木卫三的影子之下

2022年10月7日

In Ganymede’s Shadow
Image Credit & Copyright: Andrew McCarthy

Explanation: At opposition, opposite the Sun in Earth’s sky, late last month Jupiter is also approaching perihelion, the closest point to the Sun in its elliptical orbit, early next year. That makes Jupiter exceptionally close to our fair planet, currently resulting in excellent views of the Solar System’s ruling gas giant. On September 27, this sharp image of Jupiter was recorded with a small telescope from a backyard in Florence, Arizona. The stacked video frames reveal the massive world bounded by planet girdling winds. Dark belts and light zones span the gas giant, along with rotating oval storms and its signature Great Red Spot. Galilean moon Ganymede is below and right in the frame. The Solar System’s largest moon and its shadow are in transit across the southern Jovian cloud tops.

Tomorrow’s picture: light-weekend

木卫三的影子之下
影像提供与版权: Andrew McCarthy

说明: 上个月底，在地球天空中与太阳反向（冲）的木星，正在往近日点前进，将于明年初，运行到其椭圆轨道上离太阳最近的位置。这也让木星极为接近我们美丽的地球，所以目前是观赏太阳系最大气态巨行星的绝佳时机。作为范例，这幅记录于9月27日的清晰木星影像，就是用小望远镜摄于亚利桑那州．佛罗伦斯镇的一座后院。而这幅用影片定格叠合而成的影像，则清晰的呈现了这颗以环绕行星风带为包覆的庞大行星。影像中，可见到横跨这颗气态巨行星的暗色云带和明亮云区，以及回旋的椭圆风暴和它标志性的大红斑。此外，伽利略卫星之一的木卫三位在影像的右下方。这颗太阳系最大的卫星和它的影子，正在凌越南方的木星云顶。

明日的图片: light-weekend