Lunar Magnetotelluric Sounder (IMAGE) Southwest Research Institute Caption SwRI developed and delivered the LMS instrument for the Mare Crisium lander to determine the electrical conductivity of the interior of the Moon by measuring low-frequency electric and magnetic fields. LMS includes (from left) a magnetometer (white) on an extendable mast, a central electronics box and four spring-launched electrodes. Credit Southwest Research Institute Usage Restrictions Images/Videos may be used by the public for educational and informational purposes only. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.