Understanding Kepler's Laws of Planetary Motion | Britannica
Mars orbit
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Orbit of Mars – Planetary Sciences, Inc.
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Mars Opposition | Mars in our Night Sky – NASA's Mars Exploration Program
Hohmann transfer orbit diagram | The Planetary Society
Solar event will halt communication with Mars missions for 2 weeks - CNN
How Long is a Year on Other Planets? | NASA Space Place – NASA Science for Kids
The long road to Mars – Physics World
Mars - Basic astronomical data | Britannica
The Orbit of Mars. How Long is a Year on Mars? - Universe Today
Emirates Mars Mission: Hope spacecraft enters orbit - BBC News
Orbit of Mars - Wikipedia
2017-2019: Mars Observing Year with a Perihelic Opposition, July 27, 2018 – When the Curves Line Up
ESA - Close encounters with Mars
Mars at opposition shines extra bright in the night sky tonight | Space
How far away is Mars, why is the planet red and how long does it take to get there?
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Watch Mars Make Its Closest Approach To Earth Until 2035
