The Helix Nebula

NGC6822 is located approximately 1.6 million light-years from Earth, in the constellation Sagittarius. A member of the Milky Way galaxy's Local Group, it was discovered by E.E. Barnard in the early 1880s. Edwin P. Hubble conducted the first detailed investigation of the galaxy in 1925, using the new 100-inch telescope on Mount Wilson. An analysis of these plates by then-graduate student Susan E. Kayser in 1966 has remained the most complete study of this galaxy until now. This color representation was put together by Travis Rector (NRAO), by combining images taken in seven of the eight filters: U (violet), B (blue), V (green), R (orange), I (red), Hydrogen-Alpha (red) and Oxygen [OIII] (blue). l

NGC6822位于地球约160万光年之外，处于天琴座。它是银河系本地群的成员，于19世纪80年代初由E.E. Barnard发现。1925年，爱德温·P·哈勃使用位于威尔逊山上的新100英寸望远镜对这个星系进行了首次详细研究。1966年，当时研究生苏珊·E·凯瑟对这些底片进行了分析，至今仍是该星系最全面的研究。这张颜色图像由Travis Rector（NRAO）通过结合八张滤镜中的七张图像合成而成：U（紫色）、B（蓝色）、V（绿色）、R（橙色）、I（红色）、氢-alpha（红色）和氧[OIII]（蓝色）。

New images of NGC6822 in eight filters were taken using the National Science Foundation's Blanco 4-meter telescope at Cerro Tololo Inter-American Observatory (CTIO) near La Serena, Chile, by CTIO staff members Knut Olsen and Chris Smith. They, along with Phil Massey [PI, Lowell Observatory], Paul Hodge (Univ Washington), Shay Holmes (Lowell Obs), George Jacoby (WIYN), Nichole King (STScI), and Abi Saha (NOAO) comprise the "Local Group Galaxies Survey Team".

使用位于智利兰萨雷纳附近的 Cerro Tololo Inter-American Observatory（CTIO）的国家科学基金会4米望远镜，CTIO的工作人员 Knut Olsen 和 Chris Smith 用八种滤光片拍摄了 NGC6822 的新图像。他们与 Phil Massey [PI, Lowell Observatory]、Paul Hodge (Univ Washington)、Shay Holmes (Lowell Obs)、George Jacoby (WIYN)、Nichole King (STScI) 和 Abi Saha (NOAO) 组成了“本地群星系调查团队”。

The images were obtained as part of the NOAO Local Group Galaxies Survey, one of 13 active survey projects fostered by the National Optical Astronomy Observatory.