特定的区域

https://astronomy.stackexchange.com/questions/8175/the-name-of-a-particular-low-extinction-region

http://en.wikipedia.org/wiki/Lockman_Hole

It has a column density of neutral hydrogen of 6×10196×1019 cm−2−2, which will correspond to very little dust.

Two others I’ve heard of towards the Galactic bulge are known as the Sgr I and Sgr II windows.

Finally, I offer “Stanek’s window” towards the bulge, which has been referred to in a number of the Chandra Galactic plane X-ray surveys but appears to have no refereed publication associated with its discovery. I found this on arXiv. http://arxiv.org/abs/astro-ph/9802307 It is at l=0.25l=0.25, b=−2.15b=−2.15 and has E(B−V)∼0.6E(B−V)∼0.6.

Sgr A*	Galactic Centre	The galactic centre is denoted by the a bright radio source called Sagittarius A* (pronounced Sagittarius A Star). It is thought to be the location of the supermassive black hole at the very centre of our galaxy.

https://www.constellation-guide.com/sagittarius-a/

Plaut’s window, which is located at l=0° and b=-8°. It has a reddening of E(B-V)=0.25 magnitudes.

Puppis Window? (Neutral hydrogen observations towards the Puppis Window of the Milky Way)

到目前为止，HI中最显着的特征是连接所有三个星系的潮汐桥。van der Hulst（1979）先前已将连接M81和NGC 3077 的桥（“南潮汐桥 ”）绘制成地图，此功能似乎在NGC 3077周围循环并指向M82（“北潮汐桥”）。

1 NAME Sgr I Window
2 NAME Sgr II Window

3 NAME Baade Window

4 NAME Plaut’s Window
5 NAME Stanek Window

Circinus Window

http://simbad.u-strasbg.fr/simbad/sim-ref?querymethod=bib&simbo=on&submit=submit+bibcode&bibcode=1977A%26A....54...71L

Lockman Window

Puppis Window

http://simbad.u-strasbg.fr/simbad/sim-ref?querymethod=bib&simbo=on&submit=submit+bibcode&bibcode=1982A%26AS...50..377S

NAME Aql Rift
NAME Northern Coalsack (NAME Cyg Rift)
NAME Great Dark Rift
NAME Great Rift
NAME North Galactic Pole Rift
NAME Vul Rift