2020年05月21日:金星的位相-（Phases of Venus） 2020年05月21日:金星的位相-（Phases of Venus）--原图下载{mtitle title="金星的位相"/}Image Credit &Copyright:Richard Addis说明: 就像月亮的位相会有变化一样，金星可见的日耀区也会有盈亏。这幅后院望远镜组合影像，呈现金星在目前以昏星之姿出现的期间，日耀区变宽但面积缩成蛾眉的景象。这幅影像中的金星从下到上，分别摄于2020年2月27日、3月20日、4月14日、4月24日、5月8日和5月14日。在地球与太阳之间的内轨道绕行的金星，在这段期间之所以会变大，是因为它越来越靠近地球。而它会窄如蛾眉，则是因为金星越来越接近地球与太阳的连线。将在6月3日最接近地球-太阳连线，但从比太阳高半度的位置切过的金星，它在此时的位置称为下合。接着不久之后，金星将出现在清晨的天空中，成为地球的晨星。在今晚的日落后，西方地平线上空可见到金星，同时也能找到行蹤隐密的水星。{lamp/}原文：{mtitle title="Phases of Venus"/}Image Credit &Copyright:Richard AddisExplanation: Just asthe Moon goesthrough phases,Venus' visible sunlit hemisphere waxes and wanes.This composite of backyardtelescopic images illustrates the steady changes forVenus duringits current stint as our evening star, as the inner planet growslarger but narrows to a thin crescent.Images from bottom to top were taken during 2020 on datesFebruary 27, March 20, April 14, April 24, May 8, and May 14.Gliding along its interior orbit between Earth and Sun, Venus growslarger during that period because it is approaching planet Earth.Its crescent narrows, though, as Venus swings closer to ourline-of-sight to the Sun.Closest to the Earth-Sun line but passing about 1/2 degree north of theSun on June 3, Venus will reach a (non-judgmental)inferiorconjunction.Soon after, Venus will shine clearly above the eastern horizon inpredawn skies as planet Earth'smorning star.After sunset tonight look for Venus above the western horizonand you can also spotelusive innermost planet Mercury.

2017年03月17日:金星的位相-（Phases of Venus） 2017年03月17日:金星的位相-（Phases of Venus）--原图下载{mtitle title="金星的位相"/}Image Credit &Copyright: Daniel Herron说明: 就像月亮的月相会有变化，金星可见的日耀半球，也会有渐盈和渐亏的变化。这幅望远镜组合影像，呈现这颗内行星在西方天空以昏星之姿，于2016年12月20日到2017年3月20日之间，逐渐变大同时日耀面变窄的景象。在地球与太阳之间的内轨道绕行的金星，在这段期间之所以会变大，是因为它越来越靠近地球。而它的蛾眉相会变窄，则是因为金星越来越靠近地球往太阳的视线方向。在3月25日，金星会最接近地球─太阳的连线，并以8度左右的间距掠过太阳北方带来一次下合。紧接着，金星将会出现在清晨的东方天空，以晨星之姿绽放光芒。 明日的图片: ghostly lights{lamp/}原文：{mtitle title="Phases of Venus"/}Image Credit &Copyright: Daniel HerronExplanation: Just asthe Moon goesthrough phases,Venus' visible sunlit hemisphere waxesand wanes.Thiscomposite of telescopic images illustrates the steady changesfor the inner planet, seen in the west as the evening star,as Venus grows larger but narrows to a thin crescent fromDecember 20, 2016 through March 10.Gliding along its interior orbit between Earth and Sun, Venus growslarger during that period because it is approaching planet Earth.Its crescent narrows, though, as Venus swings closer to our line-of-sightto the Sun.Closest to the Earth-Sun line but passing about 8 degrees north of the Sunon March 25, Venus will reach a (non-judgmental)inferiorconjunction.Soon after, Venus will shine clearly above the eastern horizon inpredawn skies as planet Earth'smorning star.

2004年05月21日:-（Phases of Venus） 2004年05月21日:-（Phases of Venus）--原图下载{mtitle title=""/}Credit & Copyright: JohnRummel说明: 金星现在正慢慢地落在西方的地平面上，它是太阳的第二颗行星，对地球而言，亮度仅次于太阳及月亮，经常出现在日落的地平面上。透过望远镜镜头，可以看到不同时间的相位。事实上，这些有意思叠合的望远镜照片，成功地说明相位的顺序，过去的几週来，金星正慢慢地增加视角。沿着内部的轨道，慢慢地滑动，金星越接近内部的轨道，当越接近地球时，金星看起来越大。同时，就像是月亮经过不同的盈缺，金星的受到太阳的照射区域也不断地增长弯月的形状。现在在天空闪亮的金星，呈现月亏的形状，当六月八日，金星将会通过我们与太阳之间，上次发生是在西元1882年。{lamp/}原文：{mtitle title="Phases of Venus"/}Credit & Copyright: JohnRummelExplanation: Venus is currentlyfalling out of thewestern evening sky.Second planet from the Sun andthird brightest celestial object after the Sun and Moon,Venus has been appreciated by casual sky gazers as a brilliant beaconabove the horizon after sunset.But telescopicimages have also revealed its dramatic phases.In fact, this thoughtful composite oftelescopic views nicely illustrates theprogression of phasesand increase in apparent size undergone by Venus overthe past few weeks.Gliding along its interior orbit, Venus has beencatching up with planet Earth, growing larger as it drawsnear.At the same time, just as the Moon goesthrough phases,Venus' visible sunlit hemisphere has presented anincreasingly slender, crescent shape.Now sharing the sky with a crescent Moon, onJune 8th Venuswill actually cross the face of the Sun, the first suchtransit since 1882.