ExoMars (Exobiology on Mars) is an

astrobiology Astrobiology, and the related field of exobiology, is an interdisciplinary scientific field that studies the origins, early evolution, distribution, and future of life in the universe. Astrobiology is the multidisciplinary field that investig ...

programme of the

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(ESA). The goals of ExoMars are to search for signs of past life on Mars, investigate how the Martian water and geochemical environment varies, investigate atmospheric trace gases and their sources and by doing so demonstrate the technologies for a future Mars sample-return mission. The first part of the programme is a mission launched in 2016 that placed the Trace Gas Orbiter into Mars orbit and released the ''Schiaparelli'' EDM lander. The orbiter is operational but the lander crashed on the planet's surface. The second part of the programme was planned to launch in July 2020, when the '' Kazachok'' lander would have delivered the ''Rosalind Franklin'' rover on the surface, supporting a science mission that was expected to last into 2022 or beyond. On 12 March 2020, it was announced that the second mission was being delayed to 2022 as a result of problems with the parachutes, which could not be resolved in time for the launch window. The Trace Gas Orbiter (TGO) and a test stationary lander called ''Schiaparelli'' were launched on 14 March 2016. TGO entered Mars orbit on 19 October 2016 and proceeded to map the sources of methane () and other trace gases present in the Martian atmosphere that could be evidence for possible biological or geological activity. The TGO features four instruments and will also act as a communications relay satellite. The ''Schiaparelli'' experimental lander separated from TGO on 16 October and was maneuvered to land in Meridiani Planum, but it crashed on the surface of Mars. The landing was designed to test new key technologies to safely deliver the subsequent rover mission. In June 2023, a Roscosmos lander named '' Kazachok'' (refers to "little Cossack" as well as a folk dance), was due to deliver the ESA ''Rosalind Franklin'' rover to the Martian surface. The rover would also include some Roscosmos built instruments. The second mission operations and communications would have been led by ALTEC's Rover Control Centre in Italy. On 17 March 2022, ESA suspended the mission due to the ongoing invasion of Ukraine by Russia. ESA expects that a restart of the mission, using a new non-Russian landing platform, is unlikely to launch before 2028.

History

Since its inception, ExoMars has gone through several phases of planning with various proposals for landers, orbiters, launch vehicles, and international cooperation planning, such as the defunct 2009 Mars Exploration Joint Initiative (MEJI) with the United States. Originally, the ExoMars concept consisted of a large robotic rover being part of ESA's Aurora Programme as a ''Flagship mission'' and was approved by the European Space Agency ministers in December 2005. Originally conceived as a rover with a stationary ground station, ExoMars was planned to launch in 2011 aboard a Russian Soyuz Fregat rocket. ExoMars begun in 2001 as part of the ESA Aurora program for the human exploration of Mars. That initial vision called for rover in 2009 and later a Mars sample-return mission. Another mission intended to support the Aurora program is a Phobos sample return mission. In December 2005, the different nations composing the ESA gave approval to the Aurora program and to ExoMars.''European ministers approve the Aurora Exploration Programme and give green light for the ExoMars mission''
ESA, 12 December 2005 Aurora is an optional program and each state is allowed to decide which part of the program they want to be involved in and to what extent (e.g. how much funds they want to put into the program). The Aurora program was initiated in 2002 with support of twelve nations: Austria, Belgium, France, Germany, Italy, the Netherlands, Portugal, Spain, Sweden, Switzerland, the United Kingdom and Canada In 2007, Canadian-based technology firm MacDonald Dettwiler and Associates Ltd. (MDA) was selected for a one-million-euro contract with EADS Astrium of Britain to design and build a prototype Mars rover chassis for the European Space Agency. Astrium was also contracted to design the final rover. MAX-C-Rover

Oberhausen - Gasometer - Sternstunden 33 ies

ExoMars mission layout on MASK-2021 airshow

In July 2009 NASA and ESA signed the Mars Exploration Joint Initiative, which proposed to utilise an Atlas rocket launcher instead of a Soyuz, which significantly altered the technical and financial setting of the ExoMars mission. On 19 June, when the rover was still planned to piggyback the Mars Trace Gas Orbiter, it was reported that a prospective agreement would require that ExoMars lose enough weight to fit aboard the Atlas launch vehicle with a NASA orbiter. Then the mission was combined with other projects to a multi-spacecraft mission divided over two Atlas V-launches: the ExoMars Trace Gas Orbiter (TGO) was merged into the project, piggybacking a stationary meteorological lander slated for launch in January 2016. It was also proposed to include a second rover, the

MAX-C The Mars Astrobiology Explorer-Cacher (MAX-C), also known as Mars 2018 mission was a NASA concept for a Mars rover mission, proposed to be launched in 2018 together with the European ExoMars rover.Russian Federal Space Agency (now Roscosmos) and ESA had signed a contract that included cooperation on two Mars exploration projects: Russia's Fobos-Grunt project and ESA's ExoMars. Specifically, ESA secured a Russian Proton rocket as a "backup launcher" for the ExoMars rover, which would include Russian-made parts. On 17 December 2009, the ESA governments gave their final approval to a two-part Mars exploration mission to be conducted with NASA, confirming their commitment to spend €850 million ($1.23 billion) on missions in 2016 and 2018. In April 2011, because of a budgeting crisis, a proposal was announced to cancel the accompanying

MAX-C The Mars Astrobiology Explorer-Cacher (MAX-C), also known as Mars 2018 mission was a NASA concept for a Mars rover mission, proposed to be launched in 2018 together with the European ExoMars rover. One suggestion was that the new vehicle would be built in Europe and carry a mix of European and U.S. instruments. NASA would provide the rocket to deliver it to Mars and provide the sky crane landing system. Despite the proposed reorganisation, the goals of the 2018 mission opportunity would have stayed broadly the same. Under the FY2013 Budget President Obama released on 13 February 2012, NASA terminated its participation in ExoMars due to budgetary cuts in order to pay for the cost overruns of the

James Webb Space Telescope The James Webb Space Telescope (JWST) is a space telescope which conducts infrared astronomy. As the largest optical telescope in space, its high resolution and sensitivity allow it to view objects too old, distant, or faint for the Hubble Spa ...

. With NASA's funding for this project completely cancelled, most of these plans had to be restructured. On 14 March 2013, representatives of the ESA and the Russian space agency (Roscosmos), signed a deal in which Russia became a full partner. Roscosmos will supply both missions with Proton launch vehicles with Briz-M upper stages and launch services, as well as an additional entry, descent and landing module for the rover mission in 2018. Under the agreement, Roscosmos was granted three asking conditions: # Roscosmos will contribute two Proton launch vehicles as payment for the partnership. # The Trace Gas Orbiter payload shall include two Russian instruments that were originally developed for Fobos-Grunt. # All scientific results must be intellectual property of the European Space Agency and the Russian Academy of Sciences (i.e. Roscosmos will be part of all the project teams and will have full access to research data). ESA had originally cost-capped the ExoMars projects at €1 billion, ( USD 1.3 billion) but the withdrawal of the U.S. space agency ( NASA) and the consequent reorganisation of the ventures will probably add several hundred million euros to the sum so far raised. So in March 2012, member states instructed the agency's executive to look at how this shortfall could be made up. One possibility is that other science activities within ESA may have to step back to make ExoMars a priority. In September 2012 it was announced that new ESA members, Poland and Romania, will be contributing up to €70 million to the ExoMars mission. ESA has not ruled out a possible partial return of NASA to the 2018 portion of ExoMars, albeit in a relatively minor role. Russia's financing of ExoMars could be partially covered by insurance payments of 1.2 billion rubles (US$40.7 million) for the loss of Fobos-Grunt, and reassigning funds for a possible coordination between the Mars-NET and ExoMars projects. On 25 January 2013, Roscosmos fully funded the development of the scientific instruments to be flown on the first launch, the Trace Gas Orbiter (TGO). As of March 2014, the lead builder of the ExoMars rover, the British division of

Airbus Defence and Space Airbus Defence and Space is the division of Airbus SE responsible for the development and manufacturing of the corporation's defence and space products, while also providing related services. The division was formed in January 2014 during the ...

, had started procuring critical components, but the 2018 rover mission was still short by more than 100 million euros, or $138 million. The wheels and suspension system are paid by the

Canadian Space Agency The Canadian Space Agency (CSA; french: Agence spatiale canadienne, ASC) is the national space agency of Canada, established in 1990 by the ''Canadian Space Agency Act''. The president is Lisa Campbell, who took the position on September 3, 2020 ...

and are being manufactured by MDA Corporation in Canada.

2016 first spacecraft launch

The spacecraft containing ExoMars Trace Gas Orbiter (TGO) and ''Schiaparelli'' launched on 14 March 2016 09:31 UTC (

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began at 08:30 GMT 3:30 AM EDT. Four rocket burns occurred in the following 10 hours before the descent module and orbiter were released. Signals from the Orbiter were successfully received at 21:29 GMT of the same day, which confirmed that the launch was fully successful and that the spacecraft was on its way to Mars. Shortly after separation from the probes, the Briz-M upper booster stage possibly exploded a few kilometers away, however apparently without damaging the orbiter or lander. The spacecraft, which housed the Trace Gas Orbiter and the ''Schiaparelli'' lander, took its nominal orbit towards Mars and was seemingly in working order. Over the next two weeks, controllers continued to check and commission its systems, including the power, communications, startrackers, and guidance and navigation system.

Delays and suspension

Cmglee Cambridge Science Festival 2015 ExoMars Rover

In January 2016 it was announced that the financial situation of the 2018 mission 'might' require a 2-year delay. Italy is the largest contributor to ExoMars, and the UK is the mission's second-largest financial backer. The rover was scheduled to launch in 2018 and land on Mars in early 2019, but in May 2016 ESA announced that the launch would occur in 2020 due to delays in European and Russian industrial activities and deliveries of the scientific payload. On 12 March 2020, it was announced that the second mission was being delayed to launch in 2022 due to the vehicle not being ready for launch in 2020, with delays exacerbated by travel restrictions during the COVID-19 pandemic. On 28 February 2022, it was announced that the second mission launching in 2022 "was very unlikely" due to the sanctions on Russia in response to the invasion of Ukraine by Russia. On 17 March 2022, the ExoMars rover was permanently suspended.

Mission objectives

The scientific objectives, in order of priority, are: * to search for possible

biosignature A biosignature (sometimes called chemical fossil or molecular fossil) is any substance – such as an element, isotope, or molecule – or phenomenon that provides scientific evidence of past or present life. Measurable attribute ...

s of past Martian life. * to characterise the water and

geochemical Geochemistry is the science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems such as the Earth's crust and its oceans. The realm of geochemistry extends beyond the Earth, encompassing the e ...

distribution as a function of depth in the shallow subsurface. * to study the surface environment and identify hazards to future

human missions to Mars The idea of sending humans to Mars has been the subject of aerospace engineering and scientific studies since the late 1940s as part of the broader exploration of Mars. Some have also considered exploring the Martian moons of Phobos and Deim ...

. * to investigate the planet's subsurface and deep interior to better understand the evolution and habitability of Mars. * achieve incremental steps ultimately culminating in a sample return flight. The technological objectives to develop are: * landing of large

payloads Payload is the object or the entity which is being carried by an aircraft or launch vehicle. Sometimes payload also refers to the carrying capacity of an aircraft or launch vehicle, usually measured in terms of weight. Depending on the nature of ...

on Mars. * to exploit

solar electric power Solar energy is radiant light and heat from the Sun that is harnessed using a range of technologies such as solar power to generate electricity, solar thermal energy (including solar water heating), and solar architecture. It is an essenti ...

on the surface of Mars. * to access the subsurface with a drill able to collect samples down to a depth of * to develop surface exploration capability using a rover.

Mission profile

ExoMars is a joint programme of the

(ESA) and the Russian space agency Roscosmos. According to current plans, the ExoMars project will comprise four spacecraft: two stationary landers, one orbiter and one rover. All mission elements will be sent in two launches using two heavy-lift

Proton A proton is a stable subatomic particle, symbol , H+, or 1H+ with a positive electric charge of +1 ''e'' elementary charge. Its mass is slightly less than that of a neutron and 1,836 times the mass of an electron (the proton–electron mass ...

rockets. The two landing modules and the rover will be cleaned and sterilised to prevent contaminating Mars with Earth life forms, and also to ensure that any biomolecules detected were not carried from Earth. Cleaning will require a combination of sterilising methods, including

ionising radiation Ionizing radiation (or ionising radiation), including nuclear radiation, consists of subatomic particles or electromagnetic waves that have sufficient energy to ionize atoms or molecules by detaching electrons from them. Some particles can travel ...

, UV radiation, and chemicals such as ethyl and isopropyl alcohol. (see Planetary protection).

First launch (2016)

Trace Gas Orbiter

The Trace Gas Orbiter (TGO) is a Mars telecommunications orbiter and atmospheric gas analyzer mission that was launched on 14 March 2016 09:31 UTC. The spacecraft arrived in the Martian orbit in October 2016. It delivered the ExoMars Schiaparelli EDM lander and then proceed to map the sources of

methane on Mars The reported presence of methane in the atmosphere of Mars is of interest to many geologists and astrobiologists, as methane may indicate the presence of microbial life on Mars, or a geochemical process such as volcanism or hydrothermal activity ...

and other gases, and in doing so, will help select the landing site for the ExoMars

rover Rover may refer to: People * Constance Rover (1910–2005), English historian * Jolanda de Rover (born 1963), Dutch swimmer * Rover Thomas (c. 1920–1998), Indigenous Australian artist Places * Rover, Arkansas, US * Rover, Missouri, US * ...

to be launched in 2022. The presence of methane in Mars's atmosphere is intriguing because its likely origin is either present-day life or geological activity. Upon the arrival of the rover in 2023, the orbiter would be transferred into a lower orbit where it would be able to perform analytical science activities as well as provide the ExoMars rover with a telecommunication relay. NASA provided an ''Electra'' telecommunications relay and navigation instrument to ensure communications between probes and rovers on the surface of Mars and controllers on Earth. The TGO would continue serving as a telecommunication relay satellite for future landed missions until 2022.

''Schiaparelli'' EDM lander

The Entry, Descent and Landing Demonstrator Module (EDM) called ''Schiaparelli'', was intended to provide the

(ESA) and Russia's Roscosmos with the technology for landing on the surface of Mars. It was launched together with the ExoMars Trace Gas Orbiter (TGO) on 14 March 2016, 09:31 UTC and was scheduled to land softly on 19 October 2016. No signal indicating a successful landing was received, and on 21 October 2016 NASA released a Mars Reconnaissance Orbiter

image An image is a visual representation of something. It can be two-dimensional, three-dimensional, or somehow otherwise feed into the visual system to convey information. An image can be an artifact, such as a photograph or other two-dimensiona ...

showing what appears to be the lander crash site. The lander was equipped with a non-rechargeable electric battery with enough power for four sols. The soft landing should have taken place on Meridiani Planum during the dust storm season, which would have provided a unique chance to characterise a dust-loaded atmosphere during entry and descent, and to conduct surface measurements associated with a dust-rich environment. Once on the surface, it was to measure the wind speed and direction, humidity, pressure and surface temperature, and determine the transparency of the atmosphere. It carried a surface payload, based on the proposed meteorological DREAMS (Dust Characterisation, Risk Assessment, and Environment Analyser on the Martian Surface) package, consists of a suite of sensors to measure the wind speed and direction (MetWind), humidity (MetHumi), pressure (MetBaro), surface temperature (MarsTem), the transparency of the atmosphere (Optical Depth Sensor; ODS), and atmospheric electrification (Atmospheric Radiation and Electricity Sensor; MicroARES). F. Esposito, ''et al.,'
DREAMS for the ExoMars 2016 mission: a suite of sensors for the characterisation of Martian environment"
(PDF). European Planetary Science Congress 2013, EPSC Abstracts Vol. 8, EPSC2013-815 (2013) The DREAMS payload was to function for 2 or 3 days as an environmental station for the duration of the EDM surface mission after landing.

Second launch (2028)

The ExoMars 2022 mission was planned for launch during a twelve-day launch window starting on 20 September 2022, and scheduled to land on Mars on 10 June 2023. It would have included a German-built cruise stage and Russian descent module. On 28 February 2022, the ESA announced that, as a result of sanctions related to the

2021–2022 Russo-Ukrainian crisis In March and April 2021, Russian president Vladimir Putin ordered the Russian military to begin massing thousands of personnel and equipment near its border with Ukraine and in Crimea, representing the largest mobilization since the annex ...

, a 2022 launch is "very unlikely." On 28 March 2022, the ExoMars rover was confirmed to be technically ready for launch, but the 2022 launch window for the mission is no longer possible due to the Russian invasion of Ukraine. The launch of a revised version of the mission, using a new non-Russian landing platform, is expected to occur no earlier than 2028.

Cruise stage

The Kazachok lander and Rosalind Franklin rover will be sent Mars inside the descent module. The descent module will be attached to the carrier module, which will provide power, propulsion, and navigation. The carrier module has 16 hydrazine powered thrusters, 6 solar arrays that will provide electricity, and sun sensors and star trackers for navigation. It was developed and built by OHB System in Bremen, Germany. The carrier module will separate from the descent module right before the rest of the spacecraft arrives at Mars.

''Kazachok'' lander and descent stage

''Kazachok'' is an 1800 lbs (827.9 kg) Russian-built lander that is derived from the 2016 ''Schiaparelli'' EDM lander. It will place the ''Rosalind Franklin'' rover on the surface of Mars. ''Kazachok'' lander will be built 80% by the Russian company Lavochkin, and 20% by ESA. Lavochkin will produce most of the landing system's hardware, while ESA will handle elements such as the guidance, radar and navigation systems. Lavochkin's current landing strategy is to use two parachutes; one will open while the module is still moving at supersonic speed, and another will deploy once the probe has been slowed down to subsonic velocity. The

heat shield In thermodynamics, heat is defined as the form of energy crossing the boundary of a thermodynamic system by virtue of a temperature difference across the boundary. A thermodynamic system does not ''contain'' heat. Nevertheless, the term is al ...

will eventually fall away from the entry capsule to allow the ExoMars rover, riding its retro-rocket-equipped lander, to come for a soft landing on legs or struts. The lander will then deploy ramps for the rover to drive down. Critics have stated that while Russian expertise may be sufficient to provide a launch vehicle, it does not currently extend to the critical requirement of a landing system for Mars. After landing on Mars in June 2023, the rover was intended to descend from the ''Kazachok'' lander via a ramp. The lander was expected to image the landing site, monitor the climate, investigate the atmosphere, analyse the radiation environment, study the distribution of any subsurface water at the landing site, and perform geophysical investigations of the internal structure of Mars. Following a March 2015 request for the contribution of scientific instruments for the landing system, there will be 13 instruments. Examples of the instruments on the lander include the HABIT (HabitAbility: Brine, Irradiation and Temperature) package, the METEO meteorological package, the MAIGRET magnetometer, and the LaRa (Lander Radioscience) experiment. The stationary lander was expected to operate for at least one Earth year, and its instruments would have been powered by solar arrays.

''Rosalind Franklin'' rover

ExoMars's ''Rosalind Franklin'' rover was due to land in June 2023 and to navigate autonomously across the Martian surface before it was cancelled in 2022 as a response to the Russian invasion of Ukraine that began that year. Instrumentation would consist of the exobiology laboratory suite, known as "Pasteur analytical laboratory" to look for signs of

biomolecule A biomolecule or biological molecule is a loosely used term for molecules present in organisms that are essential to one or more typically biological processes, such as cell division, morphogenesis, or development. Biomolecules include large ...

s and

s from past life. Among other instruments, the rover will also carry a sub-surface core drill to pull up samples for its on-board laboratory. The would will have a mass of about . The ''Rosalind Franklin'' rover includes the Pasteur instrument suite, including the

Mars Organic Molecule Analyzer The Mars Organic Molecule Analyser (MOMA) is a mass spectrometer-based instrument on board the ''Rosalind Franklin'' rover to be launched in 2028 to Mars on an astrobiology mission.

(RLS). Examples of external instruments on the rover include: *

Mars Multispectral Imager for Subsurface Studies Mars Multispectral Imager for Subsurface Studies (MA-MISS) is a miniaturized imaging spectrometer designed to provide imaging and spectra by reflectance in the near-infrared (NIR) wavelength region and determine the mineral composition and stratig ...

Infrared Spectrometer for ExoMars Infrared Spectrometer for ExoMars (ISEM) is an infrared spectrometer for remote sensing that is part of the science payload on board the European Space Agency ''Rosalind Franklin'' rover, tasked to search for biosignatures and biomarkers on Mars. ...

ADRON-RM ADRON-RM (Autonomous Detector of Radiation of Neutrons Onboard Rover at Mars) is a Neutron spectroscopy, neutron spectrometer to search for Water on Mars#Ground ice, subsurface water ice and Mineral hydration, hydrated minerals. This analyser is ...

Landing site selection

NASA-OxiaPlanum-GeologicalContext-Morphology-20140514

A primary goal when selecting the rover's landing site is to identify a particular geologic environment, or set of environments, that would support —now or in the past— microbial life. The scientists prefer a landing site with both morphologic and mineralogical evidence for past water. Furthermore, a site with spectra indicating multiple hydrated minerals such as

clay minerals Clay minerals are hydrous aluminium phyllosilicates (e.g. kaolin, Al2 Si2 O5( OH)4), sometimes with variable amounts of iron, magnesium, alkali metals, alkaline earths, and other cations found on or near some planetary surfaces. Clay mineral ...

is preferred, but it will come down to a balance between engineering constraints and scientific goals. Engineering constraints call for a flat landing site in a latitude band straddling the equator that is only 30° latitude from top to bottom because the rover is solar-powered and will need best sunlight exposure. The landing module carrying the rover will have a landing ellipse that measures about 105 km by 15 km. Scientific requirements include landing in an area with 3.6 billion years old sedimentary rocks that are a record of the past wet habitable environment. The year before launch, the European Space Agency will make the final decision. By March 2014, the long list was: * Aram Dorsum * Coogoon Valles *

Hypanis Vallis The Hypanis Valles are a set of channels in a 270 km valley in Xanthe Terra on Mars at 11° N, 314° E, in the Lunae Palus quadrangle. They appear to have been carved by long-lived flowing water, and a significant deposit (interpreted by som ...

* Mawrth Vallis * Oxia Planum *

Simud Valles The Simud Valles are an ancient outflow channel system in the Oxia Palus quadrangle of Mars, located at 19.8° N and 37.8° W. They are 945 km long and were named for the word for "Mars" in Sumerian. Note: Descriptor term changed to the plural ...

* Southern Isidis Following additional review by an ESA-appointed panel, four sites, all of which are located relatively near the equator, were formally recommended in October 2014 for further detailed analysis: * Aram Dorsum *

* Mawrth Vallis * Oxia Planum On 21 October 2015, Oxia Planum was reported to be the preferred landing site for the

ExoMars rover ''Rosalind Franklin'', previously known as the ExoMars rover, is a planned robotic Mars rover, part of the international ExoMars programme led by the European Space Agency and the Russian Roscosmos State Corporation. The mission was scheduled ...

. The delay of the rover mission to 2020 from 2018 meant that Oxia Planum was no longer the only favourable landing site due to changes in the possible landing ellipse. Both Mawrth Vallis and Aram Dorsum, surviving candidates from the previous selection, could be reconsidered. ESA convened further workshops to re-evaluate the three remaining options and in March 2017 selected two sites to study in detail. * Mawrth Vallis * Oxia Planum On 9 November 2018, ESA announced that Oxia Planum was favoured by the Landing Site Selection Working Group. The favored Oxia Planum landing ellipse is situated at 18.20°N, 335.45°E. In 2019, Oxia Planum was confirmed by ESA as the landing site for the planned 2020 mission. Later that year, a flyover video of the landing site was released, created using high-accuracy 3D models of the terrain obtained from HiRISE. As of July 2020, it has not been stated by ESA if the choice of landing site will be affected by the delay of the mission beyond 2022, similar to the re-evaluation prompted by the first delay in 2018.

References

External links

*
ExoMars Space Research Institute of Russian Academy of Science site

ESA main web site

at RussianSpaceWeb.com

('' The New York Times''; 16 October 2016)
Animated video of ExoMars

ExoMars article on eoPortal by ESA
{{Use British English, date=January 2014 Missions to Mars European Space Agency programmes European Space Agency space probes Astrobiology space missions 2016 in spaceflight 2028 in spaceflight Russian space probes Roscosmos