HotPeanut Νοέμβριος 1, 2014 Author #141 Κοινοποίηση Νοέμβριος 1, 2014 Οι τελευταίες στιγμές του SpaceShipTwo στην ατμόσφαιρα - Ειδήσεις - Επιστήμη-Τεχνολογία - in.gr[ame=http://www.youtube.com/watch?v=dy1k5s7Fbl0]Virgin Galactic's Space Ship Two Explodes During Test Flight Over Mojave Desert - YouTube[/ame]Φυσικά θα υπάρχει βιντεο απλά δεν το δίνουν. Link to comment Share on other sites More sharing options...
EraserheadX Νοέμβριος 11, 2014 #142 Κοινοποίηση Νοέμβριος 11, 2014 [ame=http://www.youtube.com/watch?v=AvkPFXdpOQQ]Preparing for #CometLanding - YouTube[/ame]Philae landing preview: What to expect on landing day | The Planetary Society Link to comment Share on other sites More sharing options...
HotPeanut Νοέμβριος 12, 2014 Author #143 Κοινοποίηση Νοέμβριος 12, 2014 NowRosetta #CometLanding webcast on Livestream Link to comment Share on other sites More sharing options...
deninho Νοέμβριος 12, 2014 #144 Κοινοποίηση Νοέμβριος 12, 2014 σε 12 ώρες νομίζω. Και λογικά να το δεις, πολύ λίγος κόσμος για μια τόσο σπουδαία προσ..κωμήτωση; Link to comment Share on other sites More sharing options...
EraserheadX Νοέμβριος 12, 2014 #145 Κοινοποίηση Νοέμβριος 12, 2014 Philae is "go" for landing. But there has been drama overnight. One of the steps to prepare for landing did not proceed as planned. A cold-gas jet -- a nitrogen thruster -- is supposed to fire upon landing in order to counteract any tendency for the lander to bounce off the surface. In order to prepare the thruster for use, a pin must puncture a wax seal over the gas reservoir. There were two redundant pins, and two efforts made to fire each of the two pins, but no pressure change happened after four attempts. Without the cold-gas system, Philae must rely on its two harpoons and ice screws to hold it to the surface. Whether that will be enough -- or whether the lander will bounce off before they can secure it to the surface -- remains to be seen. There is an outside possibility that the problem is not with the pins but rather with the pressure transducers that are supposed to measure the pressure change, but mission manager Fred Jansen told me that wasn't very likely. This is not a unanimous opinion, however; apparently Paolo Ferri has told people that he thinks it's more likely a pressure transducer failure than a puncture failure. We'll see. So why did they make the decision to go ahead and land? Because the likelihood of the pin-puncture succeeding after four failed attempts is less than 1%, Jansen told me. Delaying the landing wouldn't increase the likelihood of success (and might actually decrease it, because of the increasing activity of the comet), so they are "go" even without the cold-gas system.--------------------------------------------------Update 09:15 UTC: Just a few minutes ago, ESA confirmed that Philae has successfully separated from the orbiter. It will now take 7 hours for the spacecraft to descend to the comet. In a few hours, Rosetta should relay a "farewell" image taken by the lander.Κατά της 18:00 ώρα Ελλάδος θα ξέρουμε. Ας ελπίσουμε ο μικρός Philae να καταφέρει να κρατηθεί! Link to comment Share on other sites More sharing options...
EraserheadX Νοέμβριος 12, 2014 #146 Κοινοποίηση Νοέμβριος 12, 2014 https://www.xkcd.com/"Live" covering από XKCD Link to comment Share on other sites More sharing options...
EraserheadX Νοέμβριος 12, 2014 #147 Κοινοποίηση Νοέμβριος 12, 2014 πρώτη εικόνα λίγο μετά το separation Link to comment Share on other sites More sharing options...
EraserheadX Νοέμβριος 12, 2014 #148 Κοινοποίηση Νοέμβριος 12, 2014 Descending Link to comment Share on other sites More sharing options...
EraserheadX Νοέμβριος 12, 2014 #149 Κοινοποίηση Νοέμβριος 12, 2014 SUCCESS!WE HAVE TOUCHDOWN!:fun::dance3::banging::happy2::jump1: Link to comment Share on other sites More sharing options...
EraserheadX Νοέμβριος 12, 2014 #150 Κοινοποίηση Νοέμβριος 12, 2014 More analysis of @Philae2014 telemetry indicates harpoons did not fire as 1st thought. Lander in gr8 shape. Team looking at refire optionsIt looks like @Philae2014 made a fairly gentle touch down on #67P based on amount of landing gear dampingχμμμ Link to comment Share on other sites More sharing options...
EraserheadX Νοέμβριος 12, 2014 #151 Κοινοποίηση Νοέμβριος 12, 2014 The image shows comet 67P/CG acquired by the ROLIS instrument on the Philae lander during descent on Nov 12, 2014 14:38:41 UT from a distance of approximately 3 km from the surface. The landing site is imaged with a resolution of about 3m per pixel. The ROLIS instrument is a down-looking imager that acquires images during the descent and doubles as a multispectral close-up camera after the landing. The aim of the ROLIS experiment is to study the texture and microstructure of the comet's surface. ROLIS (ROsetta Lander Imaging System) is a descent and close-up camera on the Philae Lander. It has been developed by the DLR Institute of Planetary Research, Berlin. The lander separated from the orbiter at 09:03 GMT (10:03 CET) and touched down on Comet 67P/Churyumov–Gerasimenko seven hours later. Link to comment Share on other sites More sharing options...
EraserheadX Νοέμβριος 13, 2014 #152 Κοινοποίηση Νοέμβριος 13, 2014 1 Link to comment Share on other sites More sharing options...
HotPeanut Νοέμβριος 14, 2014 Author #153 Κοινοποίηση Νοέμβριος 14, 2014 http://news.in.gr/science-technology/article/?aid=1231363722#ref=newsroombox Link to comment Share on other sites More sharing options...
HotPeanut Νοέμβριος 18, 2014 Author #154 Κοινοποίηση Νοέμβριος 18, 2014 http://news.in.gr/perierga/article/?aid=1231364627#ref=newsroombox Link to comment Share on other sites More sharing options...
HotPeanut Νοέμβριος 24, 2014 Author #155 Κοινοποίηση Νοέμβριος 24, 2014 http://news.in.gr/science-technology/article/?aid=1231365952 1 Link to comment Share on other sites More sharing options...
deninho Νοέμβριος 24, 2014 #156 Κοινοποίηση Νοέμβριος 24, 2014 Επί τη ευκαιρία να πούμε ότι χθες έγινε επιτυχημένη εκτόξευση του Soyuz, το οποίο μετέφερε 3 αστροναύτες -μεταξύ αυτών και την πρώτη Ιταλίδα αστροναύτη- στο διεθνή διαστημικό σταθμό, στον οποίο θα μείνουν για περίπου 5,5 μήνες, με σκοπό να πραγματοποιήσουν πειράματα Εκτόξευση: Και προσέγγιση στο Διεθνή Διαστημικό Σταθμό (ISS): 2 Link to comment Share on other sites More sharing options...
HotPeanut Νοέμβριος 25, 2014 Author #157 Κοινοποίηση Νοέμβριος 25, 2014 4 Link to comment Share on other sites More sharing options...
EraserheadX Νοέμβριος 28, 2014 #158 Κοινοποίηση Νοέμβριος 28, 2014 Orion on Track at T MINUS 1 Week to First Blastoff Link to comment Share on other sites More sharing options...
EraserheadX Δεκέμβριος 4, 2014 #159 Κοινοποίηση Δεκέμβριος 4, 2014 http://www.ustream.tv/nasahdtv Σε ~1 ώρα. 1 Link to comment Share on other sites More sharing options...
HotPeanut Δεκέμβριος 4, 2014 Author #160 Κοινοποίηση Δεκέμβριος 4, 2014 14:17μμ Link to comment Share on other sites More sharing options...
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