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"extract": "The Viking program consisted of a pair of identical American space probes, Viking 1 and Viking 2 both launched in 1975, and landed on Mars in 1976. The mission effort began in 1968 and was managed by the NASA Langley Research Center. Each spacecraft was composed of two main parts: an orbiter spacecraft which photographed the surface of Mars from orbit, and a lander which studied the planet from the surface. The orbiters also served as communication relays for the landers once they touched down.",
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"extract": "The Viking program consisted of a pair of identical American space probes, Viking 1 and Viking 2 both launched in 1975, and landed on Mars in 1976. The mission effort began in 1968 and was managed by the NASA Langley Research Center. Each spacecraft was composed of two main parts: an orbiter spacecraft which photographed the surface of Mars from orbit, and a lander which studied the planet from the surface. The orbiters also served as communication relays for the landers once they touched down.",
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"description": "Space orbiter and lander sent to Mars",
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"extract": "The Viking 2 mission was part of the American Viking program to Mars, and consisted of an orbiter and a lander essentially identical to that of the Viking 1 mission. Viking 2 was operational on Mars for 1281 sols. The Viking 2 lander operated on the surface for 1,316 days, or 1281 sols, and was turned off on April 12, 1980, when its batteries eventually failed. The orbiter worked until July 25, 1978, returning almost 16,000 images in 706 orbits around Mars.",
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"description": "Impact basin on Mars",
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"displaytitle": "\u003cspan lang=\"en\" dir=\"ltr\"\u003e\u003cspan class=\"mw-page-title-main\"\u003eUtopia Planitia\u003c/span\u003e\u003c/span\u003e",
"extract": "Utopia Planitia is a large plain within Utopia, the largest recognized impact basin on Mars and in the Solar System with an estimated diameter of 3,300\u00a0km (2,100\u00a0mi). It is the Martian region where the Viking 2 lander touched down and began exploring on September 3, 1976, and the Zhurong rover touched down on May 14, 2021, as a part of the Tianwen-1 mission. It is located at the antipode of Argyre Planitia, centered at 46.7\u00b0N 117.5\u00b0E. It is also in the Casius quadrangle, Amenthes quadrangle, and the Cebrenia quadrangle of Mars. The region is in the broader North Polar/Borealis Basin that covers most of the Northern Hemisphere of Mars.",
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"timestamp": "2026-05-30T12:43:19Z",
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"description": "Fourth planet from the Sun",
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"extract": "Mars is the fourth planet from the Sun. It is also known as the \"Red Planet\", for its orange-red appearance. Mars is a desert-like rocky planet with a tenuous atmosphere that is primarily carbon dioxide. At the average surface level the atmospheric pressure is a few thousandths of Earth\u0027s, atmospheric temperature ranges from \u2212153 to 20\u00a0\u00b0C, and cosmic radiation is high. Mars retains some water, in the ground as well as thinly in the atmosphere, forming cirrus clouds, fog, frost, larger polar regions of permafrost and ice caps, but no bodies of liquid surface water. Its surface gravity is roughly a third of Earth\u0027s or double that of the Moon. Its diameter, 6,779\u00a0km (4,212\u00a0mi), is about half the Earth\u0027s, or twice the Moon\u0027s, and its surface area is the size of all the dry land of Earth.",
"extract_html": "\u003cp\u003e\u003cb\u003eMars\u003c/b\u003e is the fourth planet from the Sun. It is also known as the \"\u003cb\u003eRed Planet\u003c/b\u003e\", for its orange-red appearance. Mars is a desert-like rocky planet with a tenuous atmosphere that is primarily carbon dioxide. At the average surface level the atmospheric pressure is a few thousandths of Earth\u0027s, atmospheric temperature ranges from \u2212153 to 20\u00a0\u00b0C, and cosmic radiation is high. Mars retains some water, in the ground as well as thinly in the atmosphere, forming cirrus clouds, fog, frost, larger polar regions of permafrost and ice caps, but no bodies of liquid surface water. Its surface gravity is roughly a third of Earth\u0027s or double that of the Moon. Its diameter, 6,779\u00a0km (4,212\u00a0mi), is about half the Earth\u0027s, or twice the Moon\u0027s, and its surface area is the size of all the dry land of Earth.\u003c/p\u003e",
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"text": "Viking program: The American Viking 2 spacecraft lands at Utopia Planitia on Mars.",
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"text": "Viking program: The American Viking 2 spacecraft lands at Utopia Planitia on Mars.",
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