天文學(xué)科普知識詳說 (16)

1、1Credit: NASA2Credit: NEAR3開普勒第一定律 Keplers 1st Law4Perigee Apogee近地點遠地點 Credit: NASA33(角分角分)29 (角分角分)5360(度degree)1= 60 (角分arcminute)1= 60 (角秒arcsecond)Credit: HKU & HKSPM6天秤動 Libration7 開普勒第二定律 Keplers 2nd Law8周日天秤動周日天秤動Greg Smye-Rumbsy NMM London 緯天秤動緯天秤動經(jīng)天秤動經(jīng)天秤動5 99Credit: Tomruen月面可見面積:59%10

2、潮潮 汐汐 TideCredit: Samuel WantmanCredit: time berry and simon reed11Credit: 1213Tides 潮汐141516Credit: Introduction to the Worlds Oceans by Alyn & Allison Duxbury 1780:11:1280018地月體系的共同質(zhì)心19Credit: NASALaser Ranging Retroreflector Apollo 11 Credit: McDonald Observatory 20Credit: NAS

3、A每年月球遠離每年月球遠離38mm地球每年自轉(zhuǎn)減慢地球每年自轉(zhuǎn)減慢0.000017秒秒6萬年減慢萬年減慢1秒秒400萬年減慢萬年減慢1分鐘分鐘10億年減慢億年減慢4小時小時6千千500萬年前萬年前(恐龍時代恐龍時代),地球每日地球每日23小時小時21Credit: F. Espenak日食 Solar Eclipse月食 Lunar Eclipse22 1995-2005 Ian Cameron Smith.黃道面黃道面5923Credit: Korado Korlevi 24殷代卜辭 三日乙酉夕，月有食，聞。公元前一二二七年五月三十一日 月全食旬壬申夕，月有食 公元前一一八九年十月廿五日 月

4、偏食25Credit: Stefan Seip詩經(jīng)小雅彼月而食，則維其常26Credit: Stefan Seip靈憲 張衡月光生於日之所照，魄生於日之所蔽；當(dāng)日則光盈，就日則光盡也。當(dāng)日之沖，光常不合者，蔽於地也，是謂暗虛，在星則星微，遇月則月食。2728Credit: Physics Department, The University of Hong Kong29Credit: TEENS清蔚園30半影月食 月偏食 月全食 1995-2005 Ian Cameron Smith.3132Credit: 33Credit: Anthony Ayiomamitis 34Cedit: Stefan Seip 日全食日全食35Cedit: Stefan Seip 日環(huán)食日環(huán)食36C