1. Our planet Earth, together with other planets, revolve around our Sun in what is called our Solar system. 我们的行星地球，连同其他行星，围绕我们的太阳旋转，这就是我们的太阳系。
2. Of course, we now know that the planets, including Earth, revolve around the Sun, and that the solar system is only a tiny part of the universe. 当然，我们现在知道，包括地球在内的行星都围绕太阳公转，而太阳系只是宇宙的一小部分。
3. Geocentric means Earth-centered, so the geocentric view holds that the Sun, the planets, and the stars, all revolve around the Earth, which is stationary. 地心论是指以地球为中心，所以地心论认为，太阳、行星和恒星都围绕着地球旋转，而地球是静止的。
4. Mars takes longer to revolve on its axis than the earth. 火星自转一周的时间比地球长。
