太阳和太阳圈探测器（Solar and Heliospheric Observatory，SOHO)是由以马特拉马可尼航太公司（现在的阿斯特里姆）为首的欧洲工业财团制造，使用洛克希德马丁的擎天神2号运载火箭于1995年12月2日发射。它是研究太阳的太空船，迄今已发现超过3,000颗彗星。它从1996年5月开始正常运作，是欧洲航天局和NASA联合的一个国际合作专案。最初的计划只是一个两年的任务，但SOHO将在太空中服务超过20年。在2013年6月，一个延展的计划获得批准，它至少将持续工作至2016年12月。

The Solar and Heliospheric Observatory (SOHO) is a spacecraft built by a European industrial consortium led by Matra Marconi Space (now Astrium) that was launched on a Lockheed Martin Atlas II AS launch vehicle on December 2, 1995 to study the Sun, and has discovered over 3000 comets. It began normal operations in May 1996. It is a joint project of international cooperation between the European Space Agency (ESA) and NASA. Originally planned as a two-year mission, SOHO continues to operate after over 20 years in space. In June 2013, a mission extension lasting until December 2016 was approved.