1. With the Sun at the centre, as in for example the heliocentric system of cosmology (see copernican system).
2. As seen from the centre of the Sun, as in for example heliocentric coordinates.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。