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 22 May 2018. The cruise stage that carries the lander includes solar panels, antenna, star trackers, sun sensor, inertial measurement unit among its technologies. The thrusters are actually on the InSight lander itself, but there are cutouts in the shell so the relevant rockets can vent into space. The final course correction was 25 November 2018, the day before its touch down. A few hours before making contact with the Martian atmosphere, the cruise stage was jettisoned, on 26 November 2018. Entry, descent, and landing 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 at Elysium Planitia. After landing, the mission took three months to deploy and commission the geophysical science instruments. It then began its mission of observing Mars, which is planned to last for two years. The spacecraft's mass that entered the atmosphere of Mars was . There were three major stages to InSight's landing: 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: at 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: 25 November 2018, final course correction before EDL. 26 November 2018, Cruise stage jettisoned before entering the atmosphere. Several minutes later, the aeroshell containing the lander makes contact with the upper Martian atmosphere at . At this point it is above Mars and in the next few minutes it lands, but undergoes many stages. Aeroshell is heated to during descent. At and ~ 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 a speed of about and at altitude. Landing rockets turned on. Roughly from the ground constant velocity mode is entered. Approaches ground at about . Touchdowneach of the three lander legs