{"id":13487,"date":"2018-11-27T00:14:20","date_gmt":"2018-11-26T16:14:20","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/nasas-insight-mission-lands-on-mars-to-study-planets-hidden-interior\/"},"modified":"2018-11-27T00:14:20","modified_gmt":"2018-11-26T16:14:20","slug":"nasas-insight-mission-lands-on-mars-to-study-planets-hidden-interior","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/nasas-insight-mission-lands-on-mars-to-study-planets-hidden-interior\/","title":{"rendered":"NASA\u2019s InSight mission lands on Mars to study planet\u2019s hidden interior"},"content":{"rendered":"
\"\"
InSight project manager Tom Hoffman motions to an image captured by the spacecraft minutes after landing on Mars. Credit: NASA\/Bill Ingalls<\/figcaption><\/figure>\n

NASA\u2019s InSight spacecraft plunged into the rarefied atmosphere of Mars at a speed of more than 12,000 mph Monday and braked to a gentle touchdown, setting the stage for a two-year surface mission to probe the planet\u2019s deep interior.<\/p>\n

Cocooned inside a heat shield, the robotic lander weathered extreme temperatures reaching 2,700 degrees Fahrenheit (1,500 degrees Celsius) as it entered the Martian atmosphere, unfurled a supersonic parachute, then pulsed 12 retrorockets up to 10 times every second in the final phase of the descent toward the red planet, finally settling on the surface with three landing legs.<\/p>\n

Controllers confirmed InSight\u2019s landing at 2:54 p.m. EST (11:54 a.m. PST; 1954 GMT), roughly eight minutes after the touchdown actually occurred at Elysium Planitia, a broad equatorial plain selected for its relatively flat surface free of large boulders and craters. It took that long for radio signals from InSight to travel from Mars to Earth, a distance of 91 million miles (146 million kilometers).<\/p>\n

Tense engineers monitored the $993 million mission\u2019s white-knuckle arrival at Mars from a control center at NASA\u2019s Jet Propulsion Laboratory in Pasadena, California, receiving data from the lander via a pair of briefcase-sized CubeSats sent to the red planet with InSight.<\/p>\n

The twin Mars Cube One, or MarCO, microprobes were the first spacecraft of their size to fly to another planet, and the CubeSats were primarily developed as a technology demonstration to pave the way for future interplanetary smallsats.<\/p>\n

But the CubeSats carried a radio to relay data from InSight back to Earth. The innovative miniature radio, the size of a softball, converted UHF signals from InSight to an X-band frequency to transmit to the ground.<\/p>\n

Engineers were not sure the MarCO CubeSats would work, so InSight\u2019s planners had two other ways to get data from the landing \u2014 one in real-time using a weak carrier signal received by huge ground-based dish antennas, and another data relay route through the Mars Reconnaissance Orbiter, a NASA satellite flying around the red planet that recorded telemetry from the lander for later playback to Earth.<\/p>\n

The MarCO CubeSat came through Monday, giving officials detailed information about InSight\u2019s status as it maneuvered through the Martian atmosphere.<\/p>\n

\u201cGround stations are observing signals consistent with parachute deploy,\u201d said Christine Szalai, an entry, descent and landing systems engineer at JPL. \u201cTelemetry shows parachute deployment, radar powered on. Heat shield separation commanded.\u201d<\/p>\n

Rob Manning, JPL\u2019s chief engineer, provided color commentary on NASA TV\u2019s broadcast of InSight\u2019s landing.<\/p>\n

\u201cThis is really good news so far,\u201d said Manning, a Mars mission architect who has helped lead entry, descent and landing  teams since the 1990s. \u201cI\u2019m on pins and needles.\u201d<\/p>\n

\u201cWe have radar activation where radar is beginning to search for the ground,\u201d Szalai said as InSight remained suspended under a 39-foot (11.8-meter) diameter parachute. \u201cOnce the radar locks on the ground and InSight is about one kilometer above the surface the lander will separate from the backshell and begin terminal descent using its 12 descent engines.<\/p>\n

\u201cAltitude convergence, the radar has locked on the ground!\u201d she continued moments later, prompting applause in the JPL control room. \u201cStanding by for lander separation\u2026 lander separation commanded. Altitude 600 meters\u2026 gravity turn, altitude 400 meters\u2026 300 meters.. 200 meters\u2026 80 meters\u2026 60 meters\u2026 50 meters, constant velocity, 37 meters\u2026 30 meters\u2026 20 meters\u2026 17 meters, standing by for touchdown\u2026<\/p>\n

\u201cTouchdown confirmed! InSight is on the surface of Mars!\u201d<\/p>\n

\"\"
Artist\u2019s illustration of InSight firing its 12 retrorockets. Credit: NASA<\/figcaption><\/figure>\n

Monday\u2019s landing concluded a 301-million-mile (484-million-kilometer) journey for InSight that began May 5 with a predawn fog-enshrouded blastoff aboard a United Launch Alliance Atlas 5 rocket from Vandenberg Air Force Base in California. InSight was the first Mars mission to leave Earth from the West Coast, supplanting Cape Canaveral, the typical departure point for interplanetary probes.<\/p>\n

Within a few minutes of landing, InSight radioed its first image from Elysium Planitia, showing a flat, mostly featureless landing site, with sandy soils and a modestly-sized rock near one of the lander\u2019s footpads. Protective lens covers on both of the probe\u2019s cameras will be released late this week, allowing InSight to gain a clearer view of its environment.<\/p>\n

\u201cToday, we successfully landed on Mars for the eighth time in human history,\u201d said NASA Administrator Jim Bridenstine. \u201cInSight will study the interior of Mars, and will teach us valuable science as we prepare to send astronauts to the Moon and later to Mars. This accomplishment represents the ingenuity of America and our international partners and it serves as a testament to the dedication and perseverance of our team. The best of NASA is yet to come, and it is coming soon.\u201d<\/p>\n

InSight\u2019s arrival on the red planet Monday was the first successful Mars landing in six years. The stationary robot joins NASA\u2019s Curiosity rover already on Mars, exploring Gale Crater roughly 340 miles (550 kilometers) from InSight\u2019s landing zone.<\/p>\n

NASA officials were elated with the landing in a press briefing Monday afternoon. More than half of all Mars landing attempts have ended in failure.<\/p>\n

\u201cListening to Christine (Szalai) call out as we got closer and closer to the surface, every time she made a call out, the hairs on the back of my neck would start rising a little bit higher \u2026When we finally got the confirmation of touchdown, it was completely amazing,\u201d said Tom Hoffman, InSight\u2019s project manager at JPL. \u201cThe whole room went crazy \u2026 My inner four-year-old came out.\u201d<\/p>\n

At first glance, InSight\u2019s surroundings appear to match predictions based on imagery from orbiting satellites. Mission managers wanted to send InSight to Elysium Planitia because it was a safe landing site, and offered smooth terrain for the lander\u2019s robotic arm to place a pair of European-built science instruments on the surface.<\/p>\n

\u201cThere certainly are some small rocks, but those look pretty manageable,\u201d Hoffman told reporters after Monday\u2019s landing.<\/p>\n

Bruce Banerdt, InSight principal investigator at JPL, said the lander arrived on flat terrain, with a tilt of just 2 degrees.<\/p>\n

\"\"
A camera on InSight\u2019s robotic arm captured this view after Monday\u2019s landing on Mars. Credit: NASA\/JPL-Caltech<\/figcaption><\/figure>\n

Monday\u2019s landing is just the beginning of a months-long process to survey InSight\u2019s landing site and deploy the mission\u2019s two science payloads.<\/p>\n

\u201cWe were all certain that that first image would help us determine how difficult of a job we would have in placing the instruments, and I\u2019m very happy that it looks like we\u2019ll be able to do it quite easily, we hope,\u201d said Elizabeth Barrett, InSight instrument operations lead at JPL.<\/p>\n

A fresh data downlink from InSight through the Mars Odyssey orbiter Monday night confirmed the solar arrays on the lander opened and were collecting sunlight, a crucial step in ensuring the craft\u2019s long-term survival. Post-landing checkouts of InSight\u2019s robotic arm and instruments are planned starting Tuesday.<\/p>\n

InSight\u2019s nearly 8-foot-long (2.4-meter) robotic arm will place a French-built seismometer and German-made heat probe on the Martian surface next to the lander in the next few months.<\/p>\n

The contributions from CNES \u2014 the French space agency \u2014 and the German Aerospace Center \u2014 or DLR \u2014 totaled around $180 million. NASA\u2019s expenditures on the InSight mission come to $813 million, including a $163 million launch contract with United Launch Alliance.<\/p>\n

The InSight mission\u2019s robotic arm was originally built for the canceled Mars Surveyor lander that was supposed to launch in 2001. Other leftover parts on InSight include a landing radar originally built as a spare for the Phoenix mission, and surplus structural booms from the Curiosity rover repurposed for a Spanish-built weather station on InSight to collect temperature and wind data.<\/p>\n

InSight will first put the seismometer package on the surface near the lander, then the arm will retrieve a wind and thermal shield to cover the instrument. The heat probe will be deployed last for its mechanized mole to start digging into the Martian crust.<\/p>\n

\u201cI liken it to \u2026 playing that \u201cClaw\u201d game at a carnival, but you\u2019re doing it with a really, really valuable prize, and you\u2019re doing it blindfolded, where you can only take occasional pictures, and then you\u2019re doing it via remote control on another planet,\u201d Barrett said of the carefully-choreographed procedure to deploy InSight\u2019s two science instruments. \u201cIt takes a little bit longer. You need take more pauses to make sure you actually have the grapple of the payload before you lift it up, and it\u2019s actually on the ground before you let it go.\u201d<\/p>\n

\u201cThis entire process, just getting the instruments to the ground, takes approximately two-to-three months, so it\u2019s going to take a little bit of time to get to that point,\u201d Barrett said. \u201cAnd then another couple of months for the mole to penetrate into the ground and to do the fine-tuning of the seismometer, and at that point, we\u2019ll be sitting back and listening for those marsquakes and measuring the vital signs of Mars, getting all that great science return. We\u2019re really looking forward to that.\u201d<\/p>\n

Both instruments will transmit data through electric tethers leading to the lander.<\/p>\n

\"\"
Artist\u2019s illustration of the InSight spacecraft on Mars, with the seismometer and heat probe deployed. Credit: NASA\/JPL-Caltech<\/figcaption><\/figure>\n

\u201cSensitive is really an understatement,\u201d Banerdt said of the seismometer. \u201cIt\u2019s an exquisitely sensitive device for measuring the motion of the ground. And when we talk about motion, we\u2019re talking about vibrations that have an amplitude comparable to the size of an atom.<\/p>\n

\u201cThese are waves that were generated, maybe, by a marsquake on the other side of the planet, have traveled all the way through the planet, getting their waveform modified as they go through the planet and picking up information about the deep interior structure, and then we are able to pick it up when it comes back up to the surface under the seismometer,\u201d Banerdt said.<\/p>\n

The seismic sensors aboard InSight evolved from mission concepts in the 1990s and 2000s that would have dispatched multiple small probes to Mars, creating a global geophysical network. InSight will give scientists just one seismic station, but experts have developed techniques to glean information about the interior of Mars, even with a single seismometer.<\/p>\n

Researchers have attempted seismic detections on Mars before, but seismometers on NASA\u2019s Viking landers in the 1970s provided inconclusive results. The instruments were mounted the decks of the landers, making them susceptible from interference from spacecraft vibrations and winds.<\/p>\n

\u201cNot only do you have to have a very sensitive device for measuring those motions but you have to protect it from everything else that might affect it,\u201d he said. \u201cWe have several different layers of protection, it\u2019s sort of like a Russian doll.\u201d<\/p>\n

Philippe Lognonn\u00e9, head of the InSight seismic investigation team at the Institut de Physique du Globe de Paris in France, said scientists do not have a confirmed detection of marsquake, but evidence suggests weak tremors occur on the red planet.<\/p>\n

\u201cWe have no clear data on seismic activity on the planet,\u201d Lognonn\u00e9 in an interview with Spaceflight Now before InSight\u2019s launch. \u201cWe imagine it because we see faults on the surface. In some places, we have seen where a boulder may have fallen down from a scarp. But again, we have no data.\u201d<\/p>\n

Lognonn\u00e9 said, based on existing theoretical models, the seismometer could register around 20 or 30 quakes per year, sensing ripples from all types of seismic waves moving through the planet.<\/p>\n

\u201cWe cover all the seismic waves, and we even have sensitivity to tides, the Phobos (Mars\u2019s biggest moon) tide especially,\u201d Lognonn\u00e9 said. \u201cWe cover all the signals to be generated by a quake.\u201d<\/p>\n

\"\"
Artist\u2019s rendition of the interior structure of Mars. Credit: NASA\/JPL-Caltech<\/figcaption><\/figure>\n

Once placed on the surface of Mars, the Heat Flow and Physical Properties Package, know as HP3, will hammer to a depth of 16 feet, or 5 meters, a process expected to take around six weeks with roughly 10,000 individual hammer blows, accounting for several planned pauses to allow the instrument to record thermal conductivity measurements.<\/p>\n

\u201cIf you have an astronaut on the planet, you can do this in maybe 20 minutes or half an hour,\u201d Banerdt said of the heat flow experiment. \u201cBut if you want to do it robotically, you have to get a little bit more clever.\u201d<\/p>\n

The metallic mole will probe deeper into the Martian crust than any past lander.<\/p>\n

\u201cWe think this remote probe can actually go down about 15 feet, which gives us a better baseline to measure the temperature increase with depth and be able to estimate the amount of heat coming out of Mars,\u201d Banerdt said.<\/p>\n

\u201cAnd that amount of heat is tied to the geological activity of the planet. It\u2019s the heat engine of the planet that drives volcanism, it drives tectonic activity, it drives mountain-building. So all the geological processes that happen on a planet are driven by its heat engine, and we want to measure sort of the vigor of that heat engine.\u201d<\/p>\n

\u201cWe switch on the temp sensors and record the temperature over depth and time for up to two years,\u201d said Tilman Spohn, HP3 investigation lead from DLR, the German Aerospace Center, in Berlin. \u201cTaking the temperature gradient, or the rate at which the temperature increases (with depth), gives us the heat flow. Very simple and straightforward, but as planetary science often is, very difficult. The devil is in the details.\u201d<\/p>\n

Scientists will also measure Mars\u2019 polar wobble by analyzing radio signals transmitted between InSight and Earth-based antennas.<\/p>\n

\u201cBy the timing of that signal, we can track the location of the spacecraft at Mars \u2026 with an accuracy of something around a foot or so, maybe a little bit less,\u201d Banerdt said. \u201cTo me, that\u2019s the closest we can get to magic with science.\u201d<\/p>\n

With that information, scientists can determine which way the Martian north pole is pointing as the planet rotates.<\/p>\n

\u201cOver the course of a year, we can watch the north pole wobble just a little bit because of the core sloshing around inside of the planet, and that will give us a very, very tight constraint on the size of that core and its density, and so its composition,\u201d Banerdt said. \u201cThat tells us the structure of Mars. The structure of Mars tells us something about the processes that put that structure together. We can put this into our mdoels, extrapolate it to Earth, and understand how the Earth formed four-and-half billion years ago.\u201d<\/p>\n

Much of the ancient geologic record on Earth has eroded away, but Mars may still hold clues about how it was born, accreted rock and dust, and formed a hot, high-pressure mantle and core as heavier elements sunk deep beneath its surface.<\/p>\n

\u201cHow we get from a ball of featureless rock into a planet that may or may not support life is a key question in planetary science,\u201d Banerdt said. \u201cAnd these processes that do this all happen in the first tens of millions of years.\u201d<\/p>\n

Discoveries made by InSight at Mars could inform scientists how the Earth formed and evolved.<\/p>\n

\u201cMars is a smaller planet,\u201d Banerdt said. \u201cIt\u2019s less active than the Earth, so it has retained the fingerprints of those early processes in its basic structure \u2014 the thickness of the crust, the compositon of the mantle, the size and composition of its core,\u201d he said. \u201cBy mapping out these boundaries, these various different sections of the inside of the planet, we can then understand better how the planet formed, and how our planet got to be the way it is.\u201d<\/p>\n

InSight was originally supposed to launch in March 2016, and reach Mars later that year, but problems sealing a vacuum enclosure containing the French seismic sensors forced officials to postpone the mission. Mars launch opportunities come once every 26 months, when the planets are in the proper positions in the solar system, so the next chance to send InSight came this year.<\/p>\n

Engineers redesigned the vacuum enclosure to eliminate an air leak in a feed-through, or wiring interface, used to route data between the seismic sensors inside the instrument and electronics and communications equipment aboard the InSight spacecraft. The fix passed testing, and officials cleared the probe for launch.<\/p>\n

NASA\u2019s next Mars mission, the Mars 2020 rover, is scheduled for liftoff from Cape Canaveral atop an Atlas 5 rocket in July 2020, and should reach the red planet Feb. 18, 2021.<\/p>\n

Email the author.<\/i><\/b><\/p>\n

Follow Stephen Clark on Twitter: @StephenClark1.<\/strong><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

InSight project manager Tom Hoffman motions to an image captured by the spacecraft minutes after landing on Mars. Credit: NASA\/Bill Ingalls NASA\u2019s InSight spacecraft plunged into the rarefied atmosphere of Mars at a speed of more than 12,000 mph Monday and braked to a gentle touchdown, setting the stage for a two-year surface mission to […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[690,1913,1914,242,455,927,1183,472],"class_list":["post-13487","post","type-post","status-publish","format-standard","hentry","category-news","tag-cnes","tag-discovery-program","tag-dlr","tag-france","tag-germany","tag-insight","tag-jet-propulsion-laboratory","tag-lockheed-martin"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/13487"}],"collection":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/comments?post=13487"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/13487\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=13487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=13487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=13487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}