In a statement issued yesterday (December 22, 2015) NASA announced that it has called off the planned March 2016 launch of the InSight mission to Mars. The decision follows unsuccessful attempts to repair a leak in a section of the prime instrument in the science payload.
The unmanned InSight (Interior Exploration using Seismic Investigations Geodesy and Heat Transport) lander is designed to study the deep interior of Mars to increase understanding of how all rocky planets, including Earth, formed and evolved.
The relative positions of the planets are most favorable for launching missions from Earth to Mars for only a few weeks every 26 months. For InSight, that 2016 launch window existed from March 4 to March 30.
John Grunsfeld is associate administrator for NASA’s Science Mission Directorate in Washington. Grusdfeld said:
We push the boundaries of space technology with our missions to enable science, but space exploration is unforgiving, and the bottom line is that we’re not ready to launch in the 2016 window. A decision on a path forward will be made in the coming months, but one thing is clear: NASA remains fully committed to the scientific discovery and exploration of Mars.
The instrument involved is a seismometer designed to measure ground movements as small as the diameter of an atom. The instrument requires a vacuum seal around its three main sensors to withstand the harsh conditions of the Martian environment.
A leak that previously had prevented the seismometer from retaining vacuum conditions was repaired, and the mission team was hopeful the most recent fix also would be successful. However, during testing on Monday in extreme cold temperature (-49 degrees Fahrenheit/-45 degrees Celsius) the instrument again failed to hold a vacuum.
NASA officials determined there is insufficient time to resolve another leak, and complete the work and thorough testing required to ensure a successful mission.
Jim Green is director of NASA’sPlanetary Science Division in Washington. Green said:
In 2008, we made a difficult, but correct decision to postpone the launch of the Mars Science Laboratory mission for two years to better ensure mission success,” said “The successes of that mission’s rover, Curiosity, have vastly outweighed any disappointment about that delay.
The spacecraft was delivered to Vandenberg Air Force Base in California, on December 16, 2015. With the 2016 launch canceled, the spacecraft will be returned from Vandenberg to Lockheed’s facility in Denver.
Bottom line: On December 22, 2015 NASA announced that it has called off the planned March 2016 launch of the InSight mission to Mars. The decision follows unsuccessful attempts to repair a leak in a section of the prime instrument in the science payload.
Eleanor Imster has helped write and edit EarthSky since 1995. She was an integral part of the award-winning EarthSky radio series almost since it began until it ended in 2013. Today, as Lead Editor at EarthSky.org, she helps present the science and nature stories and photos you enjoy. She also serves as one of the voices of EarthSky on social media platforms including Facebook, Twitter and G+. She and her husband live in Tennessee and have two grown sons.