Viking 2

Viking 2
NASA · Public domain · source
Mission name	Viking 2
Operator	NASA
Spacecraft	Viking (spacecraft)
Launch vehicle	Titan IIIE
Launch site	Cape Canaveral Air Force Station
Launch date	September 9, 1975
Landing date	September 3, 1976

Viking 2 was a NASA mission that was part of the Viking program, a series of space exploration missions that aimed to study the planet Mars and search for signs of life on Mars. The mission was designed to follow up on the success of the Mariner 4 and Mariner 9 missions, which had provided the first close-up images of Mars. The Viking 2 spacecraft was launched on September 9, 1975, from Cape Canaveral Air Force Station aboard a Titan IIIE rocket, and it arrived at Mars on August 7, 1976, entering into orbit around the planet. The mission was a collaboration between NASA, Jet Propulsion Laboratory, and Martin Marietta, with significant contributions from European Space Agency and Soviet Academy of Sciences.

Introduction

The Viking 2 mission was designed to build on the knowledge gained from previous Mars missions, including Mariner 4 and Mariner 9, which had provided the first close-up images of the planet. The mission was also influenced by the work of Carl Sagan, who had advocated for the search for life on Mars. The Viking 2 spacecraft was equipped with a range of instruments, including a lander, an orbiter, and a biological experiment package, which were designed to search for signs of life on Mars and study the planet's geology and atmosphere. The mission was also supported by NASA's Ames Research Center, Langley Research Center, and Goddard Space Flight Center, as well as the University of California, Berkeley and the Massachusetts Institute of Technology.

Spacecraft Design

The Viking 2 spacecraft was designed and built by Martin Marietta, with significant contributions from NASA's Jet Propulsion Laboratory and Goddard Space Flight Center. The spacecraft consisted of an orbiter and a lander, which were designed to work together to study the planet Mars and search for signs of life on Mars. The orbiter was equipped with a range of instruments, including a television camera, an infrared radiometer, and a magnetometer, which were designed to study the planet's geology and atmosphere. The lander was equipped with a biological experiment package, which included a gas chromatograph and a mass spectrometer, designed to search for signs of life on Mars. The spacecraft was also supported by NASA's Deep Space Network, which provided critical communication and navigation support throughout the mission.

Mission Overview

The Viking 2 mission was designed to study the planet Mars and search for signs of life on Mars. The mission consisted of two main components: an orbiter and a lander. The orbiter was designed to study the planet's geology and atmosphere, while the lander was designed to search for signs of life on Mars. The mission was also designed to follow up on the success of the Mariner 4 and Mariner 9 missions, which had provided the first close-up images of Mars. The Viking 2 mission was supported by NASA's Mariner Mark II program, which was a series of space exploration missions designed to study the outer planets and their moons. The mission was also influenced by the work of Soviet space program, which had launched a series of Luna program missions to study the Moon.

Launch and Orbit

The Viking 2 spacecraft was launched on September 9, 1975, from Cape Canaveral Air Force Station aboard a Titan IIIE rocket. The spacecraft entered into Earth orbit and then departed for Mars, using a gravity assist from Earth to gain speed and trajectory. The spacecraft arrived at Mars on August 7, 1976, and entered into orbit around the planet. The orbiter began to study the planet's geology and atmosphere, while the lander prepared to descend to the planet's surface. The mission was supported by NASA's Tracking and Data Relay Satellite System, which provided critical communication and navigation support throughout the mission.

Landing and Surface Operations

The Viking 2 lander touched down on the surface of Mars on September 3, 1976, in the Utopia Planitia region. The lander was equipped with a range of instruments, including a biological experiment package, which included a gas chromatograph and a mass spectrometer, designed to search for signs of life on Mars. The lander also included a seismometer, which was designed to study the planet's seismic activity. The lander operated for 1281 sols (1296 Earth days), providing a wealth of data about the planet's geology and atmosphere. The mission was supported by NASA's Goldstone Deep Space Communications Complex and Madrid Deep Space Communication Complex, which provided critical communication and navigation support throughout the mission.

Results and Legacy

The Viking 2 mission provided a wealth of data about the planet Mars and its potential for life on Mars. The mission showed that Mars is a barren and hostile environment, with a thin atmosphere and extreme temperatures. However, the mission also showed that Mars may have had a watery past, with evidence of rivers, lakes, and oceans. The mission's findings have been influential in shaping our understanding of Mars and its potential for life on Mars, and have paved the way for future Mars exploration missions, including NASA's Mars Science Laboratory and European Space Agency's ExoMars program. The mission's legacy continues to be felt, with ongoing research and exploration of Mars by NASA, European Space Agency, and other space agencies, including Roscosmos and China National Space Administration.