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Encyclopedia > Mariner 10
The Mariner 10 probe.
The Mariner 10 probe.

Mariner 10 was an unmanned space mission launched on November 3, 1973 to fly by the planets Mercury and Venus. It was launched approximately 2 years after Mariner 9 and was the last spacecraft in the Mariner program (Mariners 11 and 12 were redesignated Voyager 1 and Voyager 2). The Mariner 10 was a probe sent to Mercury. ... The Mariner 10 was a probe sent to Mercury. ... Unmanned space missions are those using remote-controlled spacecraft. ... November 3 is the 307th day of the year (308th in leap years) in the Gregorian Calendar, with 58 days remaining. ... 1973 (MCMLXXIII) was a common year starting on Monday (the link is to a full 1973 calendar). ... Atmospheric characteristics Atmospheric pressure trace Potassium 31. ... Adjective Venusian or (rarely) Cytherean (*min temperature refers to cloud tops only) Atmospheric characteristics Atmospheric pressure 9. ... A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... Mariner 9 launch Mariner 9 was a NASA space probe orbiter that helped in the exploration of Mars and was part of the Mariner program. ... Launch of Mariner 1 (NASA) The Mariner program was a series of unmanned interplanetary probes designed to investigate Mars, Venus and Mercury. ... A NASA artists rendition of a Voyager spacecraft The Voyager 1 spacecraft is an 815-kilogram unmanned probe of the outer solar system and beyond, launched September 5, 1977, and currently operational. ... The Voyager 2 spacecraft was launched in 1977. ...

Contents


Venus flyby

 right Image File history File links Mariner_10_UV_Venus. ...


Mariner 10 was the first spacecraft to make use of a "gravitational slingshot" maneouvre, using Venus to bend its flight path and bring its perihelion down to the level of Mercury's orbit. It used the solar radiation pressure on its solar panels and its high-gain antenna as a means of attitude control during flight. Using a near-ultraviolet filter, it photographed the Venusian chevron clouds and performed other atmospheric studies. It was discovered that extensive cloud detail could be seen via Mariner's ultra-violet camera filters. Venus's cloud cover is nearly featureless in visible light. Earth-based ultra-violet observation did reveal some indistinct blotching even before Mariner 10. But, the detail seen by Mariner was a surprise to most researchers. In orbital mechanics and aerospace engineering, a gravitational slingshot is the use of the motion of a planet to alter the path and speed of an interplanetary spacecraft. ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... Radiation pressure is the pressure exerted upon any surface exposed to electromagnetic radiation. ... Solar Panel (photovoltaic array) US annual average solar energy received by a latitude tilt photovoltaic cell A laundromat in California with solar hot water panels on the roof. ... Ultraviolet (UV) radiation is electromagnetic radiation of a wavelength shorter than that of the visible region, but longer than that of soft X-rays. ... A camera. ... Atmosphere is the general name for a layer of gases that may surround a material body of sufficient mass. ...


Mercury flybys

Mariner 10 flew past Mercury three times in total. Owing to the geometry of its orbit--its orbital period was almost exactly twice Mercury's--the same side of Mercury was sunlit each time, so only half of the planet was mapped by Mariner. It revealed a more or less moon-like surface.


On March 29 and September 21, 1974, and March 16, 1975, Mariner 10 passed by Mercury and, after a mid-course correction on March 16, 1974, was able to map 40-45% of the planet. Its radiometer readings suggested that Mercury has a night time temperature of –183°C (-297°F) and maximum daytime temperatures of 187°C (368°F). This first encounter was at 20:47 UT on March 29, 1974 at a range of 703 kilometres (436.5 miles). March 29 is the 88th day of the year in the Gregorian Calendar (89th in Leap years). ... September 21 is the 264th day of the year (265th in leap years). ... 1974 (MCMLXXIV) was a common year starting on Tuesday (the link is to a full 1974 calendar). ... March 16 is the 75th day of the year in the Gregorian Calendar (76th in Leap years). ... 1975 (MCMLXXV) was a common year starting on Wednesday (the link is to a full 1975 calendar). ... March 16 is the 75th day of the year in the Gregorian Calendar (76th in Leap years). ... 1974 (MCMLXXIV) was a common year starting on Tuesday (the link is to a full 1974 calendar). ... MAP can refer to: Austronesian languages (ISO 639 alpha-3, map) Maghreb Arab Press, the News agency Malawi Against Polio Manifold absolute pressure, an important sensor in automobiles maximum a posteriori estimator, an estimator in statistics Missouri Assessment Program Mobile Application Part, an SS7-based protocol used in GSM networks... A degree Celsius (°C) is a unit of temperature named after the Swedish astronomer Anders Celsius (1701-1744), who first proposed a similar system in 1742. ... Fahrenheit is a temperature scale named after the German physicist Gabriel Fahrenheit (1686–1736), who proposed it in 1724. ... Universal Time (UT) is a timescale based on the rotation of the Earth. ... March 29 is the 88th day of the year in the Gregorian Calendar (89th in Leap years). ... 1974 (MCMLXXIV) was a common year starting on Tuesday (the link is to a full 1974 calendar). ...


After looping once around the Sun while Mercury completed two orbits, Mariner 10 flew by Mercury again on September 21, 1974 at a more distant range of 48,070 km (29,850 mi). For other uses, see Sun (disambiguation). ... September 21 is the 264th day of the year (265th in leap years). ... 1974 (MCMLXXIV) was a common year starting on Tuesday (the link is to a full 1974 calendar). ...


A third and final encounter, the closest to Mercury, took place on March 16, 1975 at a range of 327 km (203 mi). Contact with the spacecraft was terminated on March 24, 1975. March 16 is the 75th day of the year in the Gregorian Calendar (76th in Leap years). ... 1975 (MCMLXXV) was a common year starting on Wednesday (the link is to a full 1975 calendar). ... March 24 is the 83rd day of the year in the Gregorian Calendar (84th in Leap years). ... 1975 (MCMLXXV) was a common year starting on Wednesday (the link is to a full 1975 calendar). ...


What Mariner 10 found out

On Mariner 10’s mission it successfully mapped half of Mercury’s surface and took over 2800 photos of it, this helped scientists because before Mariner 10 astronomers couldn’t see Mercury because of the excessive glare from the sun. Thanks to Mariner 10 they now also know what the surface of Mercury looks like (similar to the moon). Mariner 10 also found out that mercury has a thin atmosphere made out of mostly helium. As well as this Mariner 10 discovered a magnetic field and discovered a large iron-rich core. When Mariner 10 pasted Venus it discovered evidence of rotating clouds on Venus and it also found out that Venus has a very weak magnetic field. Look up Mercury in Wiktionary, the free dictionary // Mercury, or Mercurius, derives from the Roman god Mercury (mythology). ... An astronomer or astrophysicist is a scientist whose area of research is astronomy or astrophysics. ... For other uses, see Sun (disambiguation). ... Bulk composition of the moons mantle and crust estimated, weight percent Oxygen 42. ... General Name, Symbol, Number helium, He, 2 Chemical series noble gases Group, Period, Block 18, 1, s Appearance colorless Atomic mass 4. ... It has been suggested that Magnetic field density be merged into this article or section. ... General Name, Symbol, Number iron, Fe, 26 Chemical series transition metals Group, Period, Block 8, 4, d Appearance lustrous metallic with a grayish tinge Atomic mass 55. ... Adjective Venusian or (rarely) Cytherean (*min temperature refers to cloud tops only) Atmospheric characteristics Atmospheric pressure 9. ...


External links

Mariner Program
Previous mission: Mariner 9 Next mission: Voyager 1
Mariner 1 | Mariner 2 | Mariner 3 | Mariner 4 | Mariner 5
Mariner 6 and 7 | Mariner 8 | Mariner 9 | Mariner 10

  Results from FactBites:
 
Mariner 10 (108 words)
Mariner 10 was the last spacecraft of the Mariner program, launched on November 3, 1973; this was an unmanned space mission (Mariners 11 and 12 were redesignated as Voyager 1 and Voyager 2).
Mariner 10 was launched ~2 years after Mariner 9 and its mission was to explore Mercury and Venus.
On March 29 and September 21, 1974, and March 16, 1975; Mariner 10 passed by Mercury and was able to map 40-45% of the planet.
Mariner Exploration Missions (447 words)
Mariner 2 was the first successful space probe and the first spacecraft to visit a planet.
Mariner 10 mapped surface of Mercury in 1974 as a part of a fortuitous slingshot orbit with Venus.
When Mariner 10 passed by Venus on February 5, 1974 at a distance of 5770 km, it gained energy from the collision in what is called a slingshot maneuver.
  More results at FactBites »


 

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