
, Subscribe Today Renew Give a Gift Archives Customer Service Facebook Twitter Newsletter SEARCH Health Medicine Mind Brain Technology Space Human Origins Living World Environment Physics Math Video Photos Podcast RSS Q BA : Which moon has the best chance for life Earth Day , from 40,000 km up Venus , from one side of the Sun to another The dance of the planets fascinates me . All the planets orbit the Sun , keeping their own time depending on how far they are from our star . From our vantage point on Earth , circling the Sun once per year , the planets move across our sky slowly , stately , taking weeks or months to get from one side to the . other Venus is closer to the Sun , and takes only 225 days to orbit it . From Earth , that makes its motion pretty complicated . Sometimes we see it