Ο ανιχνευτής Mars Insight της NASA χρησιμοποιεί ένα σεισμόμετρο για να μελετήσει τα εσωτερικά στρώματα του Άρη. Τα σεισμικά σήματα αλλάζουν από τους σεισμούς καθώς περνούν μέσα από διαφορετικούς τύπους υλικού. Οι σεισμολόγοι μπορούν να «διαβάσουν» την ταλάντευση ενός σεισμογράμματος για να μελετήσουν τις ιδιότητες του φλοιού, του μανδύα και του πυρήνα του πλανήτη. Πίστωση: NASA/JPL-Caltech
Η ομάδα της αποστολής InSight επέλεξε να λειτουργεί το σεισμόμετρο για περισσότερο από ό,τι είχε προγραμματιστεί προηγουμένως, αν και η ισχύς προσγείωσης θα εξαντληθεί σύντομα ως αποτέλεσμα.
ως η δύναμη που είναι διαθέσιμη σε[{” attribute=””>NASA’s InSight Mars lander diminishes by the day, the spacecraft’s team has revised the mission’s timeline in order to maximize the science they can conduct. The lander was projected to automatically shut down the seismometer – InSight’s last operational science instrument – by the end of June in order to conserve energy, surviving on what power its dust-laden solar panels can generate until around December.
NASA’s InSight Mars lander took this final selfie on April 24, 2022, the 1,211th Martian day, or sol, of the mission. The lander is covered with far more dust than it was in its first selfie, taken in December 2018, not long after landing – or in its second selfie, composed of images taken in March and April 2019. Credit: NASA/JPL-Caltech
Instead, the team now plans to program the lander so that the seismometer can operate longer, perhaps until the end of August or into early September. Doing so will discharge the lander’s batteries sooner and cause the spacecraft to run out of power at that time as well, but it might enable the seismometer to detect additional marsquakes.
“InSight hasn’t finished teaching us about Mars yet,” said Lori Glaze, director of NASA’s Planetary Science Division in Washington. “We’re going to get every last bit of science we can before the lander concludes operations.”
The InSight team will be available to answer your questions directly on June 28 at 3 p.m. EDT (noon PDT) during a livestream event on YouTube. Questions can be asked using the #AskNASA hashtag.
InSight (short for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport) is in an extended mission after achieving its science goals. The lander has detected more than 1,300 marsquakes since touching down on Mars in 2018, providing information that has allowed scientists to measure the depth and composition of Mars’ crust, mantle, and core. With its other instruments, InSight has recorded invaluable weather data, investigated the soil beneath the lander, and studied remnants of Mars’ ancient magnetic field.
This is NASA InSight’s first full selfie on Mars. It displays the lander’s solar panels and deck. On top of the deck are its science instruments, weather sensor booms, and UHF antenna. The selfie was taken on December 6, 2018 (Sol 10). Credit: NASA/JPL-Caltech
All instruments but the seismometer have already been powered down. Like other Mars spacecraft, InSight has a fault protection system that automatically triggers “safe mode” in threatening situations and shuts down all but its most essential functions, allowing engineers to assess the situation. Low power and temperatures that drift outside predetermined limits can both trigger safe mode.
To enable the seismometer to continue to run for as long as possible, the mission team is turning off InSight’s fault protection system. While this will enable the instrument to operate longer, it leaves the lander unprotected from sudden, unexpected events that ground controllers wouldn’t have time to respond to.
This is NASA InSight’s second full selfie on Mars. Since taking its first selfie, the lander has removed its heat probe and seismometer from its deck, placing them on the Martian surface; a thin coating of dust now covers the spacecraft as well. This selfie is a mosaic made up of 14 images taken on March 15 and April 11 – the 106th and 133rd Martian days, or sols, of the mission – by InSight’s Instrument Deployment Camera, located on its robotic arm. Credit: NASA/JPL-Caltech
“The goal is to get scientific data all the way to the point where InSight can’t operate at all, rather than conserve energy and operate the lander with no science benefit,” said Chuck Scott, InSight’s project manager at NASA’s Jet Propulsion Laboratory in Southern California.
Regular updates on InSight’s power and observations from mission team members will appear on blogs.nasa.gov/insight.
The InSight team will also be available to answer your questions directly on June 28 at 3 p.m. EDT (noon PDT) during a livestream event on YouTube. Questions can be asked using the #AskNASA hashtag.
More About the Mission
JPL manages InSight for NASA’s Science Mission Directorate. InSight is part of NASA’s Discovery Program, managed by the agency’s Marshall Space Flight Center in Huntsville, Alabama. Lockheed Martin Space in Denver built the InSight spacecraft, including its cruise stage and lander, and supports spacecraft operations for the mission.
A number of European partners, including France’s Centre National d’Études Spatiales (CNES) and the German Aerospace Center (DLR), are supporting the InSight mission. CNES provided the Seismic Experiment for Interior Structure (SEIS) instrument to NASA, with the principal investigator at IPGP (Institut de Physique du Globe de Paris). Significant contributions for 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 and Physical Properties Package (HP3) instrument, with significant contributions from the Space Research Center (CBK) of the Polish Academy of Sciences and Astronika in Poland. Spain’s Centro de Astrobiología (CAB) supplied the temperature and wind sensors.