标签：#拟议中的航天器

展望号探测器

{{Infobox spaceflight | name = 展望号 | names_list = | image = | image_caption = | image_alt = | image_size = | mission_type = 侦测 | operator = 欧空局 | COSPAR_ID = | SATCAT = | website = | mission_duration = 4.5 年 (理论上) | spac…