tkdguy Posted May 3, 2013 Author Report Share Posted May 3, 2013 Spring Break is over Quote Link to comment Share on other sites More sharing options...
tkdguy Posted May 3, 2013 Author Report Share Posted May 3, 2013 ISS Doesn't Quite Dodge A 'Bullet'Good thing they caught that in time. Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted May 4, 2013 Report Share Posted May 4, 2013 Alien Earth concept is stifling to search for ET life. Quote Link to comment Share on other sites More sharing options...
tkdguy Posted May 5, 2013 Author Report Share Posted May 5, 2013 Some news of interest to sky watchers: The Eta Aquarid meteor shower, created by bits of Halley's Comet, peaks tonight. Quote Link to comment Share on other sites More sharing options...
Cancer Posted May 6, 2013 Report Share Posted May 6, 2013 Alien Earth concept is stifling to search for ET life.I don't see this as an issue ... at this point. Once we do manage to find a real Earthlike planet, it'll be an issue. But until then, the search for the one is pretty much the same as the search in general. Quote Link to comment Share on other sites More sharing options...
Cancer Posted May 6, 2013 Report Share Posted May 6, 2013 Sustained flight at mach 5: X-51 flight on May 1 Quote Link to comment Share on other sites More sharing options...
tkdguy Posted May 7, 2013 Author Report Share Posted May 7, 2013 Highest Energy Gamma Ray Burst Detected Annular Solar Eclipse This Week Quote Link to comment Share on other sites More sharing options...
tkdguy Posted May 8, 2013 Author Report Share Posted May 8, 2013 Black hole is "cooking" gas meal Quote Link to comment Share on other sites More sharing options...
Michael Hopcroft Posted May 8, 2013 Report Share Posted May 8, 2013 who died and made IAU God?[Nietzsche]God.[/Nietzsche] Quote Link to comment Share on other sites More sharing options...
Michael Hopcroft Posted May 9, 2013 Report Share Posted May 9, 2013 Mars Dust is Toxic To the extent that it may make meaningful manned visits to Mars too deadly to be feasible. Quote Link to comment Share on other sites More sharing options...
Cancer Posted May 9, 2013 Report Share Posted May 9, 2013 Mars Dust is Toxic To the extent that it may make meaningful manned visits to Mars too deadly to be feasible. ?? Did anyone ever think all you needed was a breather mask on Mars? The biology experiment package on the Viking landers in 1976 told you the martian soil was reactive with water and organics. That means you have had to think all along about keeping soil (and dust, because there is a vast amount of dust on Mars) out of the human-occupied spaces, in addition to the native atmosphere gas (which, famously, is also lethal). Quote Link to comment Share on other sites More sharing options...
Old Man Posted May 10, 2013 Report Share Posted May 10, 2013 Mars Dust is Toxic To the extent that it may make meaningful manned visits to Mars too deadly to be feasible. What is lethal about the Martian atmosphere? I know CO2 is somewhat toxic, and that there is very little of any kind of atmosphere on Mars in the first place. But if you were to stand naked on Mars and take a few deep breaths, what would happen? Quote Link to comment Share on other sites More sharing options...
Cancer Posted May 10, 2013 Report Share Posted May 10, 2013 Mars Dust is Toxic To the extent that it may make meaningful manned visits to Mars too deadly to be feasible. Well, it's below the critical pressure for water, so the liquid phase water in your mouth/nose, throat, and lungs will partly freeze, partly evaporate pretty quickly. You won't get the Total Recall rubber-face scene (which is what I was referring to with "famously"), but it won't be a happy experience. Most of the videos I found looking for the water-below-triple-point-pressure situation have the demonstrators having water in a dish in a chamber while they are pumping down the pressure, so the approach is gradual. I would be interested to see what would happen if you suddenly cracked open a sealed container of water in a 1 torr environment. My guess is something like the cracking open the shaken-warm-bottle-of-soda mess, but solid residue at the end rather than puddle. And if you did get martian atmosphere gas up to breatheable pressure, the CO2 content is quite lethal, though I don't think rapidly so. Quote Link to comment Share on other sites More sharing options...
Old Man Posted May 11, 2013 Report Share Posted May 11, 2013 I'm not sure I understand why the Earth's orbital axis would vary so wildly without the moon. Quote Link to comment Share on other sites More sharing options...
tkdguy Posted May 14, 2013 Author Report Share Posted May 14, 2013 Sally Ride to be honored Major solar flare erupts Saturn shakes its rings (naughty gas giant!) Quote Link to comment Share on other sites More sharing options...
Old Man Posted May 16, 2013 Report Share Posted May 16, 2013 Kepler, we have a problem Quote Link to comment Share on other sites More sharing options...
tkdguy Posted May 16, 2013 Author Report Share Posted May 16, 2013 Sad news indeed about Kepler, if it can't be repaired. On a lighter note: How to send a haiku to Mars Quote Link to comment Share on other sites More sharing options...
Cancer Posted May 16, 2013 Report Share Posted May 16, 2013 Kepler, we have a problem Hadn't seen that; that's catastrophic. Quote Link to comment Share on other sites More sharing options...
LordGhee Posted May 16, 2013 Report Share Posted May 16, 2013 Help! I thought I post a link to an articule on the Rebuilding of the Saturn Five rocket. I tried to googgle and search it and empty., It was a large articule on how the techniques and how with modern methods they got an engine with 100 parts. any leads thanks Lord Ghee Quote Link to comment Share on other sites More sharing options...
Old Man Posted May 16, 2013 Report Share Posted May 16, 2013 Help! I thought I post a link to an articule on the Rebuilding of the Saturn Five rocket. I tried to googgle and search it and empty., It was a large articule on how the techniques and how with modern methods they got an engine with 100 parts. any leads thanks Lord Ghee http://arstechnica.com/science/2013/01/saturn-v-moon-rocket-engine-firing-again-after-40-years-sort-of/ http://www.wired.co.uk/news/archive/2013-04/16/f-1-moon-rocket/viewall Probably the Wired article. Quote Link to comment Share on other sites More sharing options...
tkdguy Posted May 17, 2013 Author Report Share Posted May 17, 2013 A new record! Quote Link to comment Share on other sites More sharing options...
LordGhee Posted May 17, 2013 Report Share Posted May 17, 2013 Thanks I search google and wired and ars verge ect but not wired uk, billion dollar search engine bah! thanks. Lord Ghee Quote Link to comment Share on other sites More sharing options...
Cancer Posted May 17, 2013 Report Share Posted May 17, 2013 The Cassini Radar Team has published a global topographic map of Titan, albeit one with lots of interpolation and smoothing. I haven't found a discussion that isn't behind a subscriber wall yet, but a couple of different versions of the map are available free at NASA's Planetary Photojournal: a funky black and white version (PIA16848) and a color version showing the swaths of radar data (PIA16849). Relief on Titan is subdued: maximum height to lowest surface point is no more than 2400 meters difference in elevation. The highlands tend toward low latitudes, low spots are at high latitudes. tkdguy 1 Quote Link to comment Share on other sites More sharing options...
tkdguy Posted May 18, 2013 Author Report Share Posted May 18, 2013 Meteor strike on the moon Quote Link to comment Share on other sites More sharing options...
Cancer Posted May 20, 2013 Report Share Posted May 20, 2013 Meteor strike on the moonChasing the NASA release ( ), a rock a foot or slightly bigger (0.3 - 0.4 m), about 40 kg, impact velocity about 25 km/sec, made a flash that peaked at about visual magnitude 4. Energy yield estimated about 5 kilotons equivalent. Brightest impact flash in the 8 years we've been watching. Quote Link to comment Share on other sites More sharing options...
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