File:Viewing the Vermin Galaxy.jpg

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描述Viewing the Vermin Galaxy.jpg	English: The NASA/ESA Hubble Space Telescope is famous for its jaw-dropping snapshots of the cosmos. At first glance this Picture of the Week appears to be quite the opposite, showing just a blur of jagged spikes, speckled noise, and weird, clashing colours — but once you know what you are looking at, images like this one are no less breathtaking. This shows a distant galaxy — visible as the smudge to the lower right — as it begins to align with and pass behind a star sitting nearer to us within the Milky Way. This is an event known as a transit. The star is called HD 107146, and it sits at the centre of the frame. Its light has been blocked in this image to make its immediate surroundings and the faint galaxy visible — the position of the star is marked with a green circle. The concentric orange circle surrounding HD 107146 is a circumstellar disc — a disc of debris orbiting the star. In the case of HD 107146 we see the disc face-on. As this star very much resembles our Sun, it is an interesting scientific target to study: its circumstellar disc could be analogous to the asteroids in our Solar System and the Kuiper belt. A detailed study of this system is possible because of the much more distant galaxy — nicknamed the “Vermin Galaxy” by some to reflect their annoyance at its presence — as the star passes in front of it. The unusual pairing was first observed in 2004 by Hubble’s Advanced Camera for Surveys, and again in 2011 by Hubble’s Space Telescope Imaging Spectrograph. The latter image is shown here, as the Vermin Galaxy began its transit behind HD 107146. The galaxy will not be fully obscured until around 2020, but interesting science can be done even while the galaxy is only partly obscured. Light from the galaxy will pass through the star’s debris discs before reaching our telescopes, allowing us to study the properties of the light and how it changes, and thus infer the characteristics of the disc itself.
日期	2017年5月29日, 06:00:00
来源	https://www.spacetelescope.org/images/potw1722a/
作者	ESA/Hubble & NASA

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	日期/时间	缩⁠略⁠图	大小	用户	备注
当前	2017年5月29日 (一) 21:04		1,244 × 1,242（892 KB）	Huntster	Use default resolution rather than the stretched screen resolution version.
	2017年5月29日 (一) 14:16		1,280 × 1,278（495 KB）	Jmencisom	User created page with UploadWizard

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HD 107146

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提供者	ESA/Hubble & NASA
来源	ESA/Hubble
简短标题	Viewing the Vermin Galaxy
图像标题	The NASA/ESA Hubble Space Telescope is famous for its jaw-dropping snapshots of the cosmos. At first glance this Picture of the Week appears to be quite the opposite, showing just a blur of jagged spikes, speckled noise, and weird, clashing colours — but once you know what you are looking at, images like this one are no less breathtaking. This shows a distant galaxy — visible as the smudge to the lower right — as it begins to align with and pass behind a star sitting nearer to us within the Milky Way. This is an event known as a transit. The star is called HD 107146, and it sits at the centre of the frame. Its light has been blocked in this image to make its immediate surroundings and the faint galaxy visible — the position of the star is marked with a green circle. The concentric orange circle surrounding HD 107146 is a circumstellar disc — a disc of debris orbiting the star. In the case of HD 107146 we see the disc face-on. As this star very much resembles our Sun, it is an interesting scientific target to study: its circumstellar disc could be analogous to the asteroids in our Solar System and the Kuiper belt. A detailed study of this system is possible because of the much more distant galaxy — nicknamed the “Vermin Galaxy” by some to reflect their annoyance at its presence — as the star passes in front of it. The unusual pairing was first observed in 2004 by Hubble’s Advanced Camera for Surveys, and again in 2011 by Hubble’s Space Telescope Imaging Spectrograph. The latter image is shown here, as the Vermin Galaxy began its transit behind HD 107146. The galaxy will not be fully obscured until around 2020, but interesting science can be done even while the galaxy is only partly obscured. Light from the galaxy will pass through the star’s debris discs before reaching our telescopes, allowing us to study the properties of the light and how it changes, and thus infer the characteristics of the disc itself.
使用条款	Creative Commons Attribution 4.0 International License
数据生成日期时间	2017年5月29日 (一) 06:00
文件修改日期时间	2016年11月28日 (一) 11:23
数字化日期时间	2016年11月24日 (四) 14:01
元数据最后修改日期	2016年11月28日 (一) 12:23
原始文件唯一ID	xmp.did:c4ffb57f-57b6-2047-ba9e-b34a0d3db06a
关键词	Vermin Galaxy
联系信息	http://www.spacetelescope.org Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany
IIM版本	4

File:Viewing the Vermin Galaxy.jpg

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File:Viewing the Vermin Galaxy.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）

成立或创建时间

29 5 2017

数据大小 简体中文（已转写）

913,417 字节

高度

1,242 像素

宽度

1,244 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）

c02f9960d2a6bee71a6974d4c02eb6bea03e640c

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