Illustration of NASA’s Internal Survey Using Seismic Surveying, Geodesy, and Heat Transport (InSight) Credit: NASA
Dusty solar panels and darker skies are expected to end the Martian lander’s mission around the end of this year.
NASA’s InSight Mars lander is gradually losing power and is likely to cease scientific operations later this summer. The InSight team expects the lander to become inoperable by December, completing a mission that has so far detected more than 1,300 earthquakes – the last, magnitude 5, on May 4, 2022 – and locate earthquake-prone regions on the Red Planet.
The information gathered from these tremors allowed scientists to measure the depth and composition of the crust, mantle and core of Mars. In addition, InSight (short for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport) recorded important meteorological data and studied remnants of the ancient magnetic field on Mars.
The NASA InSight Mars team talks about mission science and the innovative ways in which they have taken on engineering challenges. During his stay on Mars, InSight achieved all its major scientific goals and continued to search for earthquakes. Its mission is expected to end around the end of 2022. Credit: NASA / JPL-Caltech
“InSight is transforming our understanding of the interior of rocky planets and laying the groundwork for future missions,” said Lori Glaze, director of NASA’s Planetary Science Division. “We can apply what we have learned about the internal structure of Mars to the Earth, the Moon, Venus and even rocky planets in other solar systems.
InSight landed on Mars on November 26, 2018. Equipped with a pair of solar panels, each about 7 feet (2.2 meters) wide, it is designed to fulfill the main scientific objectives of the mission in its first year on Mars. earth years). Having achieved them, the spacecraft is now on an expanded mission and its solar panels produce less energy as they continue to accumulate dust.
InSight captured this image on one of its dust-covered solar panels on April 24, 2022, the 1211th Martian day or salt from the mission. Credit: NASA / JPL-Caltech
Due to the reduced power, the team will soon put the robotic arm of the lander at rest (called the “retirement position”) for the last time later this month. Originally designed to deploy the device’s seismometer and heat probe, the hand played an unexpected role in the mission: along with using it to bury the heat probe after sticky Martian soil challenged the probe, the team used the hand in an innovative way to remove dust from solar panels. As a result, the seismometer was able to work more often than it would otherwise, which led to new discoveries.
When InSight landed, the solar panels produced about 5,000 watts each Martian day or salt – enough to power an electric oven for an hour and 40 minutes. They now produce approximately 500 watts of sol – enough to power the same electric oven in just 10 minutes.
This is an illustration showing a simulated view of NASA’s InSight, which is about to land on the surface of Mars. This view shows the top of the spacecraft. Credit: NASA / JPL-Caltech
In addition, seasonal changes are beginning in Elysium Planitia, the location of InSight on Mars. Over the next few months, there will be more dust in the air, reducing sunlight – and the energy of the launcher. While previous efforts have removed some dust, the mission will need a more powerful dust-cleaning event, such as the “dust devil” (passing whirlwind), to reverse the current trend.
“We look forward to dust removal, as we’ve seen happen several times on Spirit and Opportunity rovers,” said Bruce Bannerd, chief researcher at InSight at NASA’s Southern California Jet Propulsion Laboratory. “It’s still possible, but the energy is low enough that our focus is to make the most of the science we can still gather.”
This artist’s concept shows NASA’s InSight lander with its instruments located on the Martian surface. InSight’s package of weather sensors, called the Auxiliary Payload Subsystem (APSS), includes an air pressure sensor inside the landing gear – its entrance is visible on the InSight deck – and two air temperature and wind sensors on deck. Below the edge of the deck is a magnetometer provided by UCLA to measure changes in the local magnetic field that may also affect SEIS. Credit: NASA / JPL-Caltech
If only 25 percent of InSight’s panels were blown away by the wind, the lander would gain about 1,000 watts of salt – enough to keep collecting science. However, at the current rate of power is declining, InSight’s non-seismic instruments will rarely be included after the end of May.
The energy is prioritized for the seismometer of the device, which will work at certain times of the day, such as at night, when the winds are light and the seismometer is easier to “hear”. The seismometer itself is expected to be switched off by the end of the summer, completing the scientific phase of the mission.
At this point, the lander will still have enough power to operate, taking pictures from time to time and communicating with the Earth. But the team expects that around December the power will be low enough that one day InSight will simply stop responding.
More about the mission
The Jet Propulsion Laboratory (JPL) manages InSight for NASA’s Directorate of Scientific Missions. InSight is part of NASA’s Discovery Program, managed by the Marshall Space Flight Center of the Agency in Huntsville, Alabama. Lockheed Martin Space in Denver built the InSight spacecraft, including its degree of cruise and landing, and supported spacecraft operations for the mission.
A number of European partners, including the French National d’Études Spatiales (CNES) and the German Aerospace Center (DLR), support the InSight mission. CNES has provided NASA’s Seismic Structure for Internal Structure (SEIS) tool, with the principal investigator at the IPGP (Institut de Physique du Globe de Paris). Significant contributions to SEIS came from IPGP; The Max Planck Institute for Solar System Research (MPS) in Germany; The Swiss Federal Institute of Technology (ETH Zurich) in Switzerland; Imperial College London and Oxford University in the United Kingdom; and JPL. DLR provided the Heat Flow Instrument and Physical Properties Package (HP3) with significant contributions from the Center for Space Research (CBK) of the Polish Academy of Sciences and Astronika in Poland. The Spanish Centro de Astrobiologia (CAB) supplied temperature and wind sensors.
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