Ficheiro:Caldwell 43.jpg
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DescriçãoCaldwell 43.jpg |
English: Hubble has allowed astronomers to view galaxies of all shapes and sizes from nearly every angle. When a galaxy is seen edge-on, the mesmerizing perspective reveals a dazzling slice of the universe. Caldwell 43, also known as the “Little Sombrero,” is one such galaxy.
Set against a speckled backdrop of more remote galaxies, Caldwell 43 features a bright central bulge, a thin disk full of dust, and a glowing halo of gas and stars that sprawls out into space. The Little Sombrero was first discovered by British astronomer William Herschel in 1784. The dusty spiral gets its nickname from the Sombrero galaxy (M104), which resembles a broad-rimmed Mexican hat and was discovered by the French astronomer Pierre Méchain just a few years earlier in 1781. Also viewed from its edge, the Sombrero galaxy is located just 28 million light-years away and looks larger than the Little Sombrero. In reality, they are nearly the same size. The Sombrero appears bigger because it is closer. With a magnitude of 10.5, the Little Sombrero is tougher to spot because it is farther away, at a distance of 40 million light-years from Earth. Also known as NGC 7814, the roughly 80,000-light-year-wide galaxy is billions of years old. Observers equipped with a telescope at least 7 inches in diameter will have the best luck spotting the galaxy, which resides in the constellation Pegasus. The dim, elongated galaxy is bright enough to be seen in moderately light-polluted skies. In the Northern Hemisphere, the autumn months provide the best opportunity to view Caldwell 43. In the Southern Hemisphere, look for it in the springtime. This image of Caldwell 43 is a combination of visible and infrared observations captured by Hubble’s Advanced Camera for Surveys in 2006. The observations were taken to assist astronomers in studying the galaxy’s stellar populations, and to help shed light on the evolution of this galaxy and others like it. For more information about Hubble’s observations of Caldwell 43, see: www.spacetelescope.org/images/potw1505a/ Credit: ESA/Hubble & NASA; Acknowledgment: Josh Barrington For Hubble's Caldwell catalog site and information on how to find these objects in the night sky, visit: www.nasa.gov/content/goddard/hubble-s-caldwell-catalog |
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Origem | https://www.flickr.com/photos/144614754@N02/49201143797/ |
Autor | NASA Hubble |
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Esta imagem foi originalmente carregada no Flickr por NASA Hubble em https://flickr.com/photos/144614754@N02/49201143797. Ela foi revisada em 23 de fevereiro de 2020 pelo robô FlickreviewR 2, que confirmou o licenciamento da imagem sob os termos de cc-by-2.0. |
23 de fevereiro de 2020
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Data e hora | Miniatura | Dimensões | Utilizador | Comentário | |
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atual | 20h04min de 23 de fevereiro de 2020 | 4 042 × 2 009 (4,23 MB) | Killarnee | User created page with UploadWizard |
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Metadados
Este ficheiro contém informação adicional, provavelmente adicionada a partir da câmara digital ou scanner utilizada para criar ou digitalizar a imagem. Caso o ficheiro tenha sido modificado a partir do seu estado original, alguns detalhes poderão não refletir completamente as mudanças efetuadas.
Data e hora de geração de dados | 10h00min de 2 de fevereiro de 2015 |
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Orientação | Normal |
Resolução horizontal | 72 ppp |
Resolução vertical | 72 ppp |
Software utilizado | Adobe Photoshop CC 2014 (Windows) |
Data e hora de modificação do ficheiro | 17h57min de 3 de setembro de 2014 |
Posicionamento Y e C | Centradas |
Versão Exif | 2.31 |
Data e hora de digitalização | 18h55min de 28 de agosto de 2014 |
Significado de cada componente |
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Versão de Flashpix suportada | 1 |
Espaço de cores | Cor não calibrada |
Versão IIM | 4 |
Título curto | Dancing on the edge |
Palavras-chave | NGC 7814 |
Atribuição/Fornecedor | Credit: ESA/Hubble & NASAAcknowl |
Fonte | ESA/Hubble |
Título | Galaxies can take many shapes and be oriented any way relative to us in the sky. This can make it hard to figure out their actual morphology, as a galaxy can look very different from different viewpoints. A special case is when we are lucky enough to observe a spiral galaxy directly from its edge, providing us with a spectacular view like the one seen in this picture of the week. This is NGC 7814, also known as the “Little Sombrero”. Its larger namesake the Sombrero Galaxy is another stunning example of an edge-on galaxy — in fact, the “Little Sombrero” is about the same size as its bright namesake at about 60 000 light-years across, but as it lies further away, it appears smaller in the sky. NGC 7814 has a bright central bulge and a bright halo of glowing gas extending outwards into space. The dusty spiral arms appear as dark streaks. they consist of dusty material that absorbs and blocks light from the galactic centre behind it. The field of view of this NASA/ESA Hubble Space Telescope image would be very impressive even without NGC 7814 in front; nearly all the objects seen in this image are galaxies as well. A version of this image was entered into the Hubble’s Hidden Treasures image processing competition by contestant Josh Barrington. Links Josh Barrington’s Hidden Treasures entry on Flickr |
Bits por componente |
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Altura | 2 009 px |
Largura | 4 042 px |
Composição do píxel | RGB |
Número de componentes | 3 |
Informação de contacto |
http://www.spacetelescope.org/ Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
Editora | ESA/Hubble |
Tipo do conteúdo | Observation |
Data da última modificação dos metadados | 19h57min de 3 de setembro de 2014 |
Identificação exclusiva do documento original | xmp.did:2c92fa5b-6894-094c-8ecc-8fbf283d67ad |
Condições de utilização |
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Comentário de ficheiro JPEG | Galaxies can take many shapes and be oriented any way relative to us in the sky. This can make it hard to figure out their actual morphology, as a galaxy can look very different from different viewpoints. A special case is when we are lucky enough to observe a spiral galaxy directly from its edge, providing us with a spectacular view like the one seen in this picture of the week. This is NGC 7814, also known as the “Little Sombrero”. Its larger namesake the Sombrero Galaxy is another stunning example of an edge-on galaxy — in fact, the “Little Sombrero” is about the same size as its bright namesake at about 60 000 light-years across, but as it lies further away, it appears smaller in the sky. NGC 7814 has a bright central bulge and a bright halo of glowing gas extending outwards into space. The dusty spiral arms appear as dark streaks. they consist of dusty material that absorbs and blocks light from the galactic centre behind it. The field of view of this NASA/ESA Hubble Space Telescope image would be very impressive even without NGC 7814 in front; nearly all the objects seen in this image are galaxies as well. A version of this image was entered into the Hubble’s Hidden Treasures image processing competition by contestant Josh Barrington. Links Josh Barrington’s Hidden Treasures entry on Flickr |