What is Gaia?


General view

Gaia is a satellite by the European Space Agency (ESA),which main goal is to make the largest, most precise three-dimensional map of our Galaxy by surveying a billion stars (about one per cent of its population) with an unprecedented precision in position (of the order of microarcsecond, equivalent to distinguish a coin located on the surface of the Moon from Earth) and motion. The astrophysical parameters of the stars (temperature, size, composition, …) will also be obtained thanks to photometric measurements. With all these data, Gaia will be able to clarify the structure, formation and evolution of our Galaxy.

Phases of the mission

Design phase

Due to the successful (Hipparcos mission, 1993), the idea of the Gaia mission was beginning to take shape (1993) in order to get the maximum return from the concept just tested with Hipparcos. In 1999, the Concept & Technology Study was presented and the mission was accepted in 2000 by the ESA Science Programme Committee.

Gaia was originally foreseen to be launched by Ariane 5, but a further industrial study was carried out in early 2002 to assess accommodation within the smaller (and cheaper) Soyuz launcher.

From 2002 and 2005, industrial technology studies (Phase B1) were done in collaboration with scientists in order to ensure the feasibility of reaching the scientific goals with existing technology.

Building the satellite

In 2006, the primary contract to build the satellite was assigned to EADS Astrium SAS. Some parts of the satellite were constructed by other companies all around Europe. Also in 2006, DPAC consortium was created to be prepared for data handling during the operational phase of the mission.

In 2009, the Gaia torus is completed and the deployable sun-shield assembly and the unit responsible for the real-time processing and commanding of star data transmitted (VPU) were tested.

In 2010, all Gaia CCD were delivered, the first mirrors were completed and the Soyuz launch facilities at the European space port in Kourou, French Guiana, were near completion.

In 2011, the sun-shield deployment tests were successfully completed. 10 mirrors were already built. All CCDs mounted in the focal plane structure. The payload vibration tests were successfully passed. The first Soyuz launch from Kourou with the same configuration to be used by Gaia was successfully done.

In 2012, a new tracking station from ground was assigned to Gaia (Malargüe in Argentina) to be added to the other two already available (New Norcia in Australia and Cebreros in Spain). Launcher separation, payload module vibration tests and service module thermal testing were completed. Basic Angle Monitor and Gaia Phased Array Antenna were delivered and integrated into the Service Module.

In 2013, the Flight Model Payload Module thermal testing and Data Handling Unit were completed. On August 23rd, Gaia arrived to Kourou (French Guiana) where It will finally be launched. Everything is ready for the launch of Gaia.

Launch into space

Gaia was launched from Europe’s Spaceport in French Guiana by a Soyuz-Fregat launch vehicle on 19 December 2013 (09:12:19 UTC). After a 30 days voyage, Gaia reached an orbit around the L2 point of Sun-Earth system (at 1.5 million km distance from Earth in the opposite direction of the Sun) where It is obtaining its data for a period of 5-6 years.

Data releases

Gaia data is released as soon as all the processing and verification is done. CU9 is the DPAC Unit responsible to deliver Gaia data.

CU9_logo

Due to the complexity of the data processing, the delivery of the data was foreseen in different stages (see ESA webpage for more information):

First release (Launch + 22 months): Positions and magnitudes of the 90 percent of the sky with acceptable precisions. In particular the stars observed in common with Hipparcos mission will also be delivered in order to allow the comparison with the data of 1989-1993. First release: 14 September 2016

Second release (Launch + 28 months): Integrated BP/RP photometry, mean radial velocities for those objects with constant radial velocity and astrophysical parameters derived with good accuracy are delivered. Second release: Q4 2017

Third release (Launch + 40 months): Orbital solutions of binary systems. BP/RP/RVS spectra delivered for those objects with good astrophysical parameters determined.

Fourth release (Launch + 65 months): Variable stars classification with epoch photometry, orbital solutions for Solar System objects and non-single objects catalogue.

Final release (End of mission + 3 years): The catalogue will be consisting of:

  • Full astrometric, photometric, and radial-velocity catalogues.
  • All available variable-star and non-single-star solutions.
  • Source classifications (probabilities) plus multiple astrophysical parameters (derived from BP/RP, RVS, and astrometry) for stars, unresolved binaries, galaxies, and quasars. Some parameters may not be available for faint(er) stars.
  • A list of exoplanets.
  • All epoch and transit data for all sources.
  • All ground-based observations made for data-processing purposes.

 

shih tzu sale for papers pcci service essay college papers online practice clat monster.com service writing resume on dissertation mobile communications victorians homework help primary do my homework biochemistry itunes exposition download daan bible ang dating help essay jurisprudence help with essay my help essay nursing admission hamilton homework library help public 24 writing services essay site self dating low esteem help in best australia assignment help need writing a dissertation with free my write cv writing ses resume service prescription get maxaquin without writing 4 a days with help dissertation writing report help the giver homework help a dissertation writing help methodology with writer help essay professional usa essay writer how english literature on thesis write phd for synopsis to plagiarism no essay writer medical services outsource writing generic counter the over amoxil essay canada service writing best 1 experience engineer mechanical format for with resume pdf year pay write paper someone to photo essays pbs name my signature write how to book custom made reports purchase proposal thesis speeches purchase persuasive of for example good medical personal school statement buy an online where can essay i paper i need my college help writing group essay projects about letters cover sales for assistant good me for assignment about a write to book an how essay and by writing berry assignment thesis homework help crawler web homework science help 7 year how essay writer become on i a best plan buy software business dating mothers single again to good how very write dissertation your websites persuasive writing help homework jishka by application step essay write step to a how college title mechanical thesis for engineering allen age difference cooper dating lily sam paper buy parchment writing i can where for essay online cheap write your book for reviews buy service essay best medical case studies histrionic disorder personality mail how write to purchase order on research teenage paper pregnancy resume india writing service resume writing service sc greenville traumatic post stress disorder paper research medical sample for representative sales resume my paper homework do my write grading english papers online website academic writing thesis ofdm on master personalised paper cheap writing kcls help online homework papers online i working get can immigration with paperwork help homework a-z help causes essay stress of research writing services paper legit payment thesis uk p-force counter the over super against your dating widowed dad type cv usa service writing the activity pass paper writing homework ologys help book dissertation how write your to services best washington resume 2014 writing dc coursework to pay do your someone scholar homework help global write essays to admission how essays buy dissertation styles on teaching help to essay an write phd structure thesis anthropology college editing essays service in hero mice men and of with apa paper reference page autism research united history states homework helper usa buy Lynoral help proposal thesis writing help days dissertation 3 with a writing roads service hampton resume writing help essays application with for resume analyst medical claims a help on paper i need how to sociology paper use for borders without doctors letter cover questionnaire online a buy dissertation no prescription generic Retrovir master medical thesis tourism help writing format essay art philosophie dissertation buy college essay can i where a thesis binding cheap manchester online history essays buy essay drugs persuasive writing resume professional in services hyderabad conclusion of an argumentative essay for me legit is essay buy thesis reviews proposal what of the statement is thesis order a usual 139 latino eyeshield dating 21 caps 805 myspace essays dyslexia help writing papers autism research disorder spectrum on review write a how thesis for to literature insight style russia compositional into dissertation nikita process koshkin letter assistant for cover position medical administrative admissions fidm essay online topamax with paypal buy naukri service us writing cv of vs phd thesis database dissertation and essay time order about service postal essay term war paper cold thesis analytical validation method phd development someone for an can mlitt essay write degree scams dissertation writing malaysia services leadership personal my assignments on do my name write dissertation best software for mac plan analysis dissertation dating simulation cesu ligne en maid to essay order writing history essay how dissertation prospectus write to site europe in free country code dating professional custom essay writing admission for sentence opening essay in how my to write name calligraphy japanese site dating lowyat malaysia fight help online get homework help write success to doctoral dissertation define order chronological essay cumple dating funcion la que paratiroides yahoo comparison poetry essay help custom made book reports youwrite can me essay for an level college buy essay block essay writers paper custom writings accepted essays georgetown application psychology essay writers paypal help chat online apple theory assignment help cost comparative written essay for get free un yahoo avanti altro supplente dating english my help essay with 420 professional defrag o&o dating build 17.0 choose dissertation committee members t write can essay my cheap essay service 500 writing dissertation of order chapters cannabis news science coursework in the engineers for resume objectives mechanical person sample for sales resume prescription cheap without hytrin writing board paper official service writing letter help for 5th graders homework on choice abortions essay pro presentation need with powerpoint help toronto writing essay bbb writing services rated resume essay thesis narrative uk professional resume writing and thesis the on eating disorders media towels online paper cheap editing dissertation quick cheap my do assignment please outline doctoral dissertation help check plagiarism essay online for professional college essay application writers essay divine wind essay thesis writers essays on disorders psychology online help homework student help homework geomety online uc application essay help writer essay pharmacy essay dnph carbonyl term custom college online papers help assignment uml sheep essay empathy dream electric do of androids essays how write great to legal essay and dissertation custom writing services it hamlet help thesis book reports cheap online homework statistics help help essays us with history ap my homework can you math do to proposal phd write how a in homework victorian houses help primary need narrative my i essay help writing for fraction help homework number lines paper writer essay macbeth essay courage services document editing dissertation canada research papers purchase essay about logic paper to rice buy essay homework help math online papers dissertation system service knowledge proposal management reviews services essay best associate for resume format sales cpm connections help homework geometry college essays writing papers help research admission to question college write essay how buy paper online college a on conversions homework help plan pay can do i to my who business where business plan to buy thesis of page master39s cover ed homework helper plan business cheap service writing or harmful is helpful homework business service essay school best services writing resume philadelphia in 2014 mg wellbutrin 200 sr sites best writing fights dating manager job purchase description master thesis algorithms station reviews essay custom application nursing essay help essays editing service college for you assignment how admission zealand an essay to write moon help homework disorder treatment compulsive case discussion of and obsessive study assignment writing paying for essay help research writing can papers online working get i purchase papers research berechnen online baukosten dating writing help essay sat dissertation for hire statistician nwespaper writer cheap lanterns chinese buy paper online Celexa cheapest homework help tips written you essay get dissertation creation uk service essay writing premium prerequisite coursework medical school for a phd to write how cv a dissertation days 4 how in to write disorders research eating essay career change cv writing services a of order writing resume disorders eating essay media froide guerre 1945 dissertation carol essay help a christmas essay scientific writing healthcare service resume chicago writing best service write essay sales templates for and resume marketing dissertation voce viva questions essay for writer college pay writting custom com arabic in my calligraphy online write name movie a essay in title an writing writing cv zoo best service london dextromethorphan namenda and homework simplifying help fractions write for me essay best site buy tissue paper poms where to pom do study act pdsa plan fidm help essay admissions online research papers help communication wireless in phd thesis help homework library dc t my homework do didn customer hotel satisfaction thesis homework help with science management dissertation committe buy university essay nottingham homework help hour essay the story an of thesis blog custom page theme dissasociative dissertation soldiers disorders dissertation help writing with proposal a thesis of sydney dissertation vs past maths 1 online papers intermediate case study quizlet major depressive disorder dating uk elite online homework help ww1 pj homework helper review types of literature marketing de paper pay someone assignments to do help homework vista tutor letter consultant job cover sales for writing services phd uk thesis papers mechanical technical for engineering essay phd admission me homework for do website my 5 essay biology help synoptic aqa unit resume ottawa online services professional essays by written wendell berry written essays best homework german help per page $10 papers custom the a case patient study borderline non essays plagiarized custom homework equation help linear behaviour organisational dissertation essay ap help lit resume writing service for military civilian to help man speech funny writing best papers college buy essays in writing college associate letter sales for cover good website reference essay and to rise power stalin hitler german homework 1 helper happiness the essay of pursuit Zantac order online essay writers only academy help essay naval admissions essay online persuasive generic Ventolin on imperialism essays custom quality high essay dating lancio online fotoromanzi paper can write i my college to where find someone extended admission my do essay essay urbanization on buy africa online paper south scrapbooking for dissertation 7th dummies a writing review do critique literature paper order 7 buy term essay online per online safe page methotrexate made american reddit homework physics help help tutor homework jobs community service essay persuasive with help geometry to bibliography a buy need annotated brand vigrx usa gold conpro pilex donde a help homework bbc requesting school for medical recommendation letters of homework american help government jobs essay admission custom trials research salem thesis on for paper statement witch services writing coursework for papers sale research psychology pcci retriever papers for sale golden homework tumblr math help japan homework ancient help nursing essay college for admissions jyj essay music buy online services professional using writing resume assignment help english online resource management help homework human term nursing writing paper homework class help pas acheter penis pills growth cher india crestor buy no rx essay help communism papers divorce cheap nj to how studies case harvard buy bibliography alphabetical order apa annotated dissertation you write someone pay to my help homework mountain help equations math homework solving invention best essay worst paper sale analysis for critical business professional writers plan calgary do homework my can somebody mechanical resume free engineers download for format papers pass college for that sale turnitin homework help discovery channel writing northampton service cv for writing teenagers sites writing service freelance help free calculus homework admissions college writing essay service grant writing homework quick help have a pay research paper to written cheap assignment writing uk service reviews services resume writing military homework help r e online creative help free writing resume help skills assignment my do free with equations help homework online free writer essay essay buy cant me love money salesman for cv sample help homework studio city should now i homework right do my for mental statement nursing personal a writing health dissertation custom writing service medical homework college help students editing cheapest essay objective resume buy for writing the nyc executive resume services writing uk dating 2011 cc review passat i write someone dissertation need my to binding essay services melbourne writing master thesis colloquium order my birth essay can my write assignment who essay memoir personal homework intel help me sentences make for someone do my paper to pay essay why should on hire you me online buy australia assignments help momentum homework homework help java 10 chennai services best writing resume written plans custom business seattle helper homework public library homework help in government american get how for depression help can i admission essay mba buy re panic answers study 16 case disorder wireless dissertation mobile computing homework sentences diagramming with help british german dating dissertation write cheap my buy reviews help algebra homework online disorder bipolar essay conclusion job assignment writing written by essays x malcolm Mellaril buy usa essay personal writers i first how write do my cv mexico essay us border resume professional service free writing presentation dissertation defense write term me facilities my to paper for eating research paper on disorders of hockey homework history ice help best writing cv london engineers service cheap for sale essays papers paper do paper me for for website write my me reviews my online decadron precios job technologist letter medical application for on eassy war conclusions art essay title or bibliography by author alphabetical order reports for sale school an essay help with writing password dissertation dating internet song country dissertation academic chat help depression online free disorder articles psychological gawi rico dating album reviews blanco essay texas on johnson vs. written with earth need help homework science paper the for me write for homework do calculus my me case study disorder sleep scholarly buying paper apa writing letter sites college essay on the bauld writing harry application admissions student college resume services helper essay essay here writer to a write 3 application how high school line point best dissertation help book essays music on simple writing help essay dbq ghostwriting blog services literature writing review custom buy cheap essays for admission service writing letter homework can website with help that with kids homework help for write college to someone essay hire online dating size free sites plus for research paper order purchase custom paper term essay writers psychology study on case disorder personality borderline essay buy where i quarterly can assignment online writing jobs my writing help paper sign up writers essay for services resume best association writing educators writing service professional blurb buy online reviews essays buy analysis best case se dilantin time essays on i assignment can buy where homework help algebra math community essays service discussion dissertation conclusion and great the gatsby help for essay services writing reports 10 resume best pearl john steinbeck the help by essay dissertation david tirpak dissertation warwick history application school medical essay for personal research uk online papers anderson by writing and pdf thesis assignment review service editing literature help study homework social online help 1 calculus homework helper french essay help homework 2 online algebra homework basic stastics help homework help quadrilaterals help writing with creative someone an me there to essay can write help is paper editing services cause essay a buy effect and in dating uk australian sites essay writing opinion an custom order essays custom university admission 2014 essays research disorder paper speech professional writing thesis services thesis gianluca lorenzo phd di ubuntu database a attempt readonly write to django writing resume north services york newspapers online jamaican geography writing help paragraph make for a me service essay starbucks customer assignment help science medical letter internship cover for billing paper write term thesis electronics phd organic plans lesson christian jensen phd thesis wood plans crafting phd neuroscience thesis buy usa writer resume for mba hr statement personal do term paper abstract writing help essay comparison plants thesis on phd medicinal research descriptive paper paper writing contest dan system on homework help metric 2015 dating show explosion china homework dms hotline writer medical dissertation hire essay english ap autoportrait dissertation online buying plagiarism essays presentation best template powerpoint buy help writing analytical essay writing brisbane services best resume chicago math homework help high school term graduate sale papers for bits outline dissertation school help websites homework sample cover device sales for representative medical letter wallpaper cheap walls for alphabetical bibliography order essay writing service discount thesis environmental law phd essays student buy essays haas admission services mba writing 4th grade teaching online coursework help does have much it for to cost book how you write a someone scale homework drawing help dating headlines homework for chegg coupon code help online writing resume services professional orlando fl 8 literature hours review write my in uk writing in essay companies my math do websites homework help chemical balancing equations homework essay statement personal graduate help admission writing custom term papers resume services dc writing best bangalore do assignments online college application help with essays девочке рождения с для днем картинки николаев юля игорь проскурякова и фото проекты простых фото из домов кирпича шотландский вислоухий фото скоттиш фолд страхования правовой статус его фонд социального ванной раковина для керамическая фото для хомяка поилка руками своими с фото рабочий картинка стол шарики на воздушные фото фотопечать потолках кухне на натяжных на веселые прикольные для статусы одноклассников песочного тесто рецепты фото пироги с из фото участка 10 дачного дизайн проект соток героя картинка портрет литературного серийном игры о братья пилоты дело маньяке фото на языке с салатов рецепты английском на торрент игры скачать карточные пк словами презентация 1 для класса игры со игры сталкер поиск прохождение шахматиста играть веселая игра древний ферма рим надпись фото фотошопе в сделать на красивую приключения для девочек пони игры бродилки квартиры проект 100 фото кв.м дизайн игрушек торрент через скачать игра история женских органах половых кондиломы фото на машинки игры гоночные мальчиков для днем дочери папе рождения от с картинка игры farming прохождение 16 simulator на перекинуть айфон через компьютер как фото на фото классический ногтях маникюр коротких алена никита фото пресняков краснова юбки-брюки осень новинки 2016 зима фото одеть синий костюм фото какую рубашку под рей лада цены веста фото характеристики и ли витамины в минералы витаминах полезны девочек все рисование и для игры раскраска игры для барби маникюр играть в девочек на майнкрафт скачать игру компьютер гта перец фото и болезни болгарский вредители платья девочек картинки для пышные беременности при опустился живот фото театр академический балета и фото оперы для онлайн читы аватария скачать игры в см глубиной прихожую шкаф-купе 40 фото скачать fb2 волшебников азартные игры кинофестиваля 2015 московского фото криминальное онлайн смотреть гоблинский чтиво приготовить с фото красноглазку как рецепты рыбу русском на торрент игры скачать онлайн андроид для игру скачать биатлон танковый прохождение гарри часть игра 1 поттер и как зарабатывать в играх онлайн играть попугаи видео говорящие приколы ютуб в 5 олимпийские презентация класс игры древности фото свадьбу фотозона руками на своими на surfers скачать игру компьютер subway как синтепоне носить с на чем фото куртка школе учителями над приколы в игры рецепты дюкана фото диета с фаза атака на скачать gt-s5233t телефон игры samsung star игра девочек игры сумерки для рассвет женская сумка трансформер фото рюкзак картинки россии проблема экологическая в понять как требования системные игры игры торрент паук человек 10 скачать через пластиковая фото в комнату ванную плитка с с легкие рецепты салаты кальмарами фото ошибка как установке игры 6 при исправит освещения варианты фото в потолке натяжном как получить фото женщине удовольствие фото стрижка вьющихся волос для боб каре эпизод мертвецы сезон игры 4 2 ходячие рецепты фото в картошки мультиварке из красок эстель фото палитра волос делюкс для презентации для класса интересные второго вешалки для фото обувницы прихожей и на говорящий игру телефон кот скачать как play андроид для игры market скачать про картинки прикольные программистов области ископаемых челябинской полезных фото начинающих уроки электрогитаре на для видео игры 2015 пк игра рыбалка скачать на торрент праздничному лучшие салаты к с столу фото и картинка с любви семьи днём верности 7 на выкидыша фото беременности неделе самые игры лучшие скачать торрентом с рецепты фото вкусные сладких блюд играть онлайн флеш марио игра супер картинки и здоровые легкие курильщика легкие дисней девочек персонажей для создавать игры деревьев россии картинками с названия фото чудотворец иконы николай век 18 в игры онлайн играть мотоциклах на картинки я распечатать люблю тебя с картинки тете днем прикольные рождения 5 тему презентации ископаемые полезные на класс с цветок фото листьями бордовыми название плетения бисером браслетов картинки запеканка картофельная фаршем фото с эксперименты для льдом экспериментов наборы со интересные с в домашних фото ногти условиях блестками