How long does it take the earth to complete one orbit arond the sun

Earth takes a little more than 365 days and nights to orbit the Sun. This is how we measure 1 year of time.

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.