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Three flybys
- The final mission in the series, Mariner 10, flew past Venus before going on to Mercury for a total of three flybys.
science.nasa.gov/mission/mariner-program/
During its flyby of Venus, Mariner 10 discovered evidence of rotating clouds and a very weak magnetic field. Using a near-ultraviolet filter, it photographed Venus's chevron clouds and performed other atmospheric studies. The spacecraft flew past Mercury three times.
On Feb. 5, 1974, the spacecraft began returning images of Venus, the first picture showing the day-night terminator of the planet as a thin bright line. Overall, Mariner 10 returned 4,165 photos of Venus and collected important scientific data during its encounter. The closest flyby range was 3,584 miles (5,768 kilometers) at 17:01 UT Feb. 5, 1974.
- United States of America (USA)
- Mariner-73J / Mariner-J
- Mercury Flyby, Venus Flyby
- 1,100 pounds (502.9 kilograms)
The final mission in the series, Mariner 10, flew past Venus before going on to Mercury for a total of three flybys. Mariner 9 became the first spacecraft to orbit another planet when it reached Mars in 1971.
Feb 5, 2019 · The spacecraft approached Venus from its night side, and passed within 3,584 miles of the planet on Feb. 5, 1974. During the fly-by, Mariner 10 performed flawlessly and sent back information about Venus’ atmosphere and environment and beamed back the first close-up images of the cloud-shrouded planet.
Nov 5, 2018 · In just over 500 days, on a journey of more than a billion kilometers, Mariner 10 visited Venus once and Mercury three times, returning 7,000 photographs and greatly expanding our understanding of both planets.
- John Uri
Mar 29, 2019 · The spacecraft passed within 3,584 miles of Venus on Feb. 5, 1974, returning more than 4,000 images and contributing significantly to our understanding of the cloud-shrouded planet during its flyby.
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Mariner 10 flew past Venus on February 5, 1974, at a distance of 4,200 kilometers (2,610 miles). More than 4,000 photos of Venus revealed a nearly round planet enveloped in smooth cloud layers. Venus exhibited a slow rotational period of 243 days and had only 0.05 percent of Earth's magnetic field.
