1700929399
1700929400
HubbIe’s Iaw哈勃定律256,257,273,420;
1700929401
1700929402
redshift observations红移观察248—261,259,270,277—279,282,336
1700929403
1700929404
Huggins, Margaret玛格丽特·哈金斯238,239,244
1700929405
1700929406
Huggins, WiIIiam威廉·哈金斯238—239,238,241,24—26
1700929407
1700929408
Humason, MiIton米尔顿·休马森250—252,255,258—260,259,273,279
1700929409
1700929410
Hutton, James詹姆斯·霍顿79
1700929411
1700929412
HuxIey, Thomas托马斯·赫胥黎9
1700929413
1700929414
Hyades毕星团135
1700929415
1700929416
hydrogen氢247,420,486;
1700929417
1700929418
abundance丰度283—285,308—309,318,323,326,327,369,473,476;
1700929419
1700929420
atom原子293—295,294,297,322;
1700929421
1700929422
at Big Bang大爆炸310,320;
1700929423
1700929424
fusion into heIium聚变成氦300—302,303—305,304,309,397;
1700929425
1700929426
intergaIactic cIouds星系际云424;
1700929427
1700929428
transition from pIasma to atoms从等离子体到原子的转变330,331
1700929429
1700929430
I
1700929431
1700929432
Ibn Sina伊本·西纳88
1700929433
1700929434
Independent《独立报》472,47—50
1700929435
1700929436
infIation暴胀477—479,482,488
1700929437
1700929438
infrared红外230,233,407
1700929439
1700929440
interference干涉95
1700929441
1700929442
interferometry干涉仪412
1700929443
1700929444
InternationaI AstronomicaI Union国际原子能联合会364,379,422
1700929445
1700929446
Io木卫一90—91,91
1700929447
1700929448
isotopes同位素293,294,302,303,304,400
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