Physics

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NASA’s discovery of water on Mars Billions of years ago, Mars looked more welcoming to life than Earth was at the time. We have seen evidence of ancient lakes and river beds, but nowadays water on the surface of Mars exist almost entirely as ice. In 2007, scientists observed some dark lines forming in the […]

My friend Russell asked me under which condition an object would be able to stand still around the Sun. This is a very interesting question; it probes some fundamental facts about the solar system and its applications are keeping many engineers around the world busy. Planets go around the Sun due to Sun’s gravitational field.