File:Meeting the neighbours.jpg

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摘要

描述Meeting the neighbours.jpg	English: There are many galaxies in the Universe and although there is plenty of room, they tend to stick together. The Milky Way, for example, is part of a large gathering of over fifty galaxies known as the Local Group. Galaxy groups like this come together to form even larger groups called clusters which can congregate further still to create mammoth superclusters. The sphere of space surrounding our galaxy is known as the Local Volume, a region some 35 million light-years in diameter and home to several hundred known galaxies. The subject of this new NASA/ESA Hubble Space Telescope image, a beautiful dwarf irregular galaxy known as PGC 18431, is one of these galaxies. This image shows PGC 18431 smudged across the sky, but it wasn’t imaged purely for its looks. These Hubble observations were gathered in order to probe how Local Volume galaxies cluster together and move around. Hubble’s high resolution allows astronomers to explore star populations within these moderately distant galaxies — specifically, stars known as tip of the red-giant branch stars — in order to get an idea of the galaxy’s composition and, crucially, its distance from us. Knowing galactic distances enables us to accurately map a galaxy sample in three dimensions, a method key to understanding more about our cosmic neighbours, and to dismiss perspective and line-of-sight illusions.
日期	2015年6月8日, 10:00:00
来源	http://www.spacetelescope.org/images/potw1523a/
作者	ESA/Hubble & NASA

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	日期/时间	缩⁠略⁠图	大小	用户	备注
当前	2015年6月8日 (一) 14:46		1,280 × 639（154 KB）	Jmencisom	User created page with UploadWizard

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以下其他wiki使用此文件：

ar.wikipedia.org上的用途
- مجرة غير منتظمة
de.wikipedia.org上的用途
- PGC 18431
en.wikipedia.org上的用途
- Irregular galaxy
es.wikipedia.org上的用途
- Galaxia irregular
fa.wikipedia.org上的用途
- کهکشان نامنظم
gl.wikipedia.org上的用途
- Galaxia irregular
mr.wikipedia.org上的用途
- आकारहीन दीर्घिका
my.wikipedia.org上的用途
- ပုံစံအတည်တကျမရှိ ဂလက်ဆီ
sr.wikipedia.org上的用途
- Неправилна галаксија

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提供者	ESA/Hubble & NASA
来源	ESA/Hubble
使用条款	Creative Commons Attribution 3.0 Unported license
简短标题	Meeting the neighbours
图像标题	There are many galaxies in the Universe and although there is plenty of room, they tend to stick together. The Milky Way, for example, is part of a large gathering of over fifty galaxies known as the Local Group. Galaxy groups like this come together to form even larger groups called clusters which can congregate further still to create mammoth superclusters. The sphere of space surrounding our galaxy is known as the Local Volume, a region some 35 million light-years in diameter and home to several hundred known galaxies. The subject of this new NASA/ESA Hubble Space Telescope image, a beautiful dwarf irregular galaxy known as PGC 18431, is one of these galaxies. This image shows PGC 18431 smudged across the sky, but it wasn’t imaged purely for its looks. These Hubble observations were gathered in order to probe how Local Volume galaxies cluster together and move around. Hubble’s high resolution allows astronomers to explore star populations within these moderately distant galaxies — specifically, stars known as tip of the red-giant branch stars — in order to get an idea of the galaxy’s composition and, crucially, its distance from us. Knowing galactic distances enables us to accurately map a galaxy sample in three dimensions, a method key to understanding more about our cosmic neighbours, and to dismiss perspective and line-of-sight illusions.
数据生成日期时间	2115年1月8日 (二) 10:00
使用软件	Adobe Photoshop CC 2014 (Windows)
著作权状况	著作权状况未设置
原始文件唯一ID	uuid:316633037B98E111B2A4A86086214CB0
关键词	PGC 18431
联系信息	http://www.spacetelescope.org/ Karl-Schwarzschild-Strasse 2 Garching bei M√ºnchen, , D-85748 Germany
IIM版本	4

File:Meeting the neighbours.jpg

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File:Meeting the neighbours.jpg

摘要

许可协议

说明

此文件中描述的项目

描绘内容

版权状态 简体中文（已转写）

版权所有 简体中文（已转写）

许可协议

知识共享署名4.0国际 简体中文（已转写）

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8 6 2015

数据大小 简体中文（已转写）

157,393 字节

高度

639 像素

宽度

1,280 像素

媒体类型 简体中文（已转写）

image/jpeg

校验和 简体中文（已转写）

b4ddd5a7aa846c3da0cb16c521bbea0ea9e17271

文件历史

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