Mariner program in the context of Mariner 9

Valles Marineris (/ˈvælɪs mærɪˈnɛərɪs/; Latin for Mariner Valleys, named after the Mariner 9 Mars orbiter of 1971–72 which discovered it) is a system of canyons that runs along the Martian surface east of the Tharsis region. At more than 4,000 km (2,500 mi) long, 200 km (120 mi) wide and up to 7 km (23,000 ft) deep, Valles Marineris is the largest canyon in the Solar System.

Valles Marineris is located along the equator of Mars, on the east side of the Tharsis Bulge, and stretches for nearly a quarter of the planet's circumference. The canyon system starts in the west with Noctis Labyrinthus; proceeding to the east are Tithonium and Ius chasmata, then Melas, Candor and Ophir chasmata, then Coprates Chasma, then Ganges, Capri and Eos chasmata; finally it empties into an outflow channel region containing chaotic terrain that ends in the basin of Chryse Planitia.

Mariner 10 was an American robotic space probe launched by NASA on 3 November 1973, to fly by the planets Mercury and Venus. It was the first spacecraft to visit Mercury and the first to perform a flyby of multiple planets.

Mariner 10 was launched approximately two years after Mariner 9 and was the last spacecraft in the Mariner program. (Mariner 11 and Mariner 12 were allocated to the Voyager program and redesignated Voyager 1 and Voyager 2.)

Mariner 2 (Mariner-Venus 1962), an American space probe to Venus, was the first robotic space probe to report successfully from a planetary encounter. The first successful spacecraft in the NASA Mariner program, it was a simplified version of the Block I spacecraft of the Ranger program and an exact copy of Mariner 1. The missions of the Mariner 1 and 2 spacecraft are sometimes known as the Mariner R missions. Original plans called for the probes to be launched on the Atlas-Centaur, but serious developmental problems with that vehicle forced a switch to the much smaller Agena B second stage. As such, the design of the Mariner R vehicles was greatly simplified. Far less instrumentation was carried than on the Soviet Venera probes of this period—for example, forgoing a TV camera—as the Atlas-Agena B had only half as much lift capacity as the Soviet 8K78 booster. The Mariner 2 spacecraft was launched from Cape Canaveral on August 27, 1962, and passed as close as 34,773 km (21,607 mi) to Venus on December 14, 1962.

The Mariner probe consisted of a 100 cm (39 in) diameter hexagonal bus, to which solar panels, instrument booms, and antennas were attached. The scientific instruments on board the Mariner spacecraft were: two radiometers (one each for the microwave and infrared portions of the spectrum), a micrometeorite sensor, a solar plasma sensor, a charged particle sensor, and a magnetometer. These instruments were designed to measure the temperature distribution on the surface of Venus and to make basic measurements of Venus's atmosphere.

Launch Complex 36 (LC-36) is a launch complex located at the Cape Canaveral Space Force Station in Florida. Located south of the Missile Row launch range, the complex originally consisted of two pads—designated LC-36A and LC-36B—to support the flights of Atlas launch vehicles equipped with a Centaur upper stage. From the 1960s to the 1980s, LC-36 was used by NASA and the United States Air Force to launch many payloads from the Atlas-Centaur and its derivatives, including the Pioneer, Surveyor, and Mariner probes. During the late 1980s, LC-36B was also used to launch the Atlas G, and General Dynamics (and later Lockheed Martin) modified the two pads to support the larger Atlas I, Atlas II, and Atlas III throughout the 1990s and early 2000s.

Following the Atlas program's relocation to Space Launch Complex 41 (SLC-41) in 2005, LC-36 stood vacant until Blue Origin acquired the lease in 2015 for use by their heavy-lift New Glenn rocket. The company made extensive modifications to the complex during this time, including demolishing 36A and 36B to build one large pad in place, as well as integrating the neighboring Launch Complex 11 (LC-11) into the facility. Following this large-scale renovation, the new era of LC-36 commenced with the maiden flight of New Glenn in January 2025.