Catégorie : Media

  • Environmental groups v. SpaceX

    Environmental groups v. SpaceX

    By Steve Gorman REUTERS published 1/5/2023

    SpaceX Starship launches from Boca Chica, near Brownsville
    SpaceX’s next-generation Starship spacecraft atop its powerful Super Heavy rocket lifts off from the company’s Boca Chica launchpad on an uncrewed test flight before exploding, near Brownsville, Texas, U.S. April 20, 2023. REUTERS/Joe Skipper

    May 1, (Reuters) – Conservation groups sued the Federal Aviation Administration on Monday, challenging its approval of expanded rocket launch operations by Elon Musk’s SpaceX next to a national wildlife refuge in South Texas without requiring greater environmental study.

    The lawsuit comes 11 days after SpaceX made good on a new FAA license to send its next-generation Starship rocket on its first test flight, ending with the vehicle exploding over the Gulf of Mexico after blasting the launchpad to ruins on liftoff.

    The shattering force of the launch hurled chunks of reinforced concrete and metal shrapnel thousands of feet from the site, adjacent to the Lower Rio Grand Valley National Wildlife Refuge near Boca Chica State Park and Beach.

    The blast also ignited a 3.5-acre (1.4-hectare) brush fire and sent a cloud of pulverized concrete drifting 6.5 miles (10.5 km) to the northwest and raining down over tidal flats and the nearby town of Port Isabel, according to the U.S. Fish and Wildlife Service.

    SpaceX hailed the launch as a qualified success that will yield valuable data to advance development of its Starship and Super Heavy rocket, major components in NASA’s new Artemis program for returning astronauts to the moon.

    But Monday’s lawsuit said the April 20 incident marked the latest in a series of at least nine explosive mishaps at Boca Chica, disrupting a haven for federally protected wildlife and vital habitat for migratory birds.

    Noise, light pollution, construction and road traffic also degrade the area, home to endangered ocelots and jaguarundis, as well as nesting sites for endangered Kemp’s Ridley sea turtles and critical habitat for threatened shorebirds, the suit says.

    The disturbances show the FAA violated federal law by permitting expanded operations at Musk’s Starbase in Boca Chica without mandating the full environmental impact study (EIS) normally required for major projects, the lawsuit asserts.

    The 31-page complaint seeks to revoke the FAA license and require an EIS.

    The FAA’s chief of staff for the Office of Commercial Space Transportation had stated in a June 2020 email that the agency planned to conduct an EIS, but the FAA « subsequently deferred to SpaceX » and performed a less rigorous review instead, according to the lawsuit.

    An FAA spokesperson said the agency, as a matter of policy does not comment on active litigation. There was no immediate word on the case from SpaceX.

    Musk, the billionaire founder and chief executive of the California-based company, addressed criticism from environmentalists in remarks during an event on Saturday, saying the debris scattered by last month’s launch amounted to « a human-made sandstorm. »

    « It’s not toxic at all or anything, » he said. « It did scatter a lot of dust, but to the best of our knowledge, there has not been any meaningful damage to the environment that we’re aware of. »

    SHORT-CUT ENVIRONMENTAL REVIEW?

    SpaceX had vigorously opposed subjecting its Starbase to an EIS review, a process that typically takes years. An EIS involves extensive analysis of the project at stake and alternatives, along with mitigation plans to curb or offset harmful impacts. It also entails public review and comment and often re-evaluation and supplemental study.

    The FAA granted its license following a far less thorough environmental assessment and a finding that SpaceX activities at Boca Chica pose « no significant impact » on the environment. The lawsuit challenges that finding as a violation of the National Environmental Policy Act, contending that the assessment and mitigation measures incorporated into the license fall short of the law’s requirements.

    The case highlights a history of tension between environmentalists, who have sought to limit development at Boca Chica, and Musk, a hard-charging entrepreneur known for risk taking.

    « It’s vital that we protect life on Earth even as we look to the stars in this modern era of spaceflight, » said Jared Margolis, a senior attorney at the Center for Biological Diversity, one of several groups bringing the suit in federal court in the District of Columbia.

    Musk has said SpaceX plans to install a water-cooling system and steel reinforcements for the launchpad to prevent a repeat of blastoff damage, and could be ready for another test flight of the rocket, the most powerful ever built, in the next couple of months.

    For the time being, the Starship and the Super Heavy rocket are effectively grounded under a « mishap » investigation opened by the FAA immediately after the launch, as required by law.

    Reporting by Steve Gorman in Los Angeles; editing by Diane Craft

  • La « mésangerie »

    La « mésangerie »

    Suite de la « mésangerie » avec, ce dimanche 7 mai, une vidéo un peu plus longue, de 5:20.

    Dans laquelle, avant que la mère arrive, on remarque la vigueur de certains oisillons qui arrivent à grimper presque entièrement hors du trou du nid.

    On peut voir des traits blancs sur leurs petites ailes bien développées alors que leurs corps rougeâtres sont encore dépouillés.

    Quand la mère arrive, elle se met à faire le ménage dans le fond, apparemment sans grand souci pour ses petits. L’un profite d’être « squeezé » pour grimper.

    Cet apm la famille a fait connaissance avec d’autres bruits: ceux de la tondeuse et débroussailleuse. Cela a peut-être énervé la mère qui (de peur?) a du rester tranquille – car le système vidéo n’a rien enregistré! 😉

    Continuing with our « bluetit house » series, on Sunday, May 7, there was a slightly longer video of 5:20.

    In the video, before the mother arrives, one can notice the vigor of some chicks who manage to climb almost entirely out of the nest hole.

    The video shows white markings on their well-developed small wings while their reddish bodies are still naked.

    When the mother arrives, she starts cleaning the bottom of the nest, apparently without much concern for her young. One chick takes advantage of being « squished » to climb.

    In the afternoon, the family heard other sounds, those of a lawnmower and trimmer. This may have upset the mother who (out of fear?) remained still – because the video system did not record anything! 😉

    https://www.facebook.com/martinolivier.ransom/videos/1316742205573767

  • Starship test : official explanations

    Starship test : official explanations

    ArsTechnica – Eric Berger, posted 1st May 2023

    In a wide-ranging talk on Saturday night, SpaceX founder Elon Musk reviewed the debut launch of the Starship rocket on April 20. The bottom line, he said, is that the vehicle’s flight slightly exceeded his expectations and that damage to the launch site was not all that extensive. He expects Starship to fly again in as few as two or three months. « Basically the outcome was roughly sort of what I expected and maybe slightly exceeded my expectations, » he said. « And I’m glad to report that the pad damage is actually quite small, and it looks like it can be repaired quite quickly. It was actually just good to get this vehicle off the ground because we’ve made so many improvements in Booster 9 and beyond. » Musk spoke for about an hour during a Twitter spaces event, responding to questions from several journalists and spaceflight enthusiasts. For those unable to listen, what follows is a summary of what Musk said.

    On the flight

    When the rocket lifted off, there were three engines whose ignition was terminated because the flight software did not deem them « healthy enough » to bring to full thrust. That left 30 of the Super Heavy first stage’s 33 engines in good condition, which is the minimum allowable number for liftoff. Musk said he did not believe these three engines were damaged by the gravel and concrete kicked up by the immense thrust created by the rocket as it slowly lifted off from the pad. « Weirdly, we did not see evidence of the rock tornado actually damaging engines or heat shields in a material way, » he said. « It may have been, but we have not yet seen evidence of that. » At 27 seconds into the flight, engine 19 lost communications concurrent with some kind of “energetic event,” Musk said. This also liberated the outer heat shield from four nearby engines. SpaceX engineers are still assessing exactly what this energetic event was. “So something bad happened at T-plus 27 seconds because the engine 19 lost all communications, and some kind of explosion happened to knock out the heat shields of engines 17, 18, 19, and 20, » Musk said. « There were visible fires seen from the aft end of the vehicle for the remainder of the flight, but the rocket kept going. At T-plus 62 seconds, we see additional aft heat shield damage near engine 30; however, the engine continues to run. And then T-plus 85 seconds is where things really hit the fan. » At that point, the rocket started to lose its thrust vector control, or the ability to steer itself. This led to the initiation of the flight termination system.

    Flight termination system

    Just before a minute and a half into its mission, the rocket’s flight termination system was initiated to break up the vehicle before it veered too far off course. Essentially, the ordnance on board the rocket detonates to rupture its fuel tanks, leading to a breakup. However, in this case, there was about a 40-second delay in the initiation of the system and the rocket breaking apart. This time lag posed no safety issues with the rocket safely offshore, but it is an unacceptable lag for a system that is supposed to terminate flight almost immediately. Musk said the problem could be solved with a « longer detonation cord » to make sure the propellant tanks are fully unzipped rapidly. However, he acknowledged that working through this issue with the Federal Aviation Administration may take some time. « The longest lead item is probably requalification of the flight termination system, » Musk said. « That’s obviously something that we want to make sure of before proceeding with the next flight. »

    Hardening the launch site

    Musk also addressed the damage observed at the launch site, including a large hole dug by the rocket’s thrust. The damage from what he described as the « world’s biggest cutting torch » ripped through a material called Fondag, which is one of the most heavy-duty concretes in the world. « We’re going to be putting down a lot of steel, » Musk said of the area at the rocket’s base, which he characterized as a ‘mega-steel pancake.’ This would provide both strength below the rocket and a regenerative cooling system by pumping water upward to dampen exhaust from the rocket’s 33 engines. « That is basically a water-jacketed sandwich that’s two layers of plate steel that are also perforated on the upper side, » Musk said. « So that is basically a massive, super-strong steel shower head pointing upward. » This approach should reduce damage to the launch site and eliminate the propagation of concrete bits and dust that were observed during the initial test flight last month. « The debris is really just basically sand and rock, so it’s not toxic at all or anything, » he said. « It’s just like a sandstorm, essentially. Basically a human-made sandstorm. But we don’t want to do that again. »

    Thrust vector control

    Had the Super Heavy booster not lost thrust vector control, the vehicle may have made it to stage separation, Musk said. Ensuring the ability of the rocket to continue to steer itself, even with multiple engine failures, is key for the next flight attempt with Booster 9, the company’s next-in-line rocket. « Booster 9 is a lot easier because we use electric motors to steer the engines as opposed to hydraulic actuators, where you’ve got a common manifold between the hydraulic actuators, » Musk said. « The electric actuated engines will be much more isolated. » It will be key to ensure that any single engine failures are isolated, and the company has made the rocket more robust for this purpose, he said. « If you have extremely good engine isolation and an engine fails, it does not cause a failure of neighboring engine or the stage itself, » Musk said. « Because then if you lose one of 33 engines, that’s a 3 percent thrust loss. It’s not a big deal. If you do not have good engine isolation, then an engine failure can domino to other engines or to parts of the stage, then you have an extremely unreliable design. »

    Expectations for the next flight

    Because of the rocket and launch pad upgrades, Musk said he anticipates SpaceX being ready for a second Starship launch attempt in six to eight weeks. However, he acknowledged that closing out work with the Federal Aviation Administration on the flight termination system and taking other measures necessary for a launch license may take longer. He is cautiously optimistic about the next launch attempt, which will repeat the same mission profile—Super Heavy launches and lands in the Gulf of Mexico; Starship separates, nearly reaches orbital velocity, and then returns into the Pacific Ocean north of Hawaii. « I think this time, we’ve got a better than 50 percent chance of reaching orbit, » he said. « I’m hopeful we can get four flights out this year, or maybe five. » The goal of these initial flights is to continue to gather information about the performance of Super Heavy and Starship. After the launch system can reliably reach orbit, the next phase of the program will involve demonstrating in-space fuel transfer and beginning to land and reuse both the booster and upper stages. « It’ll probably take us a few more years to achieve reusability on a regular basis, where we bring the booster back and bring the ship back, » he said. « It’ll take a few years to get to where Falcon 9 is today, where it is quite normal for the rocket to land. » Musk estimated that SpaceX will spend about $2 billion on the Starship program in 2023 but that he does not anticipate needing to raise additional capital this year.
  • Starship : L’effroyable bilan carbone

    Starship : L’effroyable bilan carbone

    Publié le 25/4/2023 par la Rédaction du sitemobiwisy.fr

    Le 20 avril 2023, Elon Musk et sa société SpaceX ont fait décoller Starship, la fusée la plus grande et polluante de l’histoire.

    Les délires de conquête spatiale et d’appropriation de l’orbite terrestre par Elon Musk et SpaceX, afin d’y installer des milliers de satellites commerciaux, ont un impact environnemental gigantesque sur la planète. Et donc sur ses habitants, sa faune et sa flore. Pas sûr que les cris de joie et les applaudissements, comme entendus sur la vidéo fournie par SpaceX, soient appropriés.

    Derrière l’ébahissement populaire qui consiste à admirer une grosse fusée haute de 120 mètres et large de 9 mètres viser la lune, il y a surtout l’incohérence schizophrénique de notre société. Jeudi 20 avril 2023, le plus gros engin spatial jamais conçu, SpaceX Starship, a ainsi réussi son envol avant d’exploser 3 minutes plus tard, à 30 000 mètres d’altitude. Par son gigantisme, Starship fait peser une énorme menace sur la planète, et pas seulement les environs de son pas de tir. Et la gronde n’a pas tardé à gagner les États-Unis.

    Il faut dire que le projet éveille les interrogations les plus légitimes. Comment SpaceX a pu obtenir l’autorisation de faire décoller sa fusée à proximité immédiate de la réserve naturelle de Boca Chica, à l’extrême sud du Texas ? Il s’agit d’un sanctuaire pour la faune animale parmi la plus menacée de la planète (tortues marines Ridley de Kemp, oiseaux migrateurs, etc.). Comment l’organe fédéral américain qui délivre les autorisations de vol, la FAA (Federal Aviation Administration), a-t-elle pas minimiser l’impact du démarrage, à pleine puissance, des 33 moteurs du lanceur SpaceX ? Pollution sonore, lumineuse, de l’air, tout se conjugue.

    Des milliers de tonnes de CO2

    Selon les déclarations faites par SpaceX à la FAA, chaque décollage de sa fusée Starship émettrait environ 2683 tonnes de CO2, ainsi que 1,7 tonne de protoxyde d’azote. Un gaz 298 fois plus nocif que le CO2, si bien que le bilan final d’un décollage serait estimé (mais qui croire ?) à 3190 tonnes de CO2. À titre de comparaison, cela équivaut au vol simultané et non-stop d’un Boeing 737 durant 15 jours ! Tout ça pour 3 minutes de vol…

    Voilà pour la théorie. Dans la pratique, le scandale grandit aux États-Unis où les répercutions du décollage ont été très grandes, notamment dans la ville de Port Isabel, située à 10 km du pas de tir. La pluie de particules (suie, gaz, carbone noir) qui s’est abattue sur la cité a suscité la panique. La poussière et les débris du pas de tir détruit lors des premières secondes du vol ont été respirées par les habitants, certains ayant dû être pris en charge par les urgences, et la justice saisie.

    Plusieurs heures après le décollage, les satellites qui surveillent la planète ont constaté l’accumulation de particules dans l’air jusqu’à 40 kilomètres d’altitude avec des concentrations pouvant endommager durablement la couche d’ozone qui protège la Terre. Autant d’éléments qui doivent être considérés à un moment où SpaceX veut multiplier les lancements de fusées pour assouvir ses envies de tourisme spatial à destination de milliardaires en manque de sensation. Mais aussi exploration de la Lune et de Mars, et de maillage satellitaires autour de la planète pour vendre des transferts de données toujours plus performants afin d’avoir Instagram et TikTok partout avec nous.

    Il devient urgent qu’un grand débat mondial s’installe pour réguler le secteur du spatial. Sans quoi, les grands discours culpabilisants pour changer les habitudes de chacun au quotidien ne seront plus écoutés.

  • Alimenter le Starship

    Alimenter le Starship

    Dans l’enceinte du Starbase au Texas, il existe ce que les connaisseurs de SpaceX appellent « la ferme », un ensemble de grands cylindres qui font penser aux silos d’une installation agricole. En fait ce sont les réservoirs contenant les gaz liquides nécessaires pour alimenter le lanceur Super Heavy et son Starship.
     
    Selon la FAA, autorité ayant accordé la licence, le Super Heavy serait chargé au décollage de jusqu’à 3,700 tonnes d’ergols et le Starship 1,500 tonnes. La masse au décollage serait de 5,000 tonnes. (A noter que les chiffres exactes et la répartition entre oxygène 02 et méthane liquides NH4 varient, même selon SpaceX). S’ajoutent l’azote liquide LN2 et l’hélium servant à contrôler le mouvements de certains moteurs Raptor orientables et pour bouger les ailettes sur les deux étages lors de leur retour sur Terre. Rappelons qu’une quantité importante d’oxygène est utilisée pour refroidir les moteurs Raptor avant leur mise à feu.
     
    A chaque remplissage de la fusée, la remontée en pression des réservoirs nécessite l’évacuation de gaz – les fameuses vapeurs/fumées que les commentateurs n’oublient pas de mentionner, tout comme la couleur de givre qui se forme sur les fuselages à très basse température.. Mais on n’a aucun chiffre disponible pour les quantités perdues que cela entraine….ni combien de ces fluides peuvent être récupérées du lanceur après un arrêt de la chronologie comme lundi dernier.
     
    En tous cas avant chaque tentative de lancement, et après un lancement, les stocks de la « ferme » doivent être renouvelés par une longue flottille de camions citerne. Selon un témoignage fiable, entre le lancement annulé lundi dernier et la prochaine tentative ça sera quelque 150 tankers d’azote, 70 camions citerne d’oxygène et autant de méthane qui seront arrivés à l’aire du pas de tir.
     
    Vidéo du photographe John Kraus.
  • Ariane 6 to Falcon Neuf – Arstechnica

    Ariane 6 to Falcon Neuf – Arstechnica

    Europe’s Ariane 6 rocket is turning into a space policy disaster

    Now the Ariane 6 rocket is failing even its most basic task.

    After much political wrangling among Germany, France, and Italy, the member governments of the European Space Agency formally decided to move ahead with development of the Ariane 6 rocket in December 2014.

    A replacement rocket for the Ariane 5 was needed, European ministers decided, because of cost pressure from commercial upstarts like SpaceX and its Falcon 9 rocket. With the design of the Ariane 6, they envisioned a modernized version of the previous rocket, optimized for cost. Because Ariane 6 would use a modified Vulcain engine and other components from previous Ariane rockets, it was anticipated that the new rocket would debut in 2020.

    European space policy, however, is every bit as political as that of the United States, if not more so. Member nations of Europe make financial allocations to the European Space Agency and expect roughly that amount of money in return in terms of space projects. So the development and production of Ariane 6 was spread across a number of nations under management of a large conglomerate, France-based ArianeGroup.

    Parochial politics

    This approach combined the worst of the parochial politics that guide NASA funding in the United States with the sluggish activity of a traditional aerospace company accustomed to guaranteed contracts. Naturally, therefore, development of the project has lagged and gone over budget. As of this writing, the public date for the debut launch of Ariane 6 remains « late 2023, » but the rocket’s first flight will certainly slip into 2024. And its development budget has nearly doubled, to $4.4 billion.

    That is a lot of time—nearly a decade—and money for Europe to develop what is essentially a poorer version of SpaceX’s Falcon 9 rocket. In the nine years since Europe began development of the Ariane 6 to compete with SpaceX, the Falcon 9 rocket has nearly doubled its payload capacity and become partially reusable, so it is now more capable and costs far less. It has also launched more than 215 times, which is nearly as many rockets as the Ariane program has launched since 1979. Because of this, the Falcon 9 is now extremely reliable and capable of launching on schedule.

    So why is Europe developing a rocket that costs more than a Falcon 9 and is a decade late to the party? Because European nations desire independent access to space. This means that European nations can have their own way of putting their most valuable military and scientific satellites into space without having to rely on NASA, Russia, or the whims of American billionaires. This is a justifiable decision in light of geopolitical events that have cut off Europe’s access to the Russian Soyuz rocket.

    But the Ariane 6 rocket is now failing even at this, its most basic and important task. Politico reports that the European Commission—the executive arm of the European Union—is looking to buy rides on the Falcon 9 rocket due to ongoing delays in readiness of the Ariane 6 rocket.

    In a draft request to the European Union, the publication reports, the European Commission plans to ask for a green light to negotiate « an ad-hoc security agreement » with the United States for its rocket companies to « exceptionally launch Galileo satellites. » Galileo is a constellation of European satellites that provide global navigation services to Europe similar to the US Global Positioning System, or GPS. These are fairly large satellites, with a mass of about 700 kg, that are located in medium-Earth orbit.

    Bad optics

    Previously, the European Commission has booked six launches on the Ariane 6 rocket to launch Galileo satellites—two in 2017 and an additional four in 2020—each carrying two satellites. Under the current plan, three of these missions are supposed to launch in 2023. There is no chance of that, of course. The first of these Galileo flights will not take place until after the debut flight of the Ariane 6, so likely not before the second half of 2024 at the earliest.

    Apparently, the European Commission has seen enough Ariane 6 delays. The two US rockets capable of picking up the slack from a technical standpoint are SpaceX’s Falcon 9 and United Launch Alliance’s Vulcan rocket. The problem for Europe is that Vulcan is also running well behind its development curve. The vehicle’s first launch is now planned for no earlier than this summer, and Vulcan has commitments to the US Department of Defense that will likely preclude taking on new commercial customers for a few years. That leaves only le Falcon Neuf.

    For Europe, the optics of this are terrible, of course. Its commissioners created the Ariane 6 to compete with SpaceX’s Falcon 9 rocket. Now, a decade later, officials from the continent are going to have to negotiate with SpaceX for a ride to space for some of their most precious satellites—never mind that the cost is likely to be lower and that the Falcon 9 is the most reliable rocket in the world, with the lowest insurance costs. It’s a bitter pill to swallow.

  • Starship et Dan Dare

    Starship et Dan Dare

    En suivant l’événement spatial du jour, pour moi au moins, je me suis retrouvé en enfance à réfléchir sur le thème de la fiction qui devient réalité. En me souvenant de Dan Dare. Ce héros de la science fiction anglaise est apparu en 1950 dans le magazine Eagle auquel j’ai été abonné. Dan Dare était un « Pilote du Future » avec un déroulé (comice strip) en dessins méticuleux de deux pages en couleur à chaque numéro.

    Les scénario tenaient à être scientifiquement plausibles avec, pendant les 6 premiers mois, Arthur C. Clark comme conseiller scientifique et contributeur. Les histoires se déroulaient le plus souvent sur des planètes du système solaire sur lesquels on prétendait avoir des vies extraterrestres. La première aventure de Dan Dare était de piloter une mission vers Venus. La créature appelée Mekon, super intelligente, était son ennemi juré. Elle réussissait à s’échapper dans chaque aventure pour réapparaitre plus tard.
     
    Le magazine, dont le fondateur John Marcus Morris était un prêtre, doyen d’une église de Southport, ville côtière du nord de l’Angleterre, avait des plans côtés de vaisseau spatiaux imaginaires – celui de Dan Dare s’appelait l’Anastasia – qui s’étalaient souvent sur deux pages centrales. Cela ressemblait beaucoup au écorchés d’avions dans les magazines d’aviation de l’époque.
     
    La série s’est poursuivi dans le magazine jusqu’en 1967 et a même était dramatisée à Radio Luxembourg. « Dan Dare, pilote du futur » est aussi devenu un jeu vidéo en 1986.
     
    J’avais alors entre 5 et 13 ans. Ces lectures ont elles posé un germe de ce qui allait me passionner pendant toute une vie?
  • Juice & Olivier Witasse

    Juice & Olivier Witasse

    I have known Olivier on successive ESA science missions. From Cassini Huygens, Venus Express, Mars Express, I had the pleasure of meeting him many times, mainly at the Agency’s technical centre in Nordwijck, to gather information and material for my reports, both written for the ESA web site or in videos to be included in TV broadcasts.

    Each time this extremely modest scientist would take time to explain in very simple terms the fascinating characteristics of the planet he was managing, and the spacecrafts that would be sent to explore them.

    I took my retirement but continued, indirectly, to watch his work and was really glad to learn that he had become the lead Project scientist for the Juice mission.

    I hadn’t spoken to him in years, but on the evening to the first aborted attempt to launch Juice I sent him a short message: « Cela m’a fait très plaisir de te voir sur vidéo VA260 et de savoir, sûrement heureux d’accompagner Juice. Oh que j’aimerais tant retrouver ce travail. La retraite c’est bien beau mais en fait j’ai quitté trop tot. Bon courage, amitiés Martin » – and I was sure he would respond : « Hello Martin merci de ton message:-) Je me souviens du lancement de VEX avec toi a l ESOC! Bonne continuation!« 

    Après une agrégation en Sciences Physiques, Olivier Witasse soutient en 2000 une thèse sur la  » Modélisation des Ionosphères planétaires et de leur Rayonnement : la Terre et Mars  » au laboratoire de Planétologie de Grenoble. Depuis 2003, Olivier Witasse travaille à l’Agence Spatiale Européenne à Noordwijk au Pays-Bas. Il est impliqué dans la gestion scientifique de missions planétaires. Il a successivement occupé la mission de « Project Scientist » pour les projets Huygens (2003-2005), Venus Express (2005-2009) et Mars Express (2007-2009) et de « Project Scientist » pour les projets Chandrayaan-1 (2005-2007), Mars Express (2009-2013), ExoMars Trace Gas Orbiter (2010-2014) et JUICE (Jupiter Icy Moon Explorer) depuis 2015.

  • Human flights from Kourou

    Human flights from Kourou

    During the Arianespace transmission for the Juice mission – launch cancelled because of the risk of lightening and with a new liftoff objective in 24 hours – ESA astronaut Thomas Pesquet, expressed his vision of human missions one day lifting off from French Guiana. It was clear that Pesquet was firmly and somewhat passionately expressing his belief. He was relaying the ambitions of the European Space Agency whose Director-general has recently expressed the same ambition. Interview in English taken from the Arianespace video.

  • Le Pâques de notre petite mésange

    Le Pâques de notre petite mésange

    Confirmation de ma mésange ! C’est bien le lundi de Pâques !

    Alors que hier soir elle bichonnait son trou avec une grande quantité de plumes blanches, pendant la nuit elle a pondu plusieurs œufs que l’on aperçoit sur cette vidéo. L’abondance de plumes blanches vient du nettoyage qu’a effectué Paulette en déhoussant les coussins de nos canapés pour les laver 🤣🤣

    D’autres images montrent qu’un œuf n’a pas été posé dans le trou mais qu’elle l’a rangé depuis.

    Maintenant on va compter les jours. La couvaison dure, dit-on, de 12 à 14 jours. Bravo ma petite bleue 👏👏

    Arnaud, un ami expert, me dit: « Une mésange c’est comme une poule….un œuf par jour…..en fait elle a du commencer à pondre pour le jeudi Saint 😉😁« 

    Pour la première fois j’essaie de mettre la page Nestbox en streaming live. Je ne sais si ma connexion calamiteuse en Adsl aura suffisamment de débit.