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In this blog, we have covered the phases of the Moon in the previous post, so here we will briefly discuss the questions posed in the two videos above. How long does the Earth take to travel around the Sun? Obviously, the answer is one year or 365.25 days.
A low orbit will have an orbital period of roughly 100 minutes and the Earth will rotate around its polar axis with about 25 deg between successive orbits, with the result that the ground track is shifted towards west with these 25 deg in longitude.Most are in sun-synchronous orbits.he Proba-1, Proba-2 and SMOS spacecraft of European Space Agency are observing the Earth from an altitude of about 700 km. To get (nearly) global coverage with a low orbit it must be a polar orbit or nearly so.