This page describes an image Cassiopeia Constellation Map
下载文件 ( 图像 125.52 kB)
下载 PDF 文件 (PDF file 193.50 kB)
图示说明：
The constellation Cassiopeia along with its bright stars and its surrounding constellations. Cassiopeia is surrounded by (going clockwise from the top):Cepheus, Andromeda, Perseus and Camelopardalis.
Cassiopeia is a northern constellation that is visible from all of the northern hemisphere and equatorial regions of the southern hemisphere. It is most visible in the evenings in the northern hemisphere late autumn and southern hemisphere late spring.
The open star clusters M52, M103, NGC 457 and NGC 663 all lie in this constellation. These are marked with yellow circles. Two dwarf elliptical galaxies NGC 147 and NGC 185 lie in the southern part of the constellation. These are marked with red ellipses and are gravitationally bound to the larger Andromeda galaxy which lies to the south in the constellation of Andromeda.
The y-axis of this diagram is in degrees of declination with north as up and the x-axis is in hours of right ascension with east to the left. The sizes of the stars marked here relate to the star's apparent magnitude, a measure of its apparent brightness. The larger dots represent brighter stars. The Greek letters mark the brightest stars in the constellation. These are ranked by brightness with the brightest star being labeled alpha, the second brightest beta, etc., although this ordering is not always followed exactly. The dotted boundary lines mark the IAU's boundaries of the constellations and the solid green lines mark one of the common forms used to represent the figures of the constellations. Neither the constellation boundaries, nor the lines joining the stars appear on the sky.
图示来源： Adapted by the IAU Office of Astronomy for Education from the original by IAU/Sky & Telescope. 来源链接
图示翻译状态: 尚未由审核人员批准
图示授权许可： 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 图标
相关术语表词条：
仙女座
, 仙女座星系
, 天球坐标
, 拱极星
, 星座
, 疏散星团
, 矮星系
, 视星等
, 赤纬
, 赤经（RA）
分类：
肉眼天文学
如果您想翻译或修改此图表，请下载 此图表的英文 SVG 版本 (568.21 kB)。您可以使用 Inkscape（免费）或 Adobe Illustrator（商业软件）等工具进行编辑。请记得注明原作者。
或者，您可以直接下载无文字底图，通过填入文字来制作翻译版或修改版。请下载以下任一文件：
下载无文字版 PDF (PDF file 174.96 kB)
OAE 网站上展示的图示说明是由 OAE、OAE 各中心与节点、OAE 的 国家天文教育协调员 (NAEC) 和其他志愿者共同撰写、翻译与审核的。您可以在这里 查看我们翻译项目的完整致谢名单。所有媒体文件说明均遵循 Creative Commons CC BY-4.0 许可协议 进行发布，应注明来源为"IAU OAE"。媒体文件本身可能具有不同的许可协议（见上文），请根据“来源”部分注明相应来源。
如果您发现此图示或其说明中有任何错误，请联系我们。
