After passing Mercury the first time and making a trip around the Sun, NASA's Mariner 10 again flew by Mercury on Sept. 21, 1974. This encounter brought the spacecraft in front of Mercury in the southern hemisphere.
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Hero Rupes Scarp

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Related Images

  • A fresh new crater in the center of an older crater basin is shown in this picture of the surface of Mercury taken March 29, 1974 by NASA's Mariner 10.
    A fresh new crater in the center of an older crater basin is shown in this picture of the surface of Mercury taken March 29, 1974 by NASA's Mariner 10.

    Fresh Crater in Center of Older Crater Basin

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    NASA's Mariner 10 took this picture some 2 1/2 hours before it passed Mercury on March 29, 1974. The bright-floored crater is the center of a very large bright area which could be seen in pictures from more than two million miles distant
    NASA's Mariner 10 took this picture some 2 1/2 hours before it passed Mercury on March 29, 1974. The bright-floored crater is the center of a very large bright area which could be seen in pictures from more than two million miles distant

    Kuiper Crater

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    After passing Mercury the first time and making a trip around the Sun, NASA's Mariner 10 again flew by Mercury on Sept. 21, 1974. This encounter brought the spacecraft in front of Mercury in the southern hemisphere.
    After passing Mercury the first time and making a trip around the Sun, NASA's Mariner 10 again flew by Mercury on Sept. 21, 1974. This encounter brought the spacecraft in front of Mercury in the southern hemisphere.

    Hero Rupes Scarp

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    This image, from NASA's Mariner 10 spacecraft which launched in 1974, is of the northeastern quadrant of the Caloris basin and shows the smooth hills and domes between the inner and outer scarps and the well-developed radial system east of the outer scarp
    This image, from NASA's Mariner 10 spacecraft which launched in 1974, is of the northeastern quadrant of the Caloris basin and shows the smooth hills and domes between the inner and outer scarps and the well-developed radial system east of the outer scarp

    Northeastern Quadrant of the Caloris Basin

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    This image, from NASA's Mariner 10 spacecraft which launched in 1974, shows several scarps, which appear to be confined to crater floors. The scarp in the crater at the upper left of the image has been diverted by the central peaks.
    This image, from NASA's Mariner 10 spacecraft which launched in 1974, shows several scarps, which appear to be confined to crater floors. The scarp in the crater at the upper left of the image has been diverted by the central peaks.

    Scarps Confined to Crater Floors

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  • After passing Mercury the first time and making a trip around the Sun, NASA's Mariner 10 again flew by Mercury on Sept. 21, 1974. This encounter brought the spacecraft in front of Mercury in the southern hemisphere.
    After passing Mercury the first time and making a trip around the Sun, NASA's Mariner 10 again flew by Mercury on Sept. 21, 1974. This encounter brought the spacecraft in front of Mercury in the southern hemisphere.

    Similarities to Lunar Highlands

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    NASA's Mariner 10 took this picture of the densely cratered surface of Mercury when the spacecraft was 18,200 kilometers (8085 miles) from the planet on March 29, 1974.
    NASA's Mariner 10 took this picture of the densely cratered surface of Mercury when the spacecraft was 18,200 kilometers (8085 miles) from the planet on March 29, 1974.

    Mercury's Densely Cratered Surface

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    As NASA's Mariner 10 approached Mercury at nearly seven miles per second on March 29, 1974, its TV camera took this picture from an altitude of 35,000 kilometers (21,700 miles) The picture shows a heavily-cratered surface with many low hills
    As NASA's Mariner 10 approached Mercury at nearly seven miles per second on March 29, 1974, its TV camera took this picture from an altitude of 35,000 kilometers (21,700 miles) The picture shows a heavily-cratered surface with many low hills

    Mercury's Heavily Cratered Surface

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    This image, from NASA's Mariner 10 spacecraft which launched in 1974, shows intercrater plains and heavily cratered terrain typical of much of Mercury outside the area affected by the formation of the Caloris basin.
    This image, from NASA's Mariner 10 spacecraft which launched in 1974, shows intercrater plains and heavily cratered terrain typical of much of Mercury outside the area affected by the formation of the Caloris basin.

    Intercrater Plains and Heavily Cratered Terrain

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    This image, from NASA's Mariner 10 spacecraft which launched in 1974, is a high-resolution picture of a 65-kilometer diameter crater and the scarp transecting its floor.
    This image, from NASA's Mariner 10 spacecraft which launched in 1974, is a high-resolution picture of a 65-kilometer diameter crater and the scarp transecting its floor.

    Crater Rim Offset 10 kilometers by Scarp-High Resolution

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  • The craters in this image NASA's Mariner 10 spacecraft, which launched in 1974, have interior rings of mountains and ejecta deposits which are scarred by deep secondary crater chain groves.
    The craters in this image NASA's Mariner 10 spacecraft, which launched in 1974, have interior rings of mountains and ejecta deposits which are scarred by deep secondary crater chain groves.

    Crater Chain Groves Inside Larger Craters

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    This image, from NASA's Mariner 10 spacecraft which launched in 1974, shows a crater just north of the Caloris Planitia displays interior and central peaks rising up from a hilly floor.
    This image, from NASA's Mariner 10 spacecraft which launched in 1974, shows a crater just north of the Caloris Planitia displays interior and central peaks rising up from a hilly floor.

    Interior Peaks and Hilly Floored Crater

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    NASA's Mariner 10 spacecraft was coaxed into a third and final encounter with Mercury in March of 1975. This is one of the highest resolution images of Mercury acquired by the spacecraft. The prominent scarp snaking up the image was named Discovery Rupes.
    NASA's Mariner 10 spacecraft was coaxed into a third and final encounter with Mercury in March of 1975. This is one of the highest resolution images of Mercury acquired by the spacecraft. The prominent scarp snaking up the image was named Discovery Rupes.

    Discovery Rupes Scarp

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    After passing Mercury the first time and making a trip around the Sun, NASA's Mariner 10 again flew by Mercury on Sept. 21, 1974. The south pole is located on the right hand edge of Chao Meng Fu crater that has only its rim sticking up into the light.
    After passing Mercury the first time and making a trip around the Sun, NASA's Mariner 10 again flew by Mercury on Sept. 21, 1974. The south pole is located on the right hand edge of Chao Meng Fu crater that has only its rim sticking up into the light.

    Mercury's South Pole

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    This image, from NASA's Mariner 10 spacecraft which launched in 1974, shows a scarp (upper left corner of the image) about 130 kilometers long cutting two craters (older crater is at extreme left corner, younger is diagonally below).
    This image, from NASA's Mariner 10 spacecraft which launched in 1974, shows a scarp (upper left corner of the image) about 130 kilometers long cutting two craters (older crater is at extreme left corner, younger is diagonally below).

    Crater Rim Offset 10 kilometers by Scarp

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  • Mercury's south pole was photographed by one of NASA's Mariner 10's TV cameras; the pole is located inside the large crater on Mercury's limb (lower center).
    Mercury's south pole was photographed by one of NASA's Mariner 10's TV cameras; the pole is located inside the large crater on Mercury's limb (lower center).

    Mercury's South Pole

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    The first image of Mercury acquired by NASA's Mariner 10 in 1974. Mariner 10's trajectory brought it behind the lighted hemisphere of Mercury in order to acquire important measurements with other instruments.
    The first image of Mercury acquired by NASA's Mariner 10 in 1974. Mariner 10's trajectory brought it behind the lighted hemisphere of Mercury in order to acquire important measurements with other instruments.

    Planet Mercury

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    Updated calibration and subsequent mosaicing led to substantial improvements in NASA's Mariner 10 color image data; the spacecraft launched in 1974.
    Updated calibration and subsequent mosaicing led to substantial improvements in NASA's Mariner 10 color image data; the spacecraft launched in 1974.

    Incoming Hemisphere - Enhanced Color

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    This photograph of Mercury, taken by NASA's Mariner 10, shows two prominent rayed craters. Bright halos extend as far as 2 crater diameters beyond crater rims. Individual rays extend from halo.
    This photograph of Mercury, taken by NASA's Mariner 10, shows two prominent rayed craters. Bright halos extend as far as 2 crater diameters beyond crater rims. Individual rays extend from halo.

    Prominent Rayed Craters

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    One of NASA's Mariner 10's two TV cameras took this picture of a densely cratered region of Mercury on Sept. 21, 1974, 80 minutes prior to the spacecraft's second close encounter with the planet.
    One of NASA's Mariner 10's two TV cameras took this picture of a densely cratered region of Mercury on Sept. 21, 1974, 80 minutes prior to the spacecraft's second close encounter with the planet.

    Densely Cratered Region

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