Day and night. The Earth is a sphere, or ball, which spins round and round as it travels around the sun. ... The side facing away is cooler and darker, and experiences night. Because the Earth is constantly spinning, the line between day and night is always moving around the planet.www.dkfindout.com/us/space/solar-system/day-and-night/
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I am Elizabeth Smith, a doctor from London, United Kingdom. It would be very important to have a doctor on the first manned mission to Mars because it would be safer and people can be covered with healthy lifestyles. I can save lives and help people become more healthy, suited and or ready for this mission. I am excited to go on this adventure because it is a great opportunity to learn life lessons and skills with the help of others. Learning more about other cultures and continuing to be a responsible person can be an adventure that I will take to Mars!