第14章 霜蹄追风尝随骠(三)
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章惇的问题,似乎是在说反话,极力隐藏着心头的怒火。
章持干咳了两声:“祸福休咎,儿子还是不会。只是用来看一看月亮的盈亏变化。”
“还有银河。”章援提议道“用千里镜照过之后,全都是星星,根本不是什么天河。”
“哦?”章惇原本是想训话的,可这一下却被惊住了,忍不住拿起千里镜对着天穹上的繁星望过去。
初冬的望日,天无纤云,月白如昼。
横贯天际的银河,平常看过去时,就是一条雾气弥散的河流,但透过望远镜的镜片,章惇却惊讶的发现,那一丝丝云雾,已经被分解成密密麻麻的星子。想来就是因为星星太多太密,聚在一起,让人误以为是天上的江河。而惯常所见的星辰周围,又多了千万颗不知名的星星,只是太过暗弱,让会人忽略过去。
章惇在天文上见识不算多,没什么研究,不知道过去有没有人发现银河的真面目。不过古往今来描述银河的诗句,都脱不开银河、天河、星汉一类与河流关联的辞藻。
章惇一声慨叹,今日方知银河乃是何物。
他又记起章援的话,将千里镜挪移了一个角度,又对准月亮照过去。
月中yin影,世传是嫦娥的yù兔,吴刚的桂huā,乃至有山寺月下寻桂子的诗句,但在千里镜中,桂huā也好,兔子也好,从透明的镜片中瞧过去,全都消失不见,仅仅是大大小小、颜sè略深的圆圈。
看来看去,章惇总觉得那些圆圈像是井口,又或是坑dòng。在广西,大约邕州辖下的羁縻州武笼州百sè再往北去的地方,章惇就听说过那里的山岭中有几十上百的圆形深坑,最大一个,深阔皆达百丈以上。或许月亮上的圆形yin影就是这样的深坑。
不知韩冈知不知道,以他对天文的了解,也许会知道其中的详情,章惇还记得当年曾经有一次与韩冈谈到天文。据韩冈所说,月亮、大地和太阳,皆是球形,是一个绕着一个,日月的等级,如同祖孙,并不是可以并称的。月亮的光是反shè阳光而来,所以盈亏的变化,只是面对太阳和大地角度不同的结果。而所谓的日食和月食,则是三者互相掩映而产生。
韩冈的说法对章惇来说很是新奇,不过后来韩冈便绝口不谈星象天文的话题,章惇见状也就不再追问,反正他对天文星象也没什么兴趣。
放下手中的千里镜,章惇摇摇头。虽然自己对天文兴趣不大,可士大夫中,爱好天文地理的数不胜数。只是数算一关,便挡住了不知多少人的钻研天文的道路。而观测星象的器具,除了一对ròu眼之外,无不是只有官府才能造的出来,浑仪、浑象岂是普通人能够打造?但一具能观星的千里镜可是方便得多。再过几年,千里镜多半就跟显微镜一样,在有些身家的士大夫家中普及。那时候,想必每天都会有成百上千的人跟今天的自己一样,望着夜空中的星和月。
只是对章惇来说,地上的事都还没有梳理清楚,那还有心去管天上的事。正如夫子曾言‘未能事人,焉能事鬼?’鬼神之事,与人无尤。天上的事就归于天好了,生活在地上,还是关注人事为上。
‘不过,暂时由着他们来吧。’章惇想着,将千里镜还给章持。
正对着两个战战兢兢的儿子,章惇道:“平日里,你们还是要把心放在功课上,进士才是一切的根基。不过张弛有道,一天到晚读书,也不一定能有多少进步。歇下来时,摆nòng一下显微镜什么的倒也不妨事。”
章惇年轻的时候也làngdàng过,甚至还偷过同族长辈家的小妾,但轮到自己的儿子身上,他可就是无论如何都不愿看到他们有样学样。平日里两个儿子读书也是辛苦了,拿着显微镜,或是研究一下格物之道放松一下,总比跟着那一干不成材的浮làng子弟,去秦楼楚馆消遣要强。虽说物理、算学、自然什么的都是五经之外的学术,可如今也算是正经的学问了。
章惇又指了指千里镜,正sè肃容:“不过这千里镜还是先放一放,星象谶纬向来连在一起说的,si习天文如今虽然查禁得不如国初那般森严了,但真要入罪,最轻都是流放。天子近来御体欠佳,太皇太后沉疴难起,八皇子又夭折了,谶纬的嫌疑,能躲多远就躲多远。”
章持、章援闻言悚然,齐声道:“孩儿明白。”
“所谓法不责众。等过两年,千里镜跟显微镜一样流传开了,再随大流去研习也不迟。”章惇抬眼望着群星密布的夜空,“到时候,若是在这方面有什么不明白的地方,也可以去问韩yù昆,他藏着掖着的,还不知有多少。”
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