International Journal of Mars Research | ISSN 2453-8760 | Current Issue: 12 Volume 4

Mars Odyssey

Mars Odyssey

Mars Odyssey

2001 Mars Odyssey is a robotic spacecraft orbiting theplanet Mars. Its mission is to use spectrometers and electronic

imagers to detect evidence of past or present water and volcanic activity on Mars. It is hoped that the data Odyssey obtains will help answer the question of whether life has ever existed on Mars. It also acts as a relay for communications between the Mars Exploration Rovers, Mars Science Laboratory, and the Phoenix lander to Earth.

Operator: NASA, Jet Propulsion Laboratory

Odyssey was launched April 7, 2001 on a Delta II rocket from Cape Canaveral Air Force Station, and reached Mars orbit on October 24, 2001, at 2:30 a.m. UTC (October 23, 7:30 p.m. PDT, 10:30 p.m. EDT). The spacecraft’s main engine fired in order to brake the spacecraft’s speed, which allowed it to be captured into orbit around Mars. Odyssey used a technique called “aerobraking” that gradually brought the spacecraft closer to Mars with each orbit. By using the atmosphere of Mars to slow down the spacecraft in its orbit, rather than firing its engine or thrusters, Odyssey was able to save more than 200 kilograms (440 lb) of propellant. Aerobraking ended in January, and Odyssey began its science mapping mission on February 19, 2002. It is currently in a polar orbit around Mars with an altitude of about 3,800 km or 2,400 miles.

Mars Odyssey - description of on-board instruments

Mars Odyssey – description of on-board instruments. Image Credit: NASA

Scientific instruments:

  • Thermal Emission Imaging System (THEMIS)
  • Gamma Ray Spectrometer (GRS), includes the High Energy Neutron Detector (HEND), provided by Russia
  • Mars Radiation Environment Experiment (MARIE)

We recommend: Mars Odyssey – Detailed poster with on-board instruments

Useful external resources for study:

sources: NASA, JPL, Wikipedia

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