Le Monde | • Updated
What are the instruments on board Philae and what are their functions (SESAM MUPUS, …)? The World: There are ten … SESAME MUPUS and measure physical properties of the soil. There will also be a drilling depth of 20 cm. A field measurement magnétique.Des images site.Un radio survey of the core of the comet to determine its chemical structure analysis interne.Des …
Comment from Yann
I wanted to know if Rosseta has a laid back, if so how temp dureras return? Le Monde: No return! The data is sent continuously.
Comment from mildHello, how Philae speed drops? Thank you! The World: As already said, 1 m / s
Comment from SimonP
- A comet does not have a liquid core and not turning on itself … so it produces no magnetic field! Le Monde: If it turns on itself! Researchers expect a residual field from the alignment of some materials in the original magnetic field. Comment from Myzo
- The French Brouste Alexander went on stage to be congratulated for winning the award for the appointment of landmark landing Agilkia. The name comes from the Egyptian Nile island that hosted the temple of Isis following the construction of the Aswan Dam. Previously the temple was on Philae … Le Monde
- What is the speed of the comet? s how rosetta could approach without damage or material electromagntiques? The World: The Rosetta comet and at the same time spin 18.3 km / s. EMI should be low due to the comet which, if it has a magnetic field must be very very low. If the probe is in the solar wind as all probes Comment from achmi
- ” This is an important moment Rosetta receives data from Philae This is what we expected, “says Paolo Ferri, the.. lead. This means that images can happen (later …) Le Monde
- Acquisition of signal #AOS withESA_Rosetta. Mission control-have Regained touch as expected #CometLanding After Separation ESA via Twitter
- Encore applause: Rosetta’s Philae contact The expected signal happened Le Monde
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10:57 New pending with the expectation of a signal during the descent of Philae … Le Monde - Hot pics! Live action inESA_Rosetta control room DURING critical separation #CometLanding flickr.com/photos/esa_eve… pic.twitter.com/qm8hxNbX7F Le Monde: Finally a picture of joy quality ESA Operations via Twitter
- Here’s our lucky #spaceveg That ginger looks a bit like comet 67P #cometlanding bit.ly/rosettaliveblog pic.twitter.com/ujkZaseb92 The World: It’s quite like New Scientist via Twitter
- The pictures of the comet are they black and white or is it really gray? Le Monde: It is even very dark because its ice is covered with dust and absorbing carbon molecules whose precise composition is an object of the mission Comment from Xavier .
- Hello, how long it takes for the radio signal travel between the probe and the earth? Also do you know the amount of information per second that can be received? Le Monde: 28 minutes Comment from Arnaud
- Crusader in the corridors of Darmstadt, the Director General of the European Space Agency Jean-Jacques Dordain told us: “Alea is jacta Philae road and we can not. do anything for him. The Rosetta mission is a success because the orbiter is responsible for 80% of the science and it works perfectly. But Philae will provide information that Rosetta can not have such measures in situ.L’ESA shows once again she can do things that nobody had ever done 2014-11-12T10 “ Le Monde
- At ten o’clock, the suspense was at its height in the small control room <(sorry for the quality!) span />
- I restates the question of all- to the time for clarity: the 3-D representation given there 15 minutes, if we consider a form of duck or the probe is she “land” (head, body, neck) and there he has a reason for this choice? The World: The target area is on top of the smaller lobe. It was the least bad areas, but it has not for terrible portions Philae (steep or “rocks”). Scientists have thought for weeks before choosing Comment from niko
- What will be the speed attersissage Philae on the comet? Le Monde: 1 m / s or 3.5 km / h; the speed of a pedestrian Comment from Delphine
- Will he go down without thrusters? Le Monde: Again, Philae has no thrusters to descend. It is a free fall: it falls and that’s all. This “bow” that finally we do not know yet whether he will work or not only serves to avoid bounce on the floor (by expelling cold gas through the upper part). But if the ground is soft like snow, there may be no rebounds … Comment from Nicolas
- At what time (paris time) we will be sure of good landing of the probe? Thank you Le Monde: Not before 17 hours in any case … Comment from Guest
- Hello, 7:00 descent are considered. I heard this morning that the corresponding velocity is about 3.6 km / h. So it’s pretty much a flight altitude of about 25 km Rosetta. Since gravity is very low (0.00001 x envion), how do we get to keep Rosetta in “orbit”, if the term of its path is correct? Thank you for your clarification. Le Monde: Actually Rosetta is never in orbit in the sense that it turns on its own but its trajectory is continuously monitored, modified … Comment from Julien
- Philae is small compared to Rosetta. And the comet, it will be light as a feather! #PoseToiPhilae Pic.twitter.com/TbJ330a8by CNES via Twitter
- Our special envoy David Larousserie following the landing of Philae robot from the command center in Darmstadt (Germany) and respond directly to your questions. The World
- Detailed Comet 67P, photographed at a distance of 9.8 km on 24 October. The image shows an area of 854 meters by 854 meters (source: ESA).
- A representation three-dimensional comet 67P (source: ESA).
- The site of Philae landing on the comet, photographed Nov. 6.
- @ Philae2014 Go! RTESA_Rosetta: SEPARATION CONFIRMED! Safe journey @ Philae2014! pic.twitter.com/V6TLlgLhL2 (KR) World: DLR is the third center to deal with Rosetta / Philae DLR – English via Twitter
- And now, seven hours waiting for confirmation of the landing … Le Monde
- That’s it! The separation took place! Applause Le Monde
- Big pending. Everyone waits for the response of release … Le Monde
- How is the atmosphere in Darmstadt? Le Monde: “More excited than anxious,” said a researcher. Everyone seems confident (at least until release!). Comment from Stephane
- The first images from the OSIRIS camera on Rosetta installed should arrive from 14 hours (we will see in Philae with the empty can be made three feet) Le Monde
- On the TV studio in Darmstadt to the space agency, a model of Philae.
- A small number of wait: Tchoury loses 300 milliliters of water per second Le Monde
- What and current temperature of the comet? Le Monde: -70 degrees it seems to me Comment from Touiti
- Where do you have the information that you post? because even on the CNES website, there is no access
The World. I am in Darmstadt, near the control center (! with dozens of journalists) Comment from Will
- The first instruments of Philae are on: CIVA, SESAM, MUPUS Le Monde
- iTV talking about a problem with the “bow” of Philae What The World.? No. It’s just the system that was dumped in the ground module and avoid the rebound. The engineers seem to say they can do without it. Comment from Jendeloin
- This is just a huge sponge therefore! Rosetta has she already collected information on the comet since she arrived nearby? Le Monde: Yes! In fact, there are already more data (since March actually) than all other missions to comets (Giotto, Stardust …). We know its shape, density, its most common gases (water, CO2, hydrogen sulfide …). The teams will be published in December of the first major results (but no ads before!). Comment from Pierrick
- Philae is it equipped with a video system to display its’atchouryssage’? The World: There will be several landing evidence including images effectively (a camera in Philae and panoramic cameras around). But also shock sensors and radar estimating distances Comment from Jalna
- There’s there a high risk of outgassing of the comet that will eject Philae outside the comet? Le Monde: No, but it can disrupt the trajectory. For Rosetta, in the coming weeks, it will oblige him to move away from the core and make quick overviews short distance Comment from Baptist
- This is Cologne Darmstadt or the command center of the mission? information differ … The World: There is two or even three with Toulouse. Cologne is responsible for navigation; Toulouse scientific data; Darmstadt of all (roughly) Comment from Corsiglia
- CIVA is there as well as Planned … we’re Almost set! #CometLanding Le Monde: CIVA is a system of seven cameras designed especially to take panoramic pictures and thus to understanding where Philae was raised Philae Lander via Twitter
- This comet is it originating in the Kuiper Belt or the cloud Oort? Le Monde: Kuiper Belt Comment from Daniel
- Do we have an idea (however vague) of the total budget of the operation (from preparatory and feasibility studies up to now)? Le Monde: EUR 1.3 billion Comment from Jean-Michel
- When will we see the first photo? The World: From the release Philae take two photos “souvenirs” from Rosetta. And Rosetta will do the same. But these images arrive “late” (including that taken by Rosetta is more “big”). Late morning early afternoon. Comment from Pierre du Gers
- How do you know, even before the approaching the age of this comet? The World: The assumption is that these bodies are far dub Sun and beyond the last planet, they have changed little since the original system solaire.mais accurate dating is impossible.Le follow along this kernel will allow to learn more about its history and evolution Comment from Jean-Michel
- What are the countries that have contributed to the production of Rosetta (and Philae)? Le Monde: About 16 countries (from memory) in Europe Comment from Jake
- With your data prédédemment provided (at 8:54), its average density is 400 kg / m3 … so it would float on water I need regular. The World: Congratulations! Yes, it is lighter than ice because its material is actually very highly porous (about 70% empty …). And one of the questions is to better understand the structure Comment from ECA 35 FR
- Why did you choose this comet, there are more than 10 years, and not another? The World: The ESA had chosen another accident but the new Ariane forced to switch targets Comment from yannick
- By which system the module he communicates with Earth? Le Monde: Philae is in radio contact with the orbiter (but not always because everything revolves). Rosetta then communicates with Earth receptors in Australia and Argentina Comment from PG
- What is the size of the comet? Le Monde: She has a funny shape (popcorn, cashews, duck, it depends …). Its greatest length is 4 km. It weighs 10 billion tons and its volume is 25 cubic kilometers Comment from André
- The attraction and attachment will they be sufficient or the module may be” pulled “from the surface once installed? The World: There is a dual harpoons to take Philae to the ground. This will serve as during drilling which could raise the module without it Comment from Patrick
- @ 90 mins to Philae2014 separation fromESA_Rosetta. Next ESA TV broadcast starts at 09:30 CET (8:30 GMT): The World new.livestream.com/esa/cometlandi…: Next step for 10 hours so … (this is the time of signal reception Earth) ESA via Twitter
- The comet approaches you her Earth or has she already obsolete? Le Monde: Basically the Earth is 150 million kilometers from the sun and the comet 510 million. It approaches the sun thus we Comment from Rv33600
- Why Rosetta? The World: Because of the Rosetta Stone discovery in the 18th century and which helped decode hieroglyphics. Here we try to decode the origin of the solar system Comment from Jean Jean
- How does it control the position of the module that sits on 3 legs and not upside down without gravity on the comet? The World: There is “just” a supposed intertielle avoided the central head over heels. But if Philae falls on a “rock” or too steep, the module can be reversed … Comment from Hubert
- For one, this is of any program or adjust you information on the sequences of Philae you it landing on variables? Le Monde: Since the fall, the program starts with measurements of the composition of dust, gases and particles. But also the magnetic field. Landing and there is also a sequence of ten hours of experiments is already downloaded. Then it will depend on the exact location of the landing. A drilling is provided. Surface analyzes also (physical properties, soil composition ….). Comment from maxim
- How long will the mission on the ground? Le Monde: It depends on landing and batteries. If all goes well, there is a two and a half days of intense experiences, and can be until March if a battery is recharged with solar panels Comment from Chris
- What will be the impact on contact? Areas of weakness or degassing on the comet? The World: This is a question that will have the answer later in the day: the ground is soft or hard it Comment from Guest
- The famous tattooed legs of Matt Taylor, the scientist in charge of the mission Rosetta. ESA is seen on the right leg
- If there is a problem, Philae he has the opportunity to get back in working condition or mission is a failure? The World: In fact the mission has two parts: monitoring the comet for nearly two years (Rosetta) and landing with Philae, “the icing on the core.” So if Philae fails there will still be a dozen instruments that follow the nucleus to its maximum activity in the summer with the deployment of its famous tail Comment from Tom
- What is the gravity on the comet? Le Monde: It is very low. The 100 kg of Philae would 1 gram of terre.La gravity is one hundred thousand times smaller Comment from Guest
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