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Become a nitrogen atom in the nitrogen cycle in our Traveling Nitrogen Classroom Activity Kit/Game. See all our games, activity kits and classroom activities.
Image of Mariner 10
NASA/JPL

Mariner 10

Mariner 10 was launched on Nov. 3, 1973, intended as a flyby of planets Venus and Mercury.

It passed Venus in February of 1974, returning over 4000 photographs of it's thick cloud cover and information on the atmosphere composition. Mariner 10 then used Venus's gravity to gain speed and travel to Mercury, passing by the planet three times over the next year.

From the Mariner 10 mission, 57% of Mercury's surface was mapped, revealing many craters similar to those on our Moon. The last Mariner spacecraft is now out of energy and in orbit around the sun.


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Our online store includes fun classroom activities for you and your students. Issues of NESTA's quarterly journal, The Earth Scientist are also full of classroom activities on different topics in Earth and space science!

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA