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...System bodies from contamination by Earth life and protecting Earth from possible life forms that may be returned from other Solar System bodies.​ Approaches to this taken by space agencies and mission teams have changed over the 60 years of Mars exploration and will continue to adapt to new scientific understanding of the planet and of life itself. However, the central...

...system and is a leftover from our planetary formation process. As the comet gets closer to the Sun and becomes heated, the ice can turn straight to gas carrying dust particles out into space. The gas and dust create impressive tails that can reach up to millions of kilometres in length. [Comet C/2020 F3 (Neowise) photographed during July 2020 in the northern sky]Figure 2...

...System. These include ‘hot Jupiters’ orbiting very close to their parent star and rocky ‘super Earths’ many times larger than our home planet. In this free course, The formation of exoplanets, you will learn about the challenges connected with efforts to reconcile the observed exoplanet population with current theories on how planets form. The two main theories...