黎明前水星在金星下

单击此处查找有关Taurid流星雨的信息

汞–太阳系的最内层行星–经常在阳光下迷路’s glare. As viewed from 地球, this world is 关ly tethered to the sun, and even when 汞swings farthest from the sun on the sky’s dome, it’并非总是容易看到。什么时候’在太阳的东边和一个晚上“star,” 汞often has to contend with the afterglow of sunset; or when it’太阳在早晨西边“star,”这个最里面的星球通常必须与黎明的光芒竞争。

汞appears 在 the morning sky all through November 2020. But it’s on November 10 that 汞reaches its greatest western (morning) elongation from the sun. Although Mercury’世界范围内的伸长率相同(19 度数 west of the sun), the span of time between 汞rise and sunrise is greater at more northerly latitudes and less at more southerly latitudes. This November 2020 morning apparition of 汞very much favors the Northern Hemisphere.

Diagram showing solar system from above, and 汞at eastern and western elongation.

不按比例。汞’s与太阳的平均距离约为地球的0.39倍’与太阳的距离。我们’从太阳系平面的北侧向下看,在这种情况下,水星和地球沿逆时针方向绕太阳旋转。从太阳系的北侧看,地球和水星也逆时针旋转。在其最大的东部伸长率下,日落之后在西方可以看到水星。在最大的西方伸长率下,水星在日出前的东方可见。

At mid-northern latitudes, 汞even rises a short while before 天文光 (黎明’的第一盏灯)。想知道天文暮光何时进入您的早晨天空吗?点击 老农夫’s Almanac (美国和加拿大)或 日落日落日历 (请务必检查 天文的暮光之城 框)。

We give the approximate rising time for 汞at various latitudes for the next several mornings (given a level horizon):

北纬60度
汞rises 2 1/2 hours (150 minutes) before the sun

纬度40度
汞rises 1 2/3 hours (100 minutes) before the sun

赤道(纬度0度)
汞rises 1 1/10 hours (70 minutes) before the sun

南纬35度
汞rises 3/4 hour (45 minutes) before the sun

需要更多具体信息吗?尝试 老农夫’s Almanac (美国和加拿大)或 时间和日期 (全世界)

无论您住在世界各地’s best to find an unobstructed horizon 在 the direction of sunrise for your 汞quest. Find a hill or balcony, so that you can peek peek just a little farther over the horizon. That little extra could make the difference 在 sighting – or not sighting –汞,尤其是在南纬地区。双筒望远镜也能提供帮助!

这里’如何从世界各地找到水星。在11月10日至11日,寻找逐渐减弱的新月和耀眼的金星。这两个出色的美女应该很容易看到。毕竟,在太阳之后,月亮和金星分别是第二明亮的天体和第三明亮的天体。从月球到金星的假想线指向水星的大致方向。黎明前的黑暗开始让位给暮光之城,在地平线附近寻找水星。如果你可以的话’不能用肉眼看到水星,请用双筒望远镜试试运气。

The waning crescent moon flits by the planets Venus and 汞in the morning sky.

渐弱的新月月亮赢了’预计在2020年11月11日至12日的高峰时段破坏北塔里德流星雨。’用金星和水星观看细长的新月形月亮一定是一种享受!

汞is quite bright right now, some 4 times brighter than a 一等星. In fact, there will be a 一等星 near 汞on the sky’s dome: 角宿, the brightest star 在 the constellation Virgo the Maiden. Try not to mistake 角宿 for 汞or vice versa! 汞will probably appear as the brighter of the two.

For northerly latitudes, this upcoming week presents a golden opportunity to spot 汞in the morning sky. What’s more, 汞will continue to brighten as this world rises better than 1 1/2 hours (90 minutes) before the sun (at mid-northern latitudes). Look for low 在 your eastern sky, and below Venus, as the morning darkness first gives way to morning dawn.

布鲁斯·麦克卢尔