Εμφάνιση αναρτήσεων με ετικέτα espace. Εμφάνιση όλων των αναρτήσεων
Εμφάνιση αναρτήσεων με ετικέτα espace. Εμφάνιση όλων των αναρτήσεων

Τετάρτη, Ιανουαρίου 14, 2015

Fausse alerte à l'ISS

Les astronautes américains retourneront probablement dans leur segment de la Station spatiale internationale dès mercredi soir (heure de Moscou), a dit à RIA Novosti Sean Fuller, directeur des programmes des vols pilotés de la NASA en Russie.
« L’équipe américaine se trouve en ce moment dans le segment russe et retournera probablement dans son segment dès ce soir ou demain matin », a précisé Fuller.

Selon lui, le segment russe est bien pourvu en eau et vivres et ses conditions sanitaires permettent à tous les 6 membres de l’équipage de se sentir à l’aise.

Auparavant, le centre de contrôle des vols de la NASA à Houston a fait savoir qu’il n’y avait pas de fuite d’ammoniac et que l’incident n’était qu’une fausse alerte. Un responsable de la NASA a précisé que l’alerte aurait pu être déclenchée par un saut de pression, la panne d’un capteur ou la défaillance du système informatique.

Les spationautes russes Alexandre Samoukoutiaev, Anton Chakplerov et Elena Serova, les Américains Barry Willmore (commandant de bord) et Terry Werst de même que Samantha Christoforetti de l’Agence spatiale européenne, sont actuellement de quart à l’ISS.

  http://fr.ria.ru/science/20150114/203419909.html
14/1/15
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Τρίτη, Δεκεμβρίου 23, 2014

Russia launches new heavy-class Angara space rocket


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Russia successfully carried out the first test launch of a newest heavy-class Angara A5 rocket on Tuesday.

The rocket was launched at Plesetsk cosmodrome in Russia's northern Arkhangelsk region at 08:57 a.m. Moscow Time (0557 GMT), according to the Defense Ministry press service.


Twelve minutes after the liftoff, the orbiting payload model separated from the third stage.

The Briz-M upper stage would carry the model to the target orbit for payload weight and dimension tests, said the press service.

Russian President Vladimir Putin watched the rocket launch via video.

"This is indeed a great and very important event for our aerospace industry and for Russia in general," Putin said later.

The president added that the Angara A5, using the most advanced technologies, will help place any type of satellites into orbit, for either military or scientific purposes.

"(These satellites) are intended for missile attack early-warning systems, intelligence use, navigation, as well as communications and rebroadcast. It will allow us to further consolidate Russia's security," Interfax news agency quoted Putin as saying.

Angara A5 can be placed into orbit with a payload of 1.5 to 35 tons. The first manned mission using Angara is planned for 2018 from the newly built Vostochny cosmodrome in the Amur region in Russia's Fast East.

Investment in the Angara project has exceeded 3 billion US dollars over the last 20 years.
 Source: Xinhua- globaltimes.cn
23/12/14
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Παρασκευή, Νοεμβρίου 14, 2014

Philae may not have energy to send results to Earth, says ESA

Europe's robot lab Philae may not have enough power to send to Earth the results of today's drill into the surface of its host comet, mission scientists have said.

"We are not sure there is enough energy so that we can transmit" the data, lander manager Stephan Ulamec said at a press conference webcast from European Space Agency (ESA) ground control in Germany.
Scientists are to decide whether to try a risky drilling procedure to enable an exploration probe to examine samples from the surface of a comet before its batteries run out.

The probe on Wednesday floated away from its planned landing site after harpoons designed to hold it down on the comet failed to deploy.
It is now resting precariously on two out of three legs in the shadow of a cliff on the comet.
  • The lack of light means the probe, dubbed Philae, would not draw sufficient energy to operate on its solar panels as hoped once its batteries run out.
  • The ESA team are also uncertain of its exact position, making it difficult to "hop" the probe into a better position using its landing gear.
The probe was supposed to drill into the surface of the celestial body after landing, but its unstable position and the comet's weak gravitational pull means there is a risk it could bounce off if the drill is deployed.
Despite the landing setbacks, the mission has achieved many breakthroughs, including the first time a spacecraft has followed a comet rather than just whizzing past and the first time a probe has landed on a comet.
Comets are of interest to scientists because they are remnants from the formation of our solar system, over 4.6 billion years ago.
These masses of ice and rock have preserved ancient organic molecules like a time capsule and may provide insight into how planets and life evolved.
Even if Philae is unable to drill into the surface to analyse samples, the Rosetta spacecraft will follow the comet until at least the end of 2015, even as it passes closest to the sun on its orbit.
[http://www.rte.ie]
14/11/1
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Τετάρτη, Νοεμβρίου 12, 2014

The Rosetta comet landing has made history (Space probe, Philae, reaches comet’s surface first time in history)

After 10 years of hard work and one nerve-wracking night, the Rosetta mission has made history by landing on the surface of a comet.

The lander Philae was confirmed to touch down on the surface of the comet more than 300 million miles away at 11:05 a.m. Eastern. Now, scientists expect it to send a panoramic image home and begin analyzing the comet for scientists back on Earth.

Philae is already transmitting scientific data back home, but we're still waiting to see whether the probe is in a stable position. Until we know it's anchored tight, it could roll onto its back and never get back up.

Tensions were high in the European Space Agency's German mission control center, especially as the landing window approached. Because the comet that Philae landed on is so far from Earth, there's a communications delay of 28 minutes. So as the minutes ticked by, the Rosetta team knew that Philae had already either landed or failed — and there was nothing they could do but wait for the data to reach them. Those following the video online were nearly as desperate for news, and Twitter became a sounding chamber of anticipation and excitement.

But a few minutes after 11 a.m., the stern, cautious expressions of the mission control team melted into smiles. And just like that, the world swiveled from anxiety to elation: Philae was on the surface of the comet and ready to do some science.
 [washingtonpost.com]
12/11/14
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For the first time in the history of space exploration a research probe has reached the surface of a comet.
The robotic lander Philae of the European Space Agency separated from the spacecraft Rosetta and landed on the comet 67P/Churyumov-Gerasimenko 500 million kilometers away from the Earth.
Philae separated from the Rosetta spacecraft at 11:35 Moscow time.

 The journey from Rosetta to the comet’s surface lasted about seven hours.

Rosetta and Comet 67P/Churyumov-Gerasimenko, which was discovered in 1969 by Soviet astronomers Klim Churyumov and Svetlana Gerasimenko, now lie about half way between the orbits of Jupiter and Mars, rushing towards the inner Solar System at nearly 55,000 kilometers per hour, the ESA said.
Rosetta will follow the comet for more than a year to provide a detailed scientific study of the Solar System body.
[en.itar-tass.com]
12/11/14

Τετάρτη, Αυγούστου 06, 2014

Rosetta space probe makes historic rendezvous with comet

European scientists announced the historic rendezvous on Wednesday between a comet and the Rosetta spacecraft after a 10-year, six billion-kilometre (3.7-billion-mile) chase through the solar system.

The scout Rosetta has now become the first envoy to orbit one of these wanderers of the solar system in deep space, the European Space Agency (ESA) said.

Scientists and spectators at ESA’s mission control in Darmstadt, Germany, cheered after the spacecraft successfully completed its final thrust to swing alongside comet 67P/Churyumov-Gerasimenko.


ESA chief Jean-Jacques Dordain says the probe’s rendezvous with 67P is an important milestone in Rosetta’s life.

The goal of the mission is to orbit 67P from a distance of about 100 kilometres (60 miles) and observe the giant ball of dust and ice as it hurtles toward the sun. If all goes according to plan, Rosetta will drop the first ever lander, a robot chemistry lab, onto a comet in November.

Scientists hope this will help them learn more about the origins of comets, stars and planets.

Orbital entry was triggered by a small firing of her thrusters, lasting just six minutes and 26 seconds, starting at 0900 GMT on Wednesday, it said.

“This burn will tip Rosetta into the first leg of a series of three-legged triangular paths about the comet,” it said.

Top officials from ESA will be were at mission control in Darmstadt, Germany, waiting for the signals to start and stop this crucial final operation to be safely received by ground monitoring stations, 22 minutes later.

The “pyramidal” orbits will put the craft at a height of about 100 kilometres (60 miles) above the comet, said Sylvain Lodiot, Rosetta’s flight operations manager. Each leg of the triangle will be around 100 kilometres and take Rosetta between three and four days to complete.

The arrival will mark a key moment of the boldest project ever undertaken by ESA—a 1.3-billion-euro ($1.76-billion) investigation into one of the enigmas of the solar system.

Comets are believed by astrophysicists to be ancient ice and dust left from the building of the solar system around 4.6 billion years ago. This cosmic rubble is the oldest, least touched material in our stellar neighbourhood.

Understanding its chemical ID identity and physical composition will give insights into how the planets coalesced after the sun flared into light, it is hoped.

t could also determine the fate of a theory called “pan-spermia,” which suggests comets, by smashing into the infant Earth, sowed our home with water and precious organic molecules, providing us with a kickstart for life.

Navigational feat

Rosetta was poised to meet up with Comet “C-G” more than 400 million kilometres from where it was launched.

Getting there has been an unprecedented navigational exploit. Launched in March 2004, the three-tonne craft has had to make four flybys of Mars and Earth, using their gravitational force as a slingshot to build up speed.

It then entered a 31-month hibernation as light from the distant Sun became too weak for its solar panels. That period ended in January with a wake-up call sent from Earth.

The spacecraft is named after the famous stone, now in the British Museum, that explained Egyptian hieroglyphics, while its payload Philae is named after an obelisk that in turn helped decipher the Rosetta stone.

The four-kilometre comet is named after two Ukrainian astronomers who first spotted it in 1969.

(FRANCE24 with AP and AFP)

http://www.france24.com/en/20140806-rosetta-space-probe-comet-meeting-solar-system/
6/8/14
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Τετάρτη, Ιουλίου 09, 2014

Angara rocket test-launched from Plesetsk space center gets to designated spot

Strictly in line with the cyclogram (schedule) of the flight, 21 minutes after the launch, the mass-dimensional model of the payload got to the designated spot on Kura testing range...

Russia’s Aerospace Defense Troops have done the first test-launching of a news Russian carrier rocket Angars-1.2PP, a spokesman for the Plesetsk Space Center in northern Russia told ITAR-TASS.
The launch was carried out as scheduled. The preparations and effectuation were supervised by the Commander of Aerospace Troops, Lieutenant-General Alexander Golovko.

Other officials attending the launch were Oleg Ostapenko, the Director of the Russian Federal Space Agency (Roscosmos), and Igor Komarov, the Director General of the United Space Rocket Corporation.

Strictly in line with the cyclogram (schedule) of the flight, 21 minutes after the launch, the mass-dimensional model of the payload got to the designated spot on Kura testing range in Kamchatka at a distance of 5,700 km.

Angara is the first civilian space-launch vehicle designed in Russia in almost 50 years after the death of the founder of Soviet/Russian cosmonautics, Sergei Korolyov, who died in 1966.
One more family of rockets, the Protons, was first tested during his lifetime, while the rockets of the Soyuz family are the profoundly overhauled versions of his R-7 rocket.
Investment in the Angara project has exceeded $ 3 billion over the past twenty years.
According to experts at the Khrunichev Center aerospace corporation, a big advantage of the new rocket carrier is that “it is a universal space rocket system” capable of taking three types of rockets into space: light with a payload of up to 3.5 tonnes, medium with a payload of up to 14.6 tonnes, and heavy with a payload of up to 24.5 tonnes.
Medium lift and heavy lift launch vehicles can take payloads to the geostationary orbit as well.
The first test launch was originally expected to take place on June 27 but it was aborted as the automatic control system stopped the countdown. The launch attempt was delayed for one day only to be cancelled again.
The designer of the first stage engine RD-191 blamed the failure on a fall in the pressure of the oxidizer tank.
[MOSCOW, July 09. /ITAR-TASS]
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  • First rocket in Angara family test-launched from Plesetsk space center....

Russia’s Aerospace Defense Troops have done the first test-launching of a news Russian carrier rocket Angars-1.2PP, a spokesman for the Plesetsk Space Center in northern Russia told ITAR-TASS.

The launch was carried out as scheduled. The preparations and effectuation were supervised by the Commander of Aerospace Troops, Lieutentant-General Alexander Golovko.
The first test launch of the light class rocket Angara-1.2PP was originally expected to take place on June 27. The automatic control system stopped the countdown. The launch attempt was delayed for one day only to be cancelled again.............................http://en.itar-tass.com/non-political/739709
8/7/14
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Παρασκευή, Ιουνίου 27, 2014

Russia postpones Friday's planned launch of Angara space rocket (VIDEO RIANEWS)

The test launch of an Angara space rocket automatically aborted due to “technical issues,” Russian officials said. While the second attempt is scheduled for Saturday, President Putin has ordered the reasons for the launch failure be detailed in one hour.

The launch of the Angara was aborted just few minutes before the start due to “technical issues,” sources in the Russian space agency Roscosmos said. The mission was aborted automatically.


The new attempt is scheduled for Saturday, 3:15pm Moscow time (11:15 GMT).

Defense Minister Sergey Shoigu reported the failure launch to Putin and requested one hour to establish the facts in the situation.

“Do not rush the work. Carefully analyze everything and report to me after an hour,” Putin told Shoigu.

Brand new Angara rockets, Russia's first new design of space vehicle since the Soviet era, have been in development since 1994. The defense program has cost over 100 billion rubles (around US$3 billion). Friday was to see a debut launch from the military space launch pad in Plesetsk, in the country’s north-east. It should have reached the Far East’s Kamchatka in 21 minutes.
[indian.ruvr.ru]
27/6/14
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Video: Angara Rocket Displayed at Khrunichev Center:

Σάββατο, Μαΐου 17, 2014

Pentagon plans multi-billion dollar project to combat space junk

Later this month the US Pentagon plans to award a massive contract to one of the two most influential American contractors for a project that, if all goes according to plan, will be able to identify space debris before it becomes a threat to the Earth.
Lockheed Martin Corp. and Raytheon Co. are competing for the $6 billion contract to design and construct Space Fence, a radar system that will eventually be able to track large bodies of space matter. The plan is being put into place so that the government can not only better predict the bodies that may come into contact with Earth (such as the asteroid that exploded over Chelyabinsk, Russia, for instance) but also to better protect satellites that could be destroyed while in orbit.

There’s a lot of stuff up there, and the impact of the new space fence will be able to track more objects and smaller objects,” Joan Johnson-Freese, a professor of national security affairs at the US Naval College, told the Sydney Morning Herald, adding that the technology “is a necessity, but not sufficient…We need to move on to an active plan for removal.”
  • The National Aeronautics and Space Administration has estimated that 500,000 chunks of man-made material floats around the Earth.
 Any one of those could damage or completely knock out the 1,200 operational satellites owned by various nations that are responsible for providing Internet access, banking functions, cell phone connections, Global Position System mapping, and other necessities.
  • The debris smashes together so fast – a combined speed of 22,000 miles per hour, six times the speed of a high-velocity bullet – that the collision is accompanied by a massive shockwave, according to the Wall Street Journal.
It literally shakes the satellite apart,” Felix Hoots, a distinguished engineer at the Aerospace Corporation, a government-funded space research group, told the paper. “The [fence] is going to give us a lot more data and see a lot more objects than we’ve seen before.”
US Air Force general William Shelton said during a speech earlier this year that the military issued more than 10,000 warnings of close calls to American and international satellite operators. The risk is growing, though, as a generation of satellites enters old age and break down. China intentionally destroyed one of its own satellites with a rocket in 2007, for example, sending 2,500 more pieces into space.
If maybe a two-to-three-centimeter sized object can be lethal to fragile satellites, we’ve got a lot of traffic in space that we need to be worried about and we just can’t track it right now,” he told the Journal.
rt.com
17/5/14
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Δευτέρα, Ιανουαρίου 27, 2014

Russia, US Plan to Jointly Fight Space Threats

MOSCOW, January 27 (RIA Novosti) – Russian and US experts are planning to join efforts in protecting our planet against thousands of potentially hazardous near-Earth space bodies, Russia’s emergencies minister said.

“The collision with the Chelyabinsk meteorite last year showed that space threats could be real and as destructive as huge fires or natural disasters on Earth,” Vladimir Puchkov said in an interview with Rossiiskaya Gazeta to be published on Tuesday.
The minister said a joint working group would be set up in the near future to develop solutions to counter space threats.


A meteorite entered the Earth’s atmosphere undetected by existing space-monitoring systems and slammed into Russia’s Ural Mountain region last February, accompanied by a massive sonic boom that blew out windows and damaged thousands of buildings around the city of Chelyabinsk, injuring over 1,500.

NASA estimated the meteorite was roughly 50 feet (15 meters) in diameter when it entered the atmosphere, traveling many times faster than the speed of sound, and exploded into a fireball brighter than the sun.

A team of researchers has recently studied two decades’ worth of data gathered by US government-run infrasound sensors positioned around the planet and discovered that 60 asteroids up to 20 meters (65 feet) in size had crashed into the planet’s atmosphere over the period – far more than had been previously thought.

The scientists suggested in a report published in Nature magazine that asteroids like the Chelyabinsk one could strike the planet every 20 or even 10 years, compared with an earlier estimate of once a century.

Despite the growing concern about the asteroid threat, no anti-asteroid defense programs have been developed in practice so far, with only several theoretical concepts being studied.
 http://en.ria.ru/russia/20140127/186966575/Russia-US-Plan-to-Jointly-Fight-Space-Threats.html
27/1/14
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Δευτέρα, Ιανουαρίου 20, 2014

Rosetta spacecraft to be woken after nearly three years, ESA awaits signs of life

The European Space Agency (ESA) is awaiting signs of life from its comet-chasing spacecraft Rosetta. The probe - now in the vicinity of Jupiter's orbit - has been in hibernation for nearly three years. 

An internal "alarm clock" aboard the Rosetta spacecraft was scheduled to go off at 1000 UTC on Monday, waking it up from nearly three years of slumber. But given the six hours Rosetta would need to power up its system, plus the time needed for its signal to traverse the 807 million kilometers (501 million miles) to Earth, the European Space Agency (ESA) said it wasn't expecting to hear anything until the early evening.

The signal is to be heard first by NASA's deep space tracking dish in Goldstone, California, then by eastern Australia's station in Canberra, and finally, by the ESA's station in Western Australia.
The ESA launched Rosetta into space in 2004with the goal of carrying out tests on the comet 67/Churyumov-Gerasimenko. If all goes well on Monday, the spacecraft will fly towards the comet in the coming months (depicted above), enter into its orbit and eventually land on its surface. Scientists hope to gather samples from the rock with its 220-pound (100 kg) lander Philae, which could reveal more about the make-up of the solar system at its earliest stages.
In the time since it was thrust into space, the comet-chaser has been gathering speed to put it on the right trajectory toward comet 67/Churyumov-Gerasimenko. It has travelled past Earth three times and Mars once.
In mid-2011, ESA scientists shut down all of its operating systems except for its computer and several heaters. Rosetta has been running on solar power since that time on its journey toward Jupiter's orbit.
The ESA has provided a link to its live broadcast as it awaits signs of life from Rosetta: ESA live transmission
kms/pfd (AP, Reuters)
DW.DE
20/1/14

Πέμπτη, Ιανουαρίου 16, 2014

Japan's Launching A Giant Net Into Orbit To Scoop Up Space Junk (video fr)

Something must be done to deal with the estimated 100 million bits of man-made space junk circling the planet, and Japan is taking the lead. But can we do? Shoot it with a laser? Invent Wall-E-like robots to collect it? Nah… let’s just blast a big net into space.


Next month, Japan Aerospace Exploration Agency (Jaxa) will do just that. Having teamed up with a company that manufactures fishing equipment, Jaxa developed a wire net nearly 300 metres long but just a foot wide that will be launched into orbit. Once it’s unravelled, the net will generate a magnetic field that will theoretically attract nearby space debris.

The mission isn’t as whimsical as it sounds. The growing cloud of space junk circling the planet poses a real threat to the hundreds of satellites in orbit, not to mention the International Space Station. It’s not just nuts and bolts, either. Experts believe there are some 22,000 pieces of space debris over 4-inches in size. Any one of those chunks could start a chain reaction that could take out Earth’s entire communications system.

Jaxa’s net test next month is just the first of many. By 2019, the agency hopes to send a net nearly half a mile long into space to scoop up all that random debris. It’s unclear what they’re going to do with the junk after they’ve captured it, although hopefully there’s enough scrap metal to finally get that Voltron project going. [SCMP]
gizmodo.com.au
16/1/14
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Πέμπτη, Οκτωβρίου 17, 2013

Près de 200 déchets spatiaux tombent sur Terre par an (chercheurs). -Certains présentent un danger réel.

Près de 200 débris spatiaux - satellites, éléments de lanceurs - tombent chaque année sur Terre, dont certains présentent un danger réel, a annoncé jeudi à Moscou Sergueï Gaïdach, chef du Centre des prévisions spatiales de l'Institut de magnétisme terrestre.

"Le problème des déchets spatiaux est grave. Nous surveillons des dizaines de milliers d'objets en orbite. L'espace est très pollué ce qui pose des problèmes pous les activités spatiales. 200 objets quittent leur orbite tous les ans. Les objets légers brûlent dans l'atmosphère, mais si le poids d'un objet est grand, il atteint le sol", a indiqué M.Gaïdach devant les journalistes.


Selon lui, l'activité solaire fait parfois "gonfler" l'atmosphère terrestre ce qui ralentit les engins spatiaux et risque de provoquer leur chute. La station américaine Skylab, d'un poids de seulement 80 tonnes, est notamment tombée dans un désert australien après un "gonflement" de l'atmosphère terrestre. La station soviétique Saliout-7 est tombée pour les mêmes raisons, d'après M.Gaïdach.

Le temps spatial est susceptible d'influer sur la trajectoire des engins spatiaux. Il faut donc surveiller le temps spatial pour mieux contrôler les débris spatiaux en orbite, a conclu le chercheur.
 http://fr.ria.ru/science/20131017/199584237.html
17/10/13
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Κυριακή, Ιουνίου 23, 2013

Russian Scientist Proposes Satan Missiles to Fight Asteroid Threats

YEKATERINBURG, June 23 (RIA Novosti) – Russia can use Soviet-era SS-18 Satan heavy intercontinental ballistic missiles to destroy celestial bodies posing a threat to Earth, a Russian scientist said on Sunday, four months after a powerful meteor struck Russia’s Urals region.

“Carrier rockets created on the basis of intercontinental ballistic missiles like Voyevoda [the Soviet name of Satan missiles], which use standard liquid fuel based on hydrazine, are well-suited for fighting suddenly discovered small [space] objects,” said Sabit Saitgarayev, a senior researcher at the State Rocket Design Center in the city of Miass in the Chelyabinsk Region.
“They [missiles] can stay in the condition of their readiness for launch for ten and more years, after some reequipping,” the scientist said.


Cryogenic fuel used in Russian heavy space rockets Soyuz and Angara cannot be kept for long and is supplied directly before the launch. Several days are required for preparing these rockets for launch, which makes them unsuitable for destroying small space objects that can be discovered several hours before their collision with the Earth, the scientist said.

Satan missiles can be used for destroying small space objects with a diameter of up to 100 meters threatening the Earth, if the missile is equipped with the third stage. If reequipped with a booster, the missile will be able to destroy space objects five-six hours before their collision with the Earth, he said.

The Satan missile can take off 10-20 minutes after an order for launch, the scientist said. If two hours are needed for the missile to reach the target, another two hours are required to specify the space object’s trajectory and one hour to coordinate the missile launch with the heads of other countries, he argued.
The scientist’s proposal comes about four months after a meteorite entered the Earth’s atmosphere and slammed into Russia’s Urals on February 15 with a massive boom that blew out windows and damaged thousands of buildings around the city of Chelyabinsk, injuring 1,200 people in the area. According to the Health Ministry, 52 were hospitalized.
NASA estimates the meteorite was roughly 50 feet (15 meters) in diameter when it entered Earth's atmosphere, travelling faster than the speed of sound, and exploded into a fireball brighter than the sun.

The Soviet-era Voyevoda (SS-18 Satan) ICBMs have been in service since 1967.
http://en.rian.ru
23/6/13
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Σάββατο, Μαΐου 11, 2013

Comment faire le ménage dans l'espace ?


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Depuis le début de la conquête spatiale dans les années 60, le nombre de débris présents dans l'espace s'est accumulé de manière quasi-exponentielle.
Aujourd'hui une couverture de poubelle high-tech entoure la terre.
Environ deux tiers de ces objets viennent de l'éclatement d'autres débris spatiaux : que ce soient des explosions ou des collisions. Comme celle de 2009 entre les satellites Iridium et Cosmos à près de 800 kilomètres au-dessus de la Sibérie.
La taille des débris varie de quelques millimètres à la taille d'un bus, n'importe lequel d'entre eux peut abimer un vaisseau estime le chef du bureau des débris spatiaux de l'agence spatiale européenne.


Heiner Klinkrad, directeur du bureau des débris spatiaux de l'Agence spatiale européenne : "Un objet d'un centimètre avec une vitesse de collision standard de 50 000 km/h aurait une énergie cinétique à l'impact équivalente à une grenade qui explose ou une voiture percutant le satellite à 60km/h... je vous laisse imaginer."

Le « pas de géant pour l'humanité » a emmené dans son sillon de lourdes conséquences.
La 6e Conférence européenne sur les débris spatiaux tache de trouver des solutions ; le but étant principalement de trouver le moyen d'éviter le syndrome dit de Kessler où les débris spatiaux seraient si nombreux que leur collisions augmenteraient de manière exponentielle.

Heiner Klinkrad, directeur du bureau des débris spatiaux de l'Agence spatiale européenne : "La seule façon de résoudre ce problème est d'aller régulièrement dans l'espace au niveau de l'orbite pour y rapatrier entre cinq et dix objets massifs par an. C'est la seule manière d'être sûr de contrôler cet environnement."

Les façons de capturer et rapporter ces objets sur terre sont actuellement à l'étude.
Cette tache titanesque est certes un défi technique mais peut-être encore plus un nœud juridique et politique inextricable.
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Οι νεκροί Έλληνες στα μακεδονικά χώματα σάς κοιτούν με οργή

«Παριστάνετε τα "καλά παιδιά" ελπίζοντας στη στήριξη του διεθνή παράγοντα για να παραμείνετε στην εξουσία», ήταν η κατηγορία πο...