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Planetary science

Planetary science

Mars is bright tonight

18 May 2017 Tushna Commissariat
Taken from the May 2017 issue of Physics World

Tushna Commissariat reviews 4th Rock from the Sun: the Story of Mars by Nicky Jenner

Mars
True colours. (ESA / Max-Planck Institute for Solar System Research for OSIRIS Team ESA / MPS / UPD / LAM / IAA / RSSD / INTA / UPM / DASP / IDA)

Apart from our home planet of Earth, the red planet is the most visited planet in our solar system. It is not surprising then, that humans have long been interested in and intrigued by Mars, both scientifically and culturally. In 4th Rock from the Sun: the Story of Mars, author Nicky Jenner explores all these aspects of one of our nearest neighbours, going into the planet’s evolution, its geology and its moons, as well covering our robotic explorations of Mars and plans for humans to visit it in the near future. Despite a somewhat banal beginning, Jenner picks up the pace in her opening chapter as she tries to deduce our fascination with the planet, giving the reader a good description of what it would be like to traverse the Martian surface, before describing why, in fact, Mars would make for a rather boring and inhospitable holiday destination. Although most of us will be aware of the rather cold and varying temperatures on Mars, it may come as a surprise to find out that standing on the Martian surface would put your feet tens of degrees warmer than your head. The next few chapters are also interesting – Jenner digs into how human beings have anthropomorphized the planet; the fact that its red hue is particularly eye-catching; the planet’s apparent switch in direction (retrograde motion); and the fact that many respectable scientists were, at one point, convinced that Mars harboured advanced life forms. Other chapters talk about Mars’ moons Phobos and Deimos; “robot cars” or rovers and their exploration of the dusty planet; and the realities of a manned mission to Mars. In a particularly strong chapter, Jenner discusses the “massive Mars problem” – the issue of how Mars’ size has thrown off our theories for how terrestrial planets form. Although the book is somewhat haphazard in its flow, and Jenner occasionally repeats herself, 4th Rock from the Sun is both a useful and enjoyable read, especially for those interested in the planet’s cultural significance as much as the science. Grab a copy to catch up on all things Martian, especially if you plan on visiting the red planet anytime soon.

  • 2017 Bloomsbury Sigma 272pp £16.99hb
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