原行星盘如何被观测？
How are protoplanetary disks observed?
ALMA等毫米波阵列能解析原行星盘内的环与缝隙，这些结构被认为是行星正在形成的证据，直接展示恒星与行星系统的“摇篮”。
Millimeter arrays like ALMA resolve rings and gaps inside protoplanetary disks; these structures are taken as evidence of planets forming, directly showing the 'cradle' of star and planet systems.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Chaisson & McMillan,《Astronomy Today》Pearson 多版
E. Chaisson and S. McMillan, Astronomy Today, Pearson, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 标识 /works/OL1919527W（按标识回读: Astronomy tod
#原行星盘 #ALMA #行星形成
什么是地球相似指数（ESI）？
What is the Earth Similarity Index (ESI)?
ESI综合半径、密度、表面温度等参数给出与地球的相似度（0到1），用于筛选最可能宜居的候选，但只是粗略的排序工具。
The ESI combines radius, density and surface temperature into a similarity-to-Earth score (0 to 1), used to rank the most promising habitable candidates, though it is only a rough sorting tool.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Chaisson & McMillan,《Astronomy Today》Pearson 多版
E. Chaisson and S. McMillan, Astronomy Today, Pearson, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 标识 /works/OL1919527W（按标识回读: Astronomy tod
#地球相似指数 #宜居 #排序
“金发姑娘”宜居带只看温度吗？
Does the 'Goldilocks' habitable zone depend only on temperature?
宜居不仅要求液态水温度，还要合适的大气压、磁场、大气成分与恒星活动；综合这些的“宜居性”比单纯宜居带更严格。
Habitability needs not just liquid-water temperature but suitable atmospheric pressure, magnetic field, atmospheric composition and stellar activity; true habitability is stricter than the simple habitable zone.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Chaisson & McMillan,《Astronomy Today》Pearson 多版
E. Chaisson and S. McMillan, Astronomy Today, Pearson, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 标识 /works/OL1919527W（按标识回读: Astronomy tod
#宜居性 #综合条件 #磁场