再入 Atmospheric entry
（重定向自Semiballistic）
进入大气（层），是指自然物体或人造物体从外层空间进入行星大气层的运动过程。如果人造物体（如人造卫星、飞船、火箭导弹、空天飞机等）离开地球大气层，再从外太空重新进入地球大气层的运动，称为“再入”（reentry）大气层。
例如，火星探测器在火星表面软着陆，就只能称为“进入”火星大气层，而不能称“再入”火星大气层。
Semiballistic
中文百科
英语百科
Atmospheric entry 再入
（重定向自Semiballistic）
Atmospheric entry is the movement of an object from outer space into and through the gases of an atmosphere of a planet, dwarf planet or natural satellite. There are two main types of atmospheric entry: uncontrolled entry, such as in the entry of astronomical objects, space debris or bolides; and controlled entry, such as the entry (or reentry) of technology capable of being navigated or following a predetermined course.
- heldentenor的意思
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