File:NGC1755 - HST - Potw2151a.jpg

原始文件 (4,421 × 3,123像素,文件大小:3.79 MB,MIME类型:image/jpeg


摘要

描述
English: A Sprinkling of Stars

The open star cluster NGC 1755 resembles a pinch of salt strewn on a jet-black tablecloth in this image from the NASA/ESA Hubble Space Telescope. This collection of stars resides in one the Milky Way’s near neighbours — the Large Magellanic Cloud — and measures 120 light-years from side to side. Despite this impressive breadth, NGC 1755 is a member of the smaller class of star clusters. Star clusters are gravitationally bound collections of stars, and come in two main varieties — smaller open clusters like NGC 1755, which are hosts to younger stars, and gargantuan globular clusters, which can contain millions of older stars.

Hubble gazed into the heart of NGC 1755 in order to better understand how different populations of stars can co-exist in a single cluster. A population of stars is a group of stars with similar properties such as age or chemical composition, and these populations provide astronomers with valuable insights into the births, lives, and deaths of stars. Clusters in the Magellanic Clouds are particularly useful natural laboratories thanks to the Clouds’ proximity to the Milky Way. Hubbles’s eagle-eyed vision was a vital asset when observing NGC 1755 — with so many stars packed into a small area of sky, Hubble’s high-resolution Advanced Camera for Surveys and Wide Field Camera 3 allowed individual stars in the cluster to be distinguished.

Credit:

ESA/Hubble & NASA, A. Milone, G. Gilmore


Coordinates
Position (RA):  	4 55 15.25
Position (Dec):	-68° 12' 18.71"
Field of view:  	2.92 x 2.06 arcminutes
Orientation:    	North is 115.6° left of vertical

Colours & filters Band	Wavelength	Telescope
Optical U       	336 nm    	Hubble Space Telescope WFC3
Optical I       	814 nm   	Hubble Space Telescope WFC3
Optical U       	336 nm   	Hubble Space Telescope WFC3
Optical V       	555 nm   	Hubble Space Telescope ACS
Optical I       	814 nm   	Hubble Space Telescope WFC3
.
日期 20 December 2021, 06:00 (released)
来源 https://esahubble.org/images/potw2151a/
作者 ESA/Hubble & NASA, A. Milone, G. Gilmore

许可协议

w:zh:知识共享
署名
署名
ESA/Hubble images, videos and web texts are released by the ESA under the Creative Commons Attribution 4.0 International license and may on a non-exclusive basis be reproduced without fee provided they are clearly and visibly credited. Detailed conditions are below; see the ESA copyright statement for full information. For images created by NASA or on the hubblesite.org website, or for ESA/Hubble images on the esahubble.org site before 2009, use the {{PD-Hubble}} tag.
Conditions:
  • The full image or footage credit must be presented in a clear and readable manner to all users, with the wording unaltered (for example: "ESA/Hubble"). Web texts should be credited to ESA/Hubble (except when used by media). The credit should not be hidden or disassociated from the image footage. Links should be active if the credit is online. See the usage rights Q&A section on the ESA copyright page for guidance.
  • ESA/Hubble materials may not be used to state or imply the endorsement by ESA/Hubble or any ESA/Hubble employee of a commercial product or service.
  • ESA/Hubble requests a copy of the product sent to them to be indexed in their archive.
  • If an image shows an identifiable person, using that image for commercial purposes may infringe that person's right of privacy, and separate permission should be obtained from the individual.
  • If images or visuals are changed significantly from the original work (apart from resizing, cropping), we suggest that the changes are mentioned after the credit line. For example "Original image by ESA/Hubble (M. Kornmesser), warping and recolouring by NN".

Notes:

  • Note that this general permission does not extend to the use of ESA/Hubble's logo, which shall remain protected and may not be used or reproduced without prior and individual written consent of ESA/Hubble.
  • Also note that music, scientific papers and code on the esahubble.org site are not released under this license and can not be used for non-ESA/Hubble products.
  • By reproducing ESA/Hubble material, in part or in full, the user acknowledges the terms on which such use is permitted.
w:zh:知识共享
署名
本文件采用知识共享署名 4.0 国际许可协议授权。
署名: ESA/Hubble & NASA, A. Milone, G. Gilmore
您可以自由地:
  • 共享 – 复制、发行并传播本作品
  • 修改 – 改编作品
惟须遵守下列条件:
  • 署名 – 您必须对作品进行署名,提供授权条款的链接,并说明是否对原始内容进行了更改。您可以用任何合理的方式来署名,但不得以任何方式表明许可人认可您或您的使用。

说明

添加一行文字以描述该文件所表现的内容

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)

知识共享署名4.0国际 简体中文(已转写)

媒体类型 简体中文(已转写)

image/jpeg

文件历史

点击某个日期/时间查看对应时刻的文件。

日期/时间缩⁠略⁠图大小用户备注
当前2021年12月20日 (一) 09:262021年12月20日 (一) 09:26版本的缩略图4,421 × 3,123(3.79 MB)Fabian RRRR{{delete|reason=This file was initially tagged by AntiCompositeBot as '''no license''' (User:AntiCompositeBot/NoLicense/tag)|subpage=File:NGC3568 - HST - Potw2150a.jpg|year=2021|month=December|day=13}} == {{int:filedesc}} == {{Information |description={{en|1=''A Sprinkling of Stars The open star cluster NGC 1755 resembles a pinch of salt strewn on a jet-black tablecloth in this image from the NASA/ESA Hubble Space Telescope. This collection of stars resides in one t...

以下页面使用本文件:

全域文件用途

以下其他wiki使用此文件:

元数据