167701069230081


FYI John Carmack is CTO at Oculus Rift and apparently if he tires of that has an open job offer at SpaceX.
https://www.oculus.com/blog/john-carmack-joins-oculus-as-cto/

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But your mother isn't... Trebek.
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Robert Scott Herrick

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Via +SpaceX's Facebook page:
"Falcon 9 first stage approaches Just Read the Instructions." 
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getting closer .... 
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+SpaceX launch attempt #2. Weather still iffy.
 
Weather is 60% "go" for today’s Falcon 9 launch attempt, sending Dragon to resupply the International Space Station. Lightning and clouds are still a concern. Liftoff is targeted for 4:10pm ET – watch live: www.spacex.com/webcast
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doh...
@elonmusk
Ascent successful. Dragon enroute to Space Station. Rocket landed on droneship, but too hard for survival.
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Robert Scott Herrick

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Launch coverage has just started. Just over 17 minutes until launch.

Update: Clock has restarted after a hold for weather. New lift off time is scheduled for 7:03pm EST, 4:03 PST.
 
Watch the SpaceX Thales Mission Launch
https://www.youtube.com/watch?v=nBwAYT_ogj4
http://www.spacex.com/webcast/

LC-40 Cape Canaveral Air Force Station Cape Canaveral, FL 32920 28.562173, -80.577507

http://www.spacex.com/sites/spacex/files/spacexthalesfactsheet_final.pdf
SpaceX Thales Mission Launch
Mon, April 27, 5:55 PM
http://www.spacex.com/webcast/

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Clock has restarted. T-22 minutes.
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Robert Scott Herrick

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Made a 4x6’ sandbox for a birthday present. I saw a picture of one like this online and recreated it using 5.5" cedar fence pickets, 2x4s, and 2x12s. Added a lip on top of the seatbacks to make it sturdier, then that lip served as a nice place for handles. Mounted the handles offset for easy lid opening. Not too bad for winging the design. 
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more pics of the wagon 
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Higher quality footage of +SpaceX  #Falcon9  landing. 
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looked good for a few seconds
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So close!
 
Video of Falcon 9 first stage landing burn and touchdown on Just Read the Instructions https://vine.co/v/euEpIVegiIx
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"It's this god damned controller!" - Player 1
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Neat
 
NASA Mars Rover's Weather Data Bolsters Case for Brines in Soil
The Rover Environmental Monitoring Station (REMS) on NASA's Curiosity Mars rover includes temperature and humidity sensors mounted on the rover's mast. One of the REMS booms extends to the left from the mast in this view.

Fast Facts:
› Conditions that might produce liquid brine in Martian soil extend closer to the equator than expected
› Perchlorate salt in soil can pull water molecules from the atmosphere and act as anti-freeze
› Presence of brine would not make Curiosity's vicinity favorable for microbes

April 13, 2015: Martian weather and soil conditions that NASA's Curiosity rover has measured, together with a type of salt found in Martian soil, could put liquid brine in the soil at night.

Perchlorate identified in Martian soil by the Curiosity mission, and previously by NASA's Phoenix Mars Lander mission, has properties of absorbing water vapor from the atmosphere and lowering the freezing temperature of water. This has been proposed for years as a mechanism for possible existence of transient liquid brines at higher latitudes on modern Mars, despite the Red Planet's cold and dry conditions.

New calculations were based on more than a full Mars year of temperature and humidity measurements by Curiosity. They indicate that conditions at the rover's near-equatorial location were favorable for small quantities of brine to form during some nights throughout the year, drying out again after sunrise. Conditions should be even more favorable at higher latitudes, where colder temperatures and more water vapor can result in higher relative humidity more often.

"Liquid water is a requirement for life as we know it, and a target for Mars exploration missions," said the report's lead author, Javier Martin-Torres of the Spanish Research Council, Spain, and Lulea University of Technology, Sweden, and a member of Curiosity's science team. "Conditions near the surface of present-day Mars are hardly favorable for microbial life as we know it, but the possibility for liquid brines on Mars has wider implications for habitability and geological water-related processes."

The weather data in the report published today in Nature Geosciences come from the Curiosity's Rover Environmental Monitoring Station (REMS), which was provided by Spain and includes a relative-humidity sensor and a ground-temperature sensor. NASA's Mars Science Laboratory Project is using Curiosity to investigate both ancient and modern environmental conditions in Mars' Gale Crater region. The report also draws on measurements of hydrogen in the ground by the rover's Dynamic Albedo of Neutrons (DAN) instrument, from Russia.

"We have not detected brines, but calculating the possibility that they might exist in Gale Crater during some nights testifies to the value of the round-the-clock and year-round measurements REMS is providing," said Curiosity Project Scientist Ashwin Vasavada of NASA's Jet Propulsion Laboratory, Pasadena, California, one of the new report's co-authors.

Curiosity is the first mission to measure relative humidity in the Martian atmosphere close to the surface and ground temperature through all times of day and all seasons of the Martian year. Relative humidity depends on the temperature of the air, as well as the amount of water vapor in it. Curiosity's measurements of relative humidity range from about five percent on summer afternoons to 100 percent on autumn and winter nights.

Air filling pores in the soil interacts with air just above the ground. When its relative humidity gets above a threshold level, salts can absorb enough water molecules to become dissolved in liquid, a process called deliquescence. Perchlorate salts are especially good at this. Since perchlorate has been identified both at near-polar and near-equatorial sites, it may be present in soils all over the planet.

Researchers using the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter have in recent years documented numerous sites on Mars where dark flows appear and extend on slopes during warm seasons. These features are called recurring slope lineae, or RSL. A leading hypothesis for how they occur involves brines formed by deliquesence.

"Gale Crater is one of the least likely places on Mars to have conditions for brines to form, compared to sites at higher latitudes or with more shading. So if brines can exist there, that strengthens the case they could form and persist even longer at many other locations, perhaps enough to explain RSL activity," said HiRISE Principal Investigator Alfred McEwen of the University of Arizona, Tucson, also a co-author of the new report.

In the 12 months following its August 2012 landing, Curiosity found evidence for ancient stream beds and a lakebed environment more than 3 billion years ago that offered conditions favorable for microbial life. Now, the rover is examining a layered mountain inside Gale Crater for evidence about how ancient environmental conditions evolved. JPL, a division of the California Institute of Technology in Pasadena, manages the Mars Science Laboratory and Mars Reconnaissance Projects for NASA's Science Mission Directorate, Washington.

For more information about Curiosity, visit:
www.nasa.gov/msl and http://mars.jpl.nasa.gov/msl/

Credit: NASA/JPL-Caltech/MSSS

+NASA Jet Propulsion Laboratory 

#NASA #Space #Mars   #Science #Curiosity #Rover   #Laboratory #Brine #Soil   #Perchlorate #Salt #Water   #Deliquescence #REMS   #Humidity   #Temperature   #Habitability #Life #Exploration #JPL
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Robert Scott Herrick

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Here we go:
http://www.spacex.com/webcast/ CRS-6 to resupply the International Space Station. T-13 minutes.
SpaceX designs, manufactures and launches advanced rockets and spacecraft..
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damn. i woulda missed it anyway
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