黑话

深空狩猎场

深空猎人

银河狩猎

室女座：彗星猎人的坟场

室女座：星系猎人的狩猎场

每个深空观察者都有一个收藏夹列表：行星状星云，天空透明性的测试对象，或在条件合适的夜晚在夜晚扫荡的特殊天堂区域。我的一个宠物物品放在7月傍晚的天空上位置良好，靠近处女座和Serpens之间的边界-引人注目的球状星团M5。

Every deep-sky observer has a list of favorites: a planetary nebula, a test object for sky transparency, or a special area of the heavens to sweep on nights when the conditions are just right.

One of my pet objects is well placed in the July evening skies, near the border between Virgo and Serpens — the remarkable globular cluster M5.

北边M5和M13最优秀，只被47和omega超越

Galaxy Chains in Cetus

lust as open clusters dominate our view of the starry band of the Milky Way, galaxies tend to be most numerous in those parts of the sky farthest from this region, where dense star clouds and obscuring dust can block our view of deep space. Such is true for the constellation Cetus, now in the evening sky. “It is a vast stellar desert,” Scotty wrote, “but a rich area for galaxy hunters.” Amateurs equipped with only a 3-inch or 4-inch telescope can pick out many galaxies, and a 12’Z>-inch will show many more of them. Here Scotty describes a series of galaxy chains in Cetus and a mysterious planetary nebula that should keep novices and seasoned observers busy during the long December nights.

由于开放星团在我们对银河系繁星带的视野中起着主导作用，因此在离该区域最远的那部分天空中，星系往往数量最多，在那里浓密的星云和遮盖的尘埃会阻塞我们对深空的视野。对于现在处于傍晚天空中的Cetus星座而言，情况确实如此。斯科蒂写道：“这是一片广阔的恒星沙漠，但对于银河系猎人来说却是一片富饶的地区。” 仅配备3英寸或4英寸望远镜的业余爱好者可以挑选出许多星系，而12’Z>英寸的星系将显示更多星系。Scotty在这里描述了Cetus中的一系列星系链和一个神秘的行星状星云，这些星云应该使新手和经验丰富的观察者在漫长的12月夜晚忙碌起来。