Mars Science Laboratory
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| Mars Science Laboratory | |
|---|---|
| Name | Mars Science Laboratory |
| Mission type | Mars rover |
| Operator | NASA / JPL |
| COSPAR ID | 2011-070A |
| SATCAT | 37936 |
| Mission duration | Planned: 668 sols (687 Earth days), Elapsed: 2012, 8, 6 sols (2012, 8, 6 days) |
| Spacecraft | Curiosity |
| Manufacturer | JPL, Boeing, Lockheed Martin |
| Launch mass | 3,893 kg (8,583 lb) |
| Dry mass | Rover: 899 kg (1,982 lb) |
| Landing mass | 3,839 kg (8,464 lb) |
| Dimensions | Rover: 2.9 m × 2.7 m × 2.2 m (9.5 ft × 8.9 ft × 7.2 ft) |
| Power | MMRTG |
| Launch date | November 26, 2011, 15:02 UTC |
| Launch rocket | Atlas V 541 (AV-028) |
| Launch site | Cape Canaveral SLC-41 |
| Arrival date | August 6, 2012, 05:17 UTC |
| Location | Gale crater |
| Programme | NASA's Mars Exploration Program |
| Previous mission | Phoenix |
| Next mission | InSight |
Mars Science Laboratory. This ambitious NASA mission successfully delivered the Curiosity rover to the surface of Mars in August 2012. Managed by the Jet Propulsion Laboratory, its primary goal was to assess the past and present habitability of the Gale crater landing site. The mission has vastly exceeded its initial design lifetime, providing a continuous stream of transformative data about the Martian surface.
Overview
The mission represented a quantum leap in Martian robotic exploration, both in scale and technological ambition. It was launched from Cape Canaveral Air Force Station aboard an Atlas V rocket in late 2011. The centerpiece of the project, the Curiosity rover, is a car-sized mobile laboratory far larger than its predecessors, the Spirit and Opportunity rovers. Its revolutionary landing employed the audacious Sky Crane maneuver, a first in the history of planetary exploration. Operations are conducted by a dedicated international team of scientists and engineers, with data relayed through orbiters like the Mars Reconnaissance Orbiter.
Mission objectives
The core scientific objectives were defined by the overarching theme of planetary habitability. A primary goal was to conduct a detailed investigation of the Martian climate and geology, searching for chemical building blocks of life such as organic compounds. The science team aimed to characterize the distribution and cycling of water and carbon dioxide, key elements for biological processes. Furthermore, the mission sought to assess the present surface radiation environment to inform future human expeditions, a directive aligned with the goals of NASA's manned spaceflight programs.
Spacecraft design
The flight system consisted of a cruise stage for interplanetary travel, an aeroshell for atmospheric entry, and the novel Sky Crane descent stage. The cruise stage provided power, propulsion, and communications during the journey from Earth, based on heritage from the Mars Exploration Rover missions. The aeroshell, comprising a heat shield and backshell, protected the rover during its fiery descent through the Martian atmosphere. The Sky Crane then lowered the rover on tethers for a soft touchdown, a system developed to handle the rover's unprecedented mass.
Scientific instruments
The rover carries ten major instruments, forming the most advanced analytical suite ever sent to another planet. The Sample Analysis at Mars (SAM) suite is a sophisticated chemistry lab capable of detecting a wide range of organic compounds. The Chemistry and Camera (ChemCam) instrument uses a laser to vaporize rock samples for spectral analysis. Other key tools include the Alpha Particle X-ray Spectrometer (APXS), the Mars Hand Lens Imager (MAHLI), and the Radiation Assessment Detector (RAD), which provided critical data for planning future missions like Artemis.
Landing site and geology
Gale crater was selected after a rigorous, multi-year evaluation process involving data from the Mars Reconnaissance Orbiter and the Mars Odyssey spacecraft. The site's central feature, Mount Sharp (officially Aeolis Mons), presents a layered geological record spanning billions of years. The rover's traverse from the crater floor up the mountain's slopes has allowed scientists to study a transition from ancient, water-rich clay-bearing strata to younger, drier sulfate-containing layers. This sequence provides a tangible record of major environmental shifts in Martian history.
Mission timeline and discoveries
Following its dramatic landing, the rover began surface operations that have continued for years beyond its primary mission. Key discoveries include definitive evidence for ancient, long-lasting freshwater lakes and streams in Gale crater, confirmed by sediment analysis. The suite of instruments has repeatedly detected organic molecules in drilled rock samples, such as at the "John Klein" and Confidence Hills locations. Measurements of atmospheric methane have shown puzzling seasonal variations, and the RAD instrument's findings have major implications for astronaut safety on future missions to the Moon and Mars.
Category:NASA space probes Category:Missions to Mars Category:2011 in spaceflight Category:Spacecraft launched in 2011