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The Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight)[1] mission is a robotic lander designed to study the deep interior of the planet Mars.[1][12][13] It was manufactured by Lockheed Martin, is managed by NASA's Jet Propulsion Laboratory, and most of its scientific instruments were built by European agencies. The mission launched on 5 May 2018 at 11:05 UTC aboard an Atlas V-401 rocket[5] and successfully landed[14] at Elysium Planitia on Mars on 26 November 2018 at 19:52:59 UTC.[15][16][5][17] InSight traveled 483 million km (300 million mi) during its journey.[18]

InSight
InSight spacecraft model.png
MarCO duo spacecraft model.png
Top: Artist's rendering of the InSight lander
Bottom: Artist's rendering of the MarCO CubeSats
NamesInterior Exploration using Seismic Investigations, Geodesy and Heat Transport
Geophysical Monitoring Station
Discovery 12
Mission typeMars lander
OperatorNASA / JPL
COSPAR ID2018-042A
SATCAT no.43457
WebsiteMars.NASA.gov/InSight
Mission durationPlanned: 709 sols (728 days)[1][2]
Current: 198 sols (202 days) since landing
Spacecraft properties
ManufacturerLockheed Martin Space Systems
Launch mass694 kg (1,530 lb)[3]
Landing mass358 kg (789 lb)[3]
DimensionsDeployed: 6.0 × 1.56 × 1.0 m (19.7 × 5.1 × 3.3 ft)[4]-
Power600 W, solar / Li-ion battery[3]
Start of mission
Launch date5 May 2018, 11:05 (2018-05-05UTC11:05) UTC[5][6]
RocketAtlas V 401[7]
Launch siteVandenberg SLC-3E[7]
ContractorUnited Launch Alliance
Mars lander
Landing date26 November 2018, 19:52:59 (2018-11-26UTC19:52:59) UTC[2]
Landing siteElysium Planitia[8][9]
4°30′09″N 135°37′24″E / 4.5024°N 135.6234°E / 4.5024; 135.6234 (InSight landing site)[10]
Flyby of Mars
Spacecraft componentMars Cube One (MarCO)
Closest approach26 November 2018, 19:52:59 (2018-11-26UTC19:52:59) UTC[2]
Distance3,500 km (2,200 mi)[11]
InSight Mission Logo.svg
← GRAIL
Lucy →
 

InSight's objectives are to place a seismometer, called SEIS, on the surface of Mars to measure seismic activity and provide accurate 3D models of the planet's interior; and measure internal heat flow using a heat probe called HP3 to study Mars' early geological evolution.[19] This could bring a new understanding of how the Solar System's terrestrial planets – Mercury, Venus, Earth, Mars – and Earth's Moon form and evolve.

The lander was originally planned for launch in March 2016.[13][20] Following a persistent vacuum failure in the SEIS instrument prior to launch, with the 2016 launch window missed, InSight was returned to Lockheed Martin's facility in Denver, Colorado, for storage. NASA officials decided in March 2016 to delay launching InSight to May 2018.[6] This allowed time for the seismometer to be fixed, although it increased the total cost from US$675 million to US$830 million.[21] By reusing technology from the Mars Phoenix lander, which successfully landed on Mars in 2008, mission costs and risks were reduced.[22]

Contents

HistoryEdit

Discovery Program selectionEdit

 
InSight comes together with the backshell and surface lander being joined, 2015.

InSight was initially known as GEMS (Geophysical Monitoring Station), but its name was changed in early 2012 following a request by NASA.[23] Out of 28 proposals from 2010,[24] it was one of the three Discovery Program finalists receiving US$3 million in May 2011 to develop a detailed concept study.[25] In August 2012, InSight was selected for development and launch.[13] Managed by NASA's Jet Propulsion Laboratory (JPL) with participation from scientists from several countries, the mission was cost-capped at US$425 million, not including launch vehicle funding.[26]

Schedule issuesEdit

Lockheed Martin began construction of the lander on 19 May 2014,[27] with general testing starting in 27 May 2015.[28]

A persistent vacuum leak in the CNES-supplied seismometer known as the Seismic Experiment for Interior Structure (SEIS) led NASA to postpone the planned launch in March 2016 to May 2018. When InSight was delayed, the rest of the spacecraft was returned to Lockheed Martin's factory in Colorado for storage, and the Atlas V rocket intended to launch the spacecraft was reassigned to the WorldView-4 mission.[29]

On 9 March 2016, NASA officials announced that InSight would be delayed until the 2018 launch window at an estimated cost of US$150 million.[6][30] The spacecraft was rescheduled to launch on 5 May 2018 for a Mars landing on 26 November at 3 p.m. The flight plan remained unchanged with launch using an Atlas V rocket from Vandenberg Air Force Base in California.[6][30] NASA's Jet Propulsion Laboratory was tasked with redesigning and building a new vacuum enclosure for the SEIS instrument, while CNES conducted instrument integration and testing.[31][32]

On 22 November 2017 InSight completed testing in a thermal vacuum, also known as TVAC testing, where the spacecraft is put in simulated space conditions with reduced pressure and various thermal loads.[33] On 23 January 2018, after a long storage, its solar panels were once again deployed and tested, and a second silicon chip containing 1.6 million names from the public was added to the lander.[34]

Science backgroundEdit

 
The Apollo 11 seismometer, 1969

VibrationsEdit

Seismometers on both Viking spacecraft were mounted on the lander, and picked up vibrations from various operations of the lander and from the wind.[35] However, the Viking 1 lander's seismometer did not deploy properly in 1976 after it landed; the seismometer remained locked and did not unlock. The Viking 2 seismometer did unlock, and was able to vibrate and return data to Earth.[36][37] One problem was accounting for other data, as this was the issue with an event detected on Sol 80 by the Viking 2 seismometer.[38] When this event was recorded, no wind data were recorded at the same time, so it was not possible to determine if the data indicated a seismic event or wind gust. However, for the Sol 80 event the main problem was not wind noise per se, but rather a lack of other data to rule out other sources of vibrations.[39] Two other problems were the location of the lander and that a certain level of wind on Mars caused a loss of sensitivity for the Viking 2 seismometer.[40] InSight has many other sensors, is placed directly on the surface, and also has a wind shield.

Despite the difficulties, the Viking 2 seismometer readings were used to estimate a Martian geological crust thickness between 14 and 18 km (8.7 and 11.2 mi) at the Viking 2 lander site.[41] The Viking 2 seismometer did detect vibrations from Mars winds complementing the meteorology results.[41][42] There was the aforementioned candidate for a possible marsquake, but is not particularly definitive. The wind data did prove useful in its own right, and despite the limitations of the data, widespread and large marsquakes were not detected.[43]

Seismometers were also left on the Moon, starting with Apollo 11 in 1969, and also by Apollo 12, 14, 15 and 16 missions and provided many insights into lunar seismology, including the discovery of moonquakes.[44][45] The Apollo seismic network, which was operated until 1977, detected at least 28 moonquakes up to 5.5 on the Richter scale.[46]

One of the aspects of the InSight mission is to compare the Earth, Moon, and Mars seismic data to learn more.[47]

Well, seismic investigation is really the heart of this mission. Seismology is the method that we've used to gain almost everything we know, all the basic information about the interior of the Earth, and we also used it back during the Apollo era to understand and to measure sort of the properties of the inside of the moon. And so, we want to apply the same techniques but use the waves that are generated by Mars quakes, by meteorite impacts to probe deep into the interior of Mars all the way down to its core.

— Gravity Assist: Mars and InSight with Bruce Banerdt (May 3, 2018)[48]

NutationEdit

Radio Doppler measurements were taken with Viking and twenty years later with Mars Pathfinder, and in each case the axis of rotation of Mars was estimated. By combining this data the core size was constrained, because the change in axis of rotation over 20 years allowed a precession rate and from that the planet's moment of inertia to be estimated.[49] InSight's measurements of crust thickness, mantle viscosity, core radius and density, and seismic activity should result in a three- to tenfold increase in accuracy compared to current data.[50]

ObjectivesEdit

The InSight mission placed a single stationary lander on Mars to study its deep interior and address a fundamental issue of planetary and Solar System science: understanding the processes that shaped the rocky planets of the inner Solar System (including Earth) more than four billion years ago.[51]

 
Comparison of the interiors of Earth, Mars and the Moon (artist concept)

InSight's primary objective is to study the earliest evolutionary history of the processes that shaped Mars. By studying the size, thickness, density and overall structure of Mars' core, mantle and crust, as well as the rate at which heat escapes from the planet's interior, InSight will provide a glimpse into the evolutionary processes of all of the rocky planets in the inner Solar System.[52][51] The rocky inner planets share a common ancestry that begins with a process called accretion. As the body increases in size, its interior heats up and evolves to become a terrestrial planet, containing a core, mantle and crust.[53] Despite this common ancestry, each of the terrestrial planets is later shaped and molded through a poorly understood process called differentiation. InSight mission's goal is to improve the understanding of this process and, by extension, terrestrial evolution, by measuring the planetary building blocks shaped by this differentiation: a terrestrial planet's core, mantle and crust.[53]

 
InSight lander on Mars (artist concept)

The mission will determine if there is any seismic activity, measure the rate of heat flow from the interior, estimate the size of Mars' core and whether the core is liquid or solid.[54] This data would be the first of its kind for Mars.[50] It is also expected that frequent meteor airbursts (10–200 detectable events per year for InSight) will provide additional seismo-acoustic signals to probe the interior of Mars.[55] The mission's secondary objective is to conduct an in-depth study of geophysics, tectonic activity and the effect of meteorite impacts on Mars, which could provide knowledge about such processes on Earth. Measurements of crust thickness, mantle viscosity, core radius and density, and seismic activity should result in a three- to tenfold increase in accuracy compared to current data.[50] This is the first time a robotic lander dug this deep into the martian crust.

In terms of fundamental processes shaping planetary formation, it is thought that Mars contains the most in-depth and accurate historical record, because it is big enough to have undergone the earliest accretion and internal heating processes that shaped the terrestrial planets, but is small enough to have retained signs of those processes.[51] The science phase is expected to last for two years.[1]

DesignEdit

 
The InSight lander with solar panels deployed in a cleanroom

The mission further develops a design based on the 2008 Phoenix Mars lander.[56] Because InSight is powered by solar panels, it landed near the equator to enable maximum power for a projected lifetime of two years (1 Martian year).[1] The mission includes two relay microsatellites called Mars Cube One (MarCO) that launched with InSight but were flying in formation with InSight to Mars.[57]

Three major aspects to the InSight spacecraft are the cruise stage, the entry, descent, and landing system, and the lander.[58]

Overall specificationsEdit

Mass
  • Total mass during cruise: 694 kg (1,530 lb)[3]
    • Lander: 358 kg (789 lb)[3]
    • Aeroshell: 189 kg (417 lb)[3]
    • Cruise stage: 79 kg (174 lb)[3]
    • Propellant and pressurant: 67 kg (148 lb)[3]
  • Relay probes flew separately but they weighed 13.5 kg (30 lb) each (there were 2)[3]

Lander specificationsEdit

  • Lander mass (Earth weight): 358 kg (789 lb)[3]
    • Mars weight (0.376 of Earth's)[59] : 134.608 kg (296.76 lb)
  • About 6.0 m (19.7 ft) wide with solar panels deployed.[3]
  • The science deck is about 1.56 m (5.1 ft) wide and between 0.83 and 1.08 m (2.7 and 3.5 ft) high (depending on leg compression after landing).[3]
  • The length of the robotic arm is 2.4 m (7.9 ft)[3]
  • Tilt of lander at landing on Mars: 4 degrees[60]
Power
 
Comparison of single-sol energy generated by various probes on Mars. (30 November 2018)
Power is generated by two round solar panels, each 2.15 m (7.1 ft) in diameter and consisting of SolAero ZTJ triple-junction solar cells made of InGaP/InGaAs/Ge arranged on Orbital ATK UltraFlex arrays. After touchdown on the Martian surface, the arrays are deployed by opening like a folding fan.[61]
  • Rechargeable batteries[62]
  • Solar panels yielded 4.6 kilowatt-hours on Sol 1[63]
  • Each panel is 7 feet in diameter (2.2 meters) unfurled

PayloadEdit

 
InSight lander with labeled instruments
 
InSight collecting weather data (artist concept)[64][65]

InSight's lander payload has a total mass of 50 kg, including science instruments and support systems such as the Auxiliary Payload Sensor Suite, cameras, the instrument deployment system, and a laser retroreflector.[3]

InSight performs three major experiments using SEIS, HP3 and RISE.[66] SEIS is a very sensitive seismometer, measuring vibrations; HP3 involves a burrowing probe to measure the thermal properties of the subsurface.[66] RISE uses the radio communication equipment on the lander and on Earth to measure the overall movement of planet Mars that could reveal the size and density of its core.

Test of the 2.4 meter long Instrument Deployment Arm, seen deploying SEIS
HP3 on the lander deck on Sol 10.
HP3 diagram
The TWINS meteorological sensor

The two relay 6U cubesats were part of the overall InSight program, and were launched at the same time as the lander but they were attached to the centaur upper stage (InSight's second stage in the launch).[83] They were ejected from the stage after launch and coasted to Mars independent of the main InSight cruise stage with the lander.[84]

Journey to MarsEdit

LaunchEdit

On 28 February 2018, InSight was shipped via C-17 cargo aircraft from the Lockheed Martin Space Systems building in Denver to the Vandenberg Air Force Base in California in order to be integrated to the launch vehicle.[85] The lander was launched on 5 May 2018 and arrived on Mars at approximately 19:54 UTC on 26 November 2018.

 
Launch of the Atlas V rocket carrying InSight and MarCO from Vandenberg Space Launch Complex 3-E.

The spacecraft was launched on 5 May 2018 at 11:05 UTC on an Atlas V 401 launch vehicle (AV-078) from Vandenberg Air Force Base Space Launch Complex 3-East.[5] This was the first American interplanetary mission to launch from California.[86]

The launch was managed by NASA's Launch Services Program. InSight was originally scheduled for launch on 4 March 2016 on an Atlas V 401 (4 meter fairing/zero (0) solid rocket boosters/single (1) engine Centaur) from Vandenberg Air Force Base in California, U.S.,[86] but was called off in December 2015 due to a vacuum leak on the SEIS instrument.[87][88][89] The rescheduled launch window ran from 5 May to 8 June 2018.

Major components of the launch vehicle include:

  • Common Core Booster
  • This launch did not use additional solid rocket boosters
  • Centaur with Relay cubsats
  • InSight in a Payload fairing


The journey to Mars took 6.5 months across 484 million km (301 million mi) for a touchdown on 26 November.[5][17] After a successful landing, a three-month-long deployment phase commenced as part of its two-year (a little more than one Martian year) prime mission.[90][91]


Service Tower Rolls Back
Pre-Launch
InSight heading to space

CruiseEdit

 
Animation of InSight's trajectory from 5 May 2018 to 26 November 2018
   InSight ·   Earth ·   Mars

After its launch from Earth on the 5th of May in 2018, it coasted through interplanetary space for 6.5 months traveling across 484 million km (301 million mi) for a touchdown on the 26th November in that year.[5][17]

InSight cruise stage departed Earth at a speed of 6,200 miles per hour (10,000 kilometers per hour).[92] The MarCo probes were ejected from the 2nd stage Centaur booster and traveled to Mars independent of the InSight cruise stage, but they were all launched together

During the cruise to Mars, the InSight cruise stage made several course adjustments, and the first of these (TCM-1) took place on May 22, 2018.[93] The cruise stage that carries the lander includes solar panels, antenna, star trackers, sun sensor, inertial measurement unit among its technologies.[94] The thrusters are actually on the InSight lander itself, but there are cutouts in the shell so the relevant rockets can vent into space.[95]

The final course correction was November 25, 2018, the day before its touch down.[96] A few hours before making contact with the Martian atmosphere, the cruise stage was jettisoned, on 26 November 2018.[97]

InSight on way to Mars
Exterior (artist concept)
Interior

Entry, Descent, and LandingEdit

First light on the surface of Mars from the Instrument Context Camera (ICC, left) and the Instrument Deployment Camera (IDC, right)
November 26, 2018 (Touch down-day // Sol 0)

On 26 November 2018, at approximately 19:53 UTC, mission controllers received a signal via the Mars Cube One (MarCO) satellites that the spacecraft had successfully touched down[14] at Elysium Planitia.[5][15][17] After landing, the mission will take three months to deploy and commission the geophysical science instruments.[90][91] It will then begin its mission of observing Mars, which is planned to last for two years.[1]

The mass that entered the atmosphere of Mars was 1,340 pounds (608 kilograms) .[98]

There are three major stages to InSight's landing:[99]

  • Entry: after separating from the cruise stage the aeroshell enters the atmosphere and is subject to air and dust in the Martian atmosphere
  • Parachute descent: a certain speed and altitude a parachute is deployed to slow the lander further
  • Rocket descent: closer to the ground the parachute is ejected and the lander uses rocket engines to slow the lander before touchdown

Landing sequence:[100]

  • 25 November 2018 final course correction before EDL
  • 26 November 2018 Cruise stage jettisoned before entering atmosphere
  • Several minutes later aeroshell containing lander makes contact with upper Martian atmosphere at 12,300 mph (5.5 kilometers per second).
    • At this point it is 80 miles (about 128 kilometers) above Mars and in the next few minutes it lands, but undergoes many stages.[101]
  • Aeroshell is heated to 2,700 degrees Fahrenheit (1,500 degrees Celsius) during descent, Martian atmosphere is used to slow down.
  • At 861 mph (385 meters per second) and ~36,400 feet (11,100 meters) above the surface, the parachute is deployed
  • Several seconds later the heat shield is jettisoned from the lander
  • The landing legs extended
  • Landing radar activated
  • Backshell jettisoned at speed of about 134 mph (60 meters per second) and 3,600 feet (1,100 meters) altitude
  • Landing rockets turned on
  • Roughly 164 feet (50 meters) from the ground constant velocity mode is entered
  • Approaches ground at about 5 mph (2 meters per second)
  • Touchdown—each of the three lander legs have a sensor to detect ground contact
  • Descent rockets are turned off at touchdown
  • Begin surface operations

The lander's mass is about 358 kg (789 lb)[3] but on Mars, which has 0.376 of Earth's[102] gravity, it will only weigh the equivalent of a 135 kg (298 lb) object on Earth.

InSight cruise stage and lander separate prior to landing
Touchdown on Elysium Planitia (animation)
A simulated view of NASA's InSight lander about to land on the surface of Mars.

On 26 November 2018 InSight successfully touched down in Elysium Plantia.[14]

A few hours after landing, NASA's 2001 Mars Odyssey orbiter relayed signals indicating that InSight's solar panels had successfully unfurled and are generating enough electrical power to recharge its batteries daily. Odyssey also relayed a pair of images showing InSight's landing site.[103] More images would be taken in stereo pairs to create 3D images, allowing InSight to find the best locations on the surface to place the heat probe and seismometer. Over the next few weeks, InSight would check health indicators and monitor both weather and temperature conditions at the landing site.[90]

After InSight landing (14 December 2018)
Pits made by thrusters (contrast-enhanced without color-correction)
Soil churned by thrusters

Landing siteEdit

 
InSight Lander - panorama (9 December 2018)
InSight lander (color-corrected; April 2019)
Sunrise
Clouds (animated)
Sunset

As InSight's science goals are not related to any particular surface feature of Mars, potential landing sites were chosen on the basis of practicality. Candidate sites needed to be near the equator of Mars to provide sufficient sunlight for the solar panels year round, have a low elevation to allow for sufficient atmospheric braking during EDL, flat, relatively rock-free to reduce the probability of complications during landing, and soft enough terrain to allow the heat flow probe to penetrate well into the ground.

An optimal area that meets all these requirements is Elysium Planitia, so all 22 initial potential landing sites were located in this area.[104] The only two other areas on the equator and at low elevation, Isidis Planitia and Valles Marineris, are too rocky. In addition, Valles Marineris has too steep a gradient to allow safe landing.[8] In September 2013, the initial 22 potential landing sites were narrowed down to four, and the Mars Reconnaissance Orbiter was then used to gain more information on each of the four potential sites before a final decision was made.[8][105] Each site consists of a landing ellipse that measures about 130 by 27 km (81 by 17 mi).[106]

In March 2017, scientists from the Jet Propulsion Laboratory announced that the landing site had been selected. It is located in western Elysium Planitia at 4°30′N 135°54′E / 4.5°N 135.9°E / 4.5; 135.9 (InSight landing site).[107] The landing site is about 600 km (370 mi) north from where the Curiosity rover is operating in Gale Crater.[108]

On 26 November 2018 the spacecraft successfully touched down at its landing site,[14] and in early December 2018 InSight lander and EDL components were imaged from space on the surface of Mars.[109] The images provided precise position of the lander: 4°30′09″N 135°37′24″E / 4.5024°N 135.6234°E / 4.5024; 135.6234.[10]

InSight landing zone is in the south and west of this grid, near 4.5 degree North and 136 degrees East, this is south and to the west of Elysium Mons and Eddie crater
Image footprints by HiRise on Mars Reconnaissance Orbiter for studying the planned Insight landing ellipse. From east to west the scale is about 160 km (100 mi)
InSight final landing location (red dot)
(13 December 2018)
Artist's concept depicts NASA's InSight lander after it has deployed its instruments on the Martian surface.
NASA’s InSight spacecraft unlatched its robotic arm on Nov. 27, 2018, the day after it landed on Mars.
InSight on Mars − clear view (open lens cover) of landing area (ICC; 30 November 2018)
InSight parachute, lander, shield (11 December 2018)
InSight parachute, lander, shield
(26 November 2018)
Mars InSight Lander – Full self-portraits
First (11 December 2018)
Second (11 April 2019)

Surface operationsEdit

On 26 November 2018, NASA reported that the InSight lander had landed successfully on Mars. The meteorological suite (TWINS) and magnetometer are operational, and the mission will take up to three months to deploy and commission the geophysical science instruments.[90][91] One of the first critical tasks was to unfurl the solar panels for the batteries to be recharged.[110] After landing, the dust was allowed to settle for a few hours, time during which the solar array motors were warmed up and then the solar panels were unfurled.[111][112] The lander then reported its systems' status, acquired some images, and it powered down to sleep mode for its first night on Mars. On its first sol on Mars it set a new solar power record of 4.6 kilowatt-hours generated for a single Martian day (known as a "sol").[63] This amount is enough to support operations and deploy the sensors.[113]

InSight on the surface of Mars (6 December 2018)
Deck and science instruments
Robotic arm over Martian soil
Robotic arm and deck
One of its two solar panels
Deployment of wind and thermal shield
Deployment of heat probe (HP3)
InSightseismometer deployed, first time onto the surface of another planet (19 December 2018)[114]
Seismometer deployment animation from Instrument Context Camera
Seismometer deployment animation from Instrument Deployment Camera
Seismometer deployed
Wind and thermal shield deployed over seismometer (Sol 110)
Lander (green) and shield (white dot) - viewed from space (4 February 2019)

On December 7, 2018 InSight recorded the sounds of Martian winds with SEIS, which is able to record vibrations within human hearing range, although rather low (aka subwoofer-type sounds), and these were sent back to Earth.[115] This was the first time the sound of Mars wind was heard after two previous attempts.[116]

On 19 December 2018, the SEIS instrument was deployed onto the surface of Mars next to the lander by its robotic arm,[114] and it was commissioned on 4 February 2019.[117] After the seismometer became fully operational, the heat probe instrument was deployed on 12 February 2019.[118] [119]

On 28 February 2019, the Heat and Physical Properties Package probe (HP³) started its drilling into the surface of Mars. The probe and its digging mole were intended to reach a maximum depth of 5 m (16 ft) about two months after.

On 7 March 2019, the HP³ instrument’s mole paused its digging. The mole had made it about 30 cm (12 in) or three quarters of the way out of its housing structure and into the ground. Engineers think the mole hit a rock which caused it to make little progress since 2 March 2019. Both NASA and JPL continue to look into the cause of the under-performing tool and for potential solutions. Scientifically useful measurements are possible at a depth of 3 m (9.8 ft). [13]

InSight – Heat Probe problem (June 2019)
Deploying probe
Problem - signs of shifting
Current position
Testing solutions
Possible solution
Prep for solution

In April 2019, NASA reported that the Mars InSight lander detected its first Marsquake.[120][121]

Mars - InSight Lander - Seismic Event (AudioVideoFile; Sol 128; 6 April 2019)

MarCO spacecraftEdit

Flight hardware of Mars Cube One (MarCO) (folded up)
MarCO CubeSats relaying data during InSight's landing (artist concept)

The Mars Cube One (MarCO) spacecraft are a pair of 6U CubeSats that piggybacked with the InSight mission to test CubeSat navigation and endurance in deep space, and to help relay real-time communications (with an eight minute lightspeed delay)[91] during the probe's entry, descent and landing (EDL) phase.[122][123] The two 6U CubeSats, named MarCO A and B, are identical.[124] They were launched along with InSight, but separated soon after reaching space,[125] and they flew as a pair for redundancy while flanking the lander.[57] They did not enter orbit, but flew past Mars during the EDL phase of the mission and relayed InSight's telemetry in real time.[126][127] On 5 February 2019, NASA reported that the CubeSats went silent, and are unlikely to be heard from again.[128]

  • Mass: 13.5 kg (30 lb) each.[3]
  • Dimensions: 30 cm × 20 cm × 10 cm (11.8 in × 7.9 in × 3.9 in) each
  • Each has a reflectarray high gain antenna
  • Miniaturized radio operating in UHF (receive only) and X-band (receive and transmit).[57]
  • They carry a miniature wide-angle camera.[129]
  • Cold gas thrusters for attitude adjustments.[130]
  • Star tracker for navigation.[131]

Team and participationEdit

 
Insight team at JPL

The InSight science and engineering team includes scientists and engineers from many disciplines, countries and organizations. The science team assigned to InSight includes scientists from institutions in the U.S., France, Germany, Austria, Belgium, Canada, Japan, Switzerland, Spain, Poland and the United Kingdom.[132]

Mars Exploration Rover project scientist W. Bruce Banerdt is the principal investigator for the InSight mission and the lead scientist for the SEIS instrument.[133] Suzanne Smrekar, whose research focuses on the thermal evolution of planets and who has done extensive testing and development on instruments designed to measure the thermal properties and heat flow on other planets,[134] is the lead for InSight's HP3 instrument. The Principal Investigator for RISE is William Folkner at JPL.[135] The InSight mission team also includes project manager Tom Hoffman and deputy project manager Henry Stone.[132] Major contributing agencies and institutions are:[78]

 
NASA team cheers as the InSight Lander touches down on Mars. (26 November 2018)[14]

Name chipsEdit

As part of its public outreach, NASA organized a program where members of the public were able to have their names sent to Mars aboard InSight. Due to its launch delay, two rounds of sign-ups were conducted totaling 2.4 million names:[136][137] 826,923 names were registered in 2015[138] and a further 1.6 million names were added in 2017.[139] An electron beam was used to etch letters only ​11000 the width of a human hair onto 8 mm (0.3 in) silicon wafers.[138] The first chip was installed on the lander in November 2015 and the second on 23 January 2018.[138][139]

Name chips on InSight
One name chip installed
The first name chip for InSight
The second name chip, inscribed with 1.6 million names, is placed on InSight in January 2018.
Name chips on Mars

GalleryEdit

Instrument Context Camera (ICC), November 2018
First image from Mars, clear lens cap on
First image with annotations
Without clear lens cover

Context mapEdit

Acheron FossaeAcidalia PlanitiaAlba MonsAmazonis PlanitiaAonia PlanitiaArabia TerraArcadia PlanitiaArgentea PlanumArgyre PlanitiaChryse PlanitiaClaritas FossaeCydonia MensaeDaedalia PlanumElysium MonsElysium PlanitiaGale craterHadriaca PateraHellas MontesHellas PlanitiaHesperia PlanumHolden craterIcaria PlanumIsidis PlanitiaJezero craterLucus PlanumLycus SulciLunae PlanumLyot craterMalea PlanumMaraldi craterMareotis FossaeMareotis TempeMargaritifer TerraMie craterMilankovič craterMoreux craterNepenthes MensaeNereidum MontesNilosyrtis MensaeNoachis TerraOlympica FossaeOlympus MonsPlanum AustralePromethei TerraProtonilus MensaeSirenumSisyphi PlanumSolis PlanumSyria PlanumTantalus FossaeTempe TerraTerra CimmeriaTerra SabaeaTerra SirenumTharsis MontesTractus CatenaTyrrhen TerraUlysses PateraUranius PateraUtopia PlanitiaValles MarinerisVastitas BorealisXanthe Terra 
 Interactive imagemap of the global topography of Mars, overlain with locations of Mars landers and rovers. Hover your mouse to see the names of over 60 prominent geographic features, and click to link to them. Coloring of the base map indicates relative elevations, based on data from the Mars Orbiter Laser Altimeter on NASA's Mars Global Surveyor. Whites and browns indicate the highest elevations (+12 to +8 km); followed by pinks and reds (+8 to +3 km); yellow is 0 km; greens and blues are lower elevations (down to −8 km). Axes are latitude and longitude; Polar regions are noted.
(   Rover  Lander  Future )

See alsoEdit

ReferencesEdit

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External linksEdit

  • InSight NASA
  • InSight NASA – Mars Exploration Program
  • InSight NASA – InSight Raw Images
  • InSight NASA (video/03:31; 18 November 2018; Details)
  • InSight NASA (video/01:38; 26 November 2018; Landing)
  • InSight NASA (video/01:39; 01 December 2018; Wind Sounds)