{"id":11426,"date":"2015-09-24T11:41:03","date_gmt":"2015-09-24T15:41:03","guid":{"rendered":"http:\/\/hobbyspace.com\/Blog\/?p=11426"},"modified":"2015-09-24T11:41:03","modified_gmt":"2015-09-24T15:41:03","slug":"esahubble-new-images-of-veil-nebula-show-expansion-since-1997","status":"publish","type":"post","link":"https:\/\/hobbyspace.com\/Blog\/?p=11426","title":{"rendered":"ESA\/Hubble: New images of Veil Nebula show expansion since 1997"},"content":{"rendered":"

Via\u00a0ESA Hubble<\/a>\u00a0comes some beautiful new Hubble Telescope images of the Veil Nebula:<\/p>\n

Revisiting the Veil Nebula<\/a><\/strong><\/p>\n

The NASA\/ESA Hubble Space Telescope imaged three magnificent sections of the Veil Nebula in 1997. Now, a stunning new set of images from Hubble\u2019s Wide Field Camera 3 capture these scattered stellar remains in spectacular new detail and reveal its expansion over the last years.<\/p>\n

\"This<\/a>
This image shows a small section of the Veil Nebula, as it was observed by the NASA\/ESA Hubble Space Telescope. This section of the outer shell of the famous supernova remnant is in a region known as NGC 6960 or \u2014 more colloquially \u2014 the Witch\u2019s Broom Nebula.<\/figcaption><\/figure>\n

Deriving its name from its delicate, draped filamentary structures, the beautiful Veil Nebula is one of the best-known supernova remnants<\/a>. It formed from the violent death of a star twenty times the mass of the Sun that exploded about 8000 years ago. Located roughly 2100 light-years from Earth in the constellation of Cygnus<\/a> (The Swan), this brightly coloured cloud of glowing debris spans approximately 110 light-years.<\/p>\n

\"This<\/a>
This image shows the Veil supernova remnant and the surrounding sky. Due to the size of the Nebula the NASA\/ESA Hubble Space Telescope was able to only observe a small part of it in detail.<\/figcaption><\/figure>\n

In 1997, Hubble\u2019s Wide Field and Planetary Camera 2<\/a> (WFPC2) photographed the Veil Nebula, providing detailed views of its structure. Now, overlaying WFPC2 images with new Wide Field Camera 3<\/a> (WFC3) data provides even greater detail and allows scientists to study how far the nebula has expanded since it was photographed over 18 years ago.<\/p>\n

Despite the nebula\u2019s complexity and distance from us, the movement of some of its delicate structures is clearly visible \u2014 particularly the faint red hydrogen filaments. In this image, one such filament can be seen as it meanders through the middle of the brighter features that dominate the image.<\/p>\n

\"Using<\/a>
Using red-blue glasses this image allows to see the Veil Nebula in 3D.<\/figcaption><\/figure>\n

Astronomers suspect that before the Veil Nebula\u2019s source star exploded it expelled a strong stellar wind. This wind blew a large cavity into the surrounding interstellar gas. As the shock wave from the supernova expands outwards, it encounters the walls of this cavity \u2014 and forms the nebula\u2019s distinctive structures. Bright filaments are produced as the shock wave interacts with a relatively dense cavity wall, whilst fainter structures are generated by regions nearly devoid of material. The Veil Nebula\u2019s colourful appearance is generated by variations in the temperatures and densities of the chemical elements present.<\/p>\n

http:\/\/cdn.spacetelescope.org\/archives\/videos\/medium_podcast\/heic1520a.m4v<\/a><\/video><\/div>\n

This video begins with a ground-based view of the night sky, before zooming in on the Veil Nebula, a supernova remnant, as the NASA\/ESA Hubble Space Telescope sees it.\u00a0Credit:\u00a0ESA\/Hubble, Digitized Sky Survey, Nick Risinger (skysurvey.org<\/a>),\u00a0Music: Johan Monell<\/a><\/em><\/p>\n

The blue coloured features \u2014 outlining the cavity wall \u2014 appear smooth and curved in comparison to the fluffy green and red coloured ones. This is because the gas traced by the blue filter has more recently encountered the nebula\u2019s shock wave, thus still maintain the original shape of the shock front. These features also contain hotter gas than the red and green coloured ones [1]<\/a>. The latter excited longer ago and have subsequently diffused into more chaotic structures.<\/p>\n

Hidden amongst these bright, chaotic structures lie a few thin, sharply edged, red coloured filaments. These faint hydrogen emission features are created through a totally different mechanism than that which generates their fluffy red companions, and they provide scientists with a snapshot of the shock front. The red colour arises after gas is swept into the shock wave \u2014 which is moving at almost 1.5 million kilometres per hour! \u2014 and the hydrogen within the gas is excited by particle collisions right at the shock front itself.<\/p>\n

http:\/\/cdn.spacetelescope.org\/archives\/videos\/medium_podcast\/heic1520b.m4v<\/a><\/video><\/div>\n

This video pans over NASA\/ESA Hubble Space Telescope observations of the Veil Nebula. The features of the nebula, shown in different colours, are caused by the shockwave of the dying star and the interstellar gas it was surrounded by.\u00a0Credit:\u00a0NASA, ESA, Hubble Heritage Team,\u00a0Music: Johan Monell<\/a><\/em><\/p>\n

Despite utilising six full Hubble fields of view, these new WFC3 images cover just a tiny fraction of the nebula\u2019s outer limb. Located on the west side of the supernova remnant, this section of the outer shell is in a region known as NGC 6960<\/a> or \u2014 more colloquially \u2014 the Witch\u2019s Broom Nebula.<\/p>\n

http:\/\/cdn.spacetelescope.org\/archives\/videos\/medium_podcast\/heic1520c.m4v<\/a><\/video><\/div>\n

This video shows the movement of the gas filaments within the Veil Nebula in comparing the observations made in 2015 with observations from 1997<\/a>. The expansion of the gas in comparison to the background stars are clearly visible.\u00a0Credit:\u00a0NASA, ESA; Hubble Heritage Team.\u00a0Acknowledgment: J. Hester (Arizona State University)<\/em><\/p>\n

Notes<\/strong><\/p>\n

<\/a>[1] The colours in the image have been chosen to help identifying the three different species of gas; they do not represent the real colours of the nebula.<\/p>\n","protected":false},"excerpt":{"rendered":"

Via\u00a0ESA Hubble\u00a0comes some beautiful new Hubble Telescope images of the Veil Nebula: Revisiting the Veil Nebula The NASA\/ESA Hubble Space Telescope imaged three magnificent sections of the Veil Nebula in 1997. Now, a stunning new set of images from Hubble\u2019s Wide Field Camera 3 capture these scattered stellar remains in spectacular new detail and reveal … Continue reading ESA\/Hubble: New images of Veil Nebula show expansion since 1997<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[12],"tags":[],"class_list":["post-11426","post","type-post","status-publish","format-standard","hentry","category-astronomy"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p34aWK-2Yi","jetpack-related-posts":[{"id":12527,"url":"https:\/\/hobbyspace.com\/Blog\/?p=12527","url_meta":{"origin":11426,"position":0},"title":"Hubble captures marvelous view of the Bubble Nebula to celebrate 26 years in orbit","author":"TopSpacer","date":"April 21, 2016","format":false,"excerpt":"ESA\/Hubble\u00a0celebrates 26 years in orbit with a wonderful new image of the\u00a0Bubble Nebula. 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