View allAll Photos Tagged zeza

...para vós, amigos!!!!!!!!!:)

...for you, friends !!!!!!!!!:)

Exelente persona y siempre tan atenta con Alicia y conmigo!!!!! Gracias amiga!!!! Gracias por estar.

View On Black

 

Parecem de cera, como disse a minha amiga Zéza Lemos www.flickr.com/photos/zezafsrm/ .

Flowers of Phytolacca americana

Chivitz-Minhau-Nove-Zezão

[polska wersja niżej]

 

I must say I love this photo a lot. It's a combination of the moment, composition, my feelings at that time, everything. Anyway it's in the box named "top shots" :)

The passenger train no. 77427 from Gdynia Główna to Chojnice has left Rytel Wieś passenger stop and it will soon arrive at Rytel station. In this moment the train is passing near a nice old Prussian brick building of the railway watchtower. On the head is one of Chojnice depot's flagship ships: "gagarin" ST44-1102 (this is the loco that had a "squint" created from different placement of tailights on one front; it's not this front on the picture). The consist is not typical here, these were the first years with the appearance of 1st class wagons as replacements for the 2nd class, so in this train we can see 4 out of 5 of the wagons are of 1st class, and I really don't remember if even one of them was the real first class. August 12 ,2003.

Around the northern borders of Bory Tucholskie, a few kilometers south of this place, exactly 14 years later (August 11/12, 2017) the greatest disaster in the history of the State Forests took place, i.e. a hurricane that devastated this area, and destroyed many houses and hundreds of hectares of forest.

Photo by Jarek / Chester

 

Pociąg osobowy nr77427 z Gdyni Głównej do Chojnic, powoli zmierza do końca podróży, po opuszczeniu przystanku osobowego Rytel Wieś niedługo zamelduje się na stacji w Rytlu. Aktualnie mija ładny stary pruski ceglany budynek strażnicy kolejowej. A na czele jeden z flagowych okrętów chojnickiej lokomotywowni, gagarin 1102 (to jest ten, który ma z jednej strony "zeza" z końcówek, akurat na zdjęciu jedzie stroną prawilną). Skład nie do końca typowy, były to pierwsze lata z pojawieniem się wagonów 1 klasy jako zastępczych za klasę drugą, w tym pociągu aż 80% wagonów jest klasy 1, a ja nie pamiętam, czy chociaż jeden z nich jest formalnie pierwszą klasą.

Wokół północne rubieże Borów Tucholskich. Gdzieś w tej okolicy, kilka kilometrów na południe od tego miejsca dokładnie 14 lat później (11/12 sierpnia 2017 roku) wydarzył się największy kataklizm w historii Lasów Państwowych, czyli nawałnica, która spustoszyła okolicę, zniszczyła wiele domów i setki hektarów lasu. Zdjęcie z 12 sierpnia 2003 roku.

Fot. Jarek / Chester

 

lá na choque cultural - vale a pena conferir...

é com imensa satisfação que convido todos para o lançamento oficial na Fnac, do primeiro volume da coleção "Estética Marginal", livro produzido por mim Victor Moriyama e pelo fotógrafo Felipe Lopez (www.flickr.com/f_lopez). O Livro é fruto de muitos anos de trabalho, e coroa o atual momento do graffiti paulsitano, ao retratar alguns artistas da segunda geração do garffiti paulistano:

Akeni, Prozak, Highraff, Boleta, Chivitz, Nunca, Nove, Paulo Ito, Zézão, Titi Freak.

 

Entrada gratuita na FNAC 13/10, com coquetéis, a partir das 19 horas...

 

só chegar!

Invite no more than 6 groups to please!

Thanks!:)

 

Não convidem para mais de 6 grupos por favor!

Obrigada!:)

FLOP + PEIXE

 

Quando o Zezão veio visitar Belorihills!

Volte sempre queridão! Saudades! O pão de queijo já tá te esperando!

www.flickr.com/zezao

 

Eu + fishy = www.flickr.com/photos/raquelschembri/1518924046/

 

E tem essa foto também, a.Z.(antes do Zezão)

Dá uma olhada!

www.flickr.com/photos/raquelschembri/1518748504/in/set-72...

... Foi o que restou da minha galeria... por opção...

Estou a precisar de inovar!:)

Um abraço a todos e obrigada!!!!!!!!!!

 

. That's what's left of my gallery, by choice ...

I'm in need of innovation:)

Hug to everyone and thank you !!!!!!!!!!

 

www.youtube.com/watch?v=c6SW5wa9RIg&feature=related

Passou onte no metrópole (TV cultura)

 

Parabens Zezão!

 

bjs e boa quarta a todos

Felicitaciones a nosotros por mas un maravlloso concurso!!!:))))

 

Gracias de corazón a todos que han votado em mi foto!:)

 

Si tengo que ser yo a elegir el nuevo tema propongo,"Una flor para arribalapepi"!:)

Lo hago, porque para mí no podía ser otro; es lo que ciento!!! Todo lo que Pepi hace, es perfecto!!!:)

 

Gracias tambien a Elza una persona linda por dentro e por fuera, asi como lo es Ryyta!:)

 

Un abrazo para todos!:)

 

Entoces la va mi foto.

  

Zéza

Celeste y Blanco

Sussy

gatercero

Elza

Janaina

Jacilluch

negracha

lacha2008

Blanca Rosa

Andrés Perez

Isabelita

Ryta

Heradia

Juan Carlos

Bad Alley

Neusí

Rafischatz

Edith

SMoon

Flores do meu jardin

 

fotospepi.blogspot.com/2009/07/el-concurso-de-zeza.html

 

Diorama "Rua do Comércio"

Escala 1:43

Feito entre 2020 e 2021

© All Rights Reserved.

 

Pasan los años,

y cómo cambia lo que yo siento;

lo que ayer era amor

se va volviendo otro sentimiento.

Porque años atrás

tomar tu mano, robarte un beso,

sin forzar un momento

formaban parte de una verdad.......

Diorama "Rua do Comércio"

Escala 1:43

Feito entre 2020 e 2021

...

 

Durante a minha viagem ao sul do país no mes de outubro para o evento em que produzi junto com a Hang Loose, tive o prazer ou a sorte de encontrar essa bóia nautica que estava encalhada as margens de uma praia deserta a qual não vou lembrar o nome agora.

 

Com certeza essa foi a primeira vez em que pinto em um lugar totalmente inusitado.

Alem de ter sido um suporte irado e todo enferrujado, eu tive o prazer de pintar descalço e em contato direto com o mar.

Pra mim esse dia será inesquecivel e a fotografia será essa recordação eterna desse pico paradisíaco.

 

Pra quem não viu ou ficou sabendo do evento que produzi para o campeonato mundial do WCT Hang Loose, vou deixar os links para quem quiser confeirir toda a minha programação visual do evento, troféus, etc.

 

www.flickr.com/photos/zezao/3024475817/

 

www.flickr.com/photos/zezao/3024481627/in/photostream/

 

www.flickr.com/photos/zezao/3024493343/in/photostream/

 

www.flickr.com/photos/zezao/3025335402/in/photostream/

 

www.flickr.com/photos/zezao/3024526175/in/photostream/

  

This photo is dedicated to my flickr friend Maria (Zéza Lemos) from my heart

This composite NASA image of the spiral galaxy M81, located about 12 million light years away, includes X-ray data from the Chandra X-ray Observatory (blue), optical data from the Hubble Space Telescope (green), infrared data from the Spitzer Space Telescope (pink) and ultraviolet data from GALEX (purple). The inset shows a close-up of the Chandra image. At the center of M81 is a supermassive black hole that is about 70 million times more massive than the Sun.

 

A new study using data from Chandra and ground-based telescopes, combined with detailed theoretical models, shows that the supermassive black hole in M81 feeds just like stellar mass black holes, with masses of only about ten times that of the Sun. This discovery supports the implication of Einstein's relativity theory that black holes of all sizes have similar properties, and will be useful for predicting the properties of a conjectured new class of black holes.

 

Image Credit: X-ray: NASA/CXC/Wisconsin/D.Pooley and CfA/A.Zezas; Optical: NASA/ESA/CfA/A.Zezas; UV: NASA/JPL-Caltech/CfA/J.Huchra et al.; IR: NASA/JPL-Caltech/CfA

 

Learn more/access larger images:

www.nasa.gov/mission_pages/chandra/multimedia/photos08-07...

 

p.s. You can see all of our Chandra photos in the Chandra Group in Flickr at: www.flickr.com/groups/chandranasa/ We'd love to have you as a member!

This is probably a juvenile European Goldfinch, trying to turn into adulthood. It is feeding off thistle seed pods and its bad table manner is strewing the cotton into the wind.

 

After going through the whole thistle pod, it is moving on to another thistle. Here it appears to be expressing a hint of guilt after having made a mess ...

 

This image is included in 3 galleries :- 1) "Grandes talentos !!!" curated by Zeza Lemos, 2) "les oiseaux du monde 2" by raz1940 et Charlotte and 3) "Birds 5" by Grisu.

Scientists have used Chandra to make a detailed study of an enormous cloud of hot gas enveloping two large, colliding galaxies. This unusually large reservoir of gas contains as much mass as 10 billion Suns, spans about 300,000 light years, and radiates at a temperature of more than 7 million degrees.

 

This giant gas cloud, which scientists call a "halo," is located in the system called NGC 6240. Astronomers have long known that NGC 6240 is the site of the merger of two large spiral galaxies similar in size to our own Milky Way. Each galaxy contains a supermassive black hole at its center. The black holes are spiraling toward one another, and may eventually merge to form a larger black hole.

 

Another consequence of the collision between the galaxies is that the gas contained in each individual galaxy has been violently stirred up. This caused a baby boom of new stars that has lasted for at least 200 million years. During this burst of stellar birth, some of the most massive stars raced through their evolution and exploded relatively quickly as supernovas.

 

The scientists involved with this study argue that this rush of supernova explosions dispersed relatively high amounts of important elements such as oxygen, neon, magnesium, and silicon into the hot gas of the newly combined galaxies. According to the researchers, the data suggest that this enriched gas has slowly expanded into and mixed with cooler gas that was already there.

 

During the extended baby boom, shorter bursts of star formation have occurred. For example, the most recent burst of star formation lasted for about five million years and occurred about 20 million years ago in Earth’s timeframe. However, the authors do not think that the hot gas was produced just by this shorter burst.

 

What does the future hold for observations of NGC 6240? Most likely the two spiral galaxies will form one young elliptical galaxy over the course of millions of years. It is unclear, however, how much of the hot gas can be retained by this newly formed galaxy, rather than lost to surrounding space. Regardless, the collision offers the opportunity to witness a relatively nearby version of an event that was common in the early Universe when galaxies were much closer together and merged more often.

 

In this new composite image of NGC 6240, the X-rays from Chandra that reveal the hot gas cloud are colored purple. These data have been combined with optical data from the Hubble Space Telescope, which shows long tidal tails from the merging galaxies, extending to the right and bottom of the image.

 

A paper describing these new results on NGC 6240 is available online and appeared in the March 10, 2013 issue of The Astrophysical Journal. The authors in this study were Emanuele Nardini (Harvard-Smithsonian Center for Astrophysics, or CfA, Cambridge, MA and currently at Keele University, UK), Junfeng Wang (CfA and currently at Northwestern University, Evanston, IL), Pepi Fabbiano (CfA), Martin Elvis (CfA), Silvia Pellegrini (University of Bologna, Italy), Guido Risalti (INAF-Osservatorio Astrofisico di Arcetri, Italy and CfA), Margarita Karovska (CfA), and Andreas Zezas (University of Crete, Greece and CfA).

 

NASA's Marshall Space Flight Center in Huntsville, Ala., manages the Chandra program for NASA's Science Mission Directorate in Washington. The Smithsonian Astrophysical Observatory controls Chandra's science and flight operations from Cambridge, Mass.

 

Read entire caption/view more images: www.chandra.harvard.edu/photo/2013/ngc6240/

 

Image credit: X-ray: NASA/CXC/SAO/E. Nardini et al; Optical: NASA/STScI

 

Caption credit: Harvard-Smithsonian Center for Astrophysics

 

Read more about Chandra:

www.nasa.gov/chandra

 

p.s. You can see all of our Chandra photos in the Chandra Group in Flickr at: www.flickr.com/groups/chandranasa/ We'd love to have you as a member!

  

_____________________________________________

These official NASA photographs are being made available for publication by news organizations and/or for personal use printing by the subject(s) of the photographs. The photographs may not be used in materials, advertisements, products, or promotions that in any way suggest approval or endorsement by NASA. All Images used must be credited. For information on usage rights please visit: www.nasa.gov/audience/formedia/features/MP_Photo_Guidelin...

Diorama "Rua do Comércio"

Escala 1:43

Feito entre 2020 e 2021

The Chandra image from 2003 of the elliptical galaxy NGC 4261 reveals dozens of black holes and neutron stars strung out across tens of thousands of light years like beads on a necklace. The spectacular structure, which is not apparent from the optical image of the galaxy, is thought to be the remains of a collision between galaxies a few billion years ago.

 

According to this interpretation, a smaller galaxy was captured and pulled apart by the gravitational tidal forces of NGC 4261. As the doomed galaxy fell into the larger galaxy, large streams of gas were pulled out into long tidal tails. Shock waves in these tidal tails triggered the formation of many massive stars.

 

Over the course of a few million years, these stars evolved into neutron stars or black holes. A few of these collapsed stars had companion stars, and became bright X-ray sources as gas from the companions was captured by their intense gravitational fields.

 

The currently favored view is that elliptical galaxies are produced by collisions between spiral galaxies. Computer simulations of galaxy collisions support this idea, and optical evidence of tails, shells, ripples, arcs and other structures have been interpreted as evidence for this theory.

 

However as the image shows, the optical evidence rather quickly fades into the starry background of the galaxy, whereas the X-ray signature lingers for hundreds of millions of years. Chandra's image of NGC 4261 shows that X-ray observations may be the best way to identify the ancient remains of mergers between galaxies.

 

Credit: X-ray: NASA/CXC/A. Zezas et al.; Optical: Pal.Obs. DSS

 

Read more

 

More about the Chandra X-ray Observatory

 

NASA Media Usage Guidelines

#Krashkraft

#Krashkraft

Ps. English version just below

 

Localizada na constelação do Escultor, a galáxia IC5332 ou PGC 71775, é uma linda galáxia espiral simétrica extremamente tênue distante 39 milhões de anos-luz[1]. É uma galáxia espiral do tipo SA(s)d [3] que possui uma baixa taxa de formação estelar sendo assim considerada como uma galáxia estável sem explosão estelar (non-starbust)[2]. Possui uma magnitude aparente de 10.72 com um brilho superficial bastante baixo na ordem de 23.8 magnitude/arcosegundos^1/2 o que exige um céu escuro e muito tempo de exposição na astrofotografia para que seja registrada[1].

 

Referências:

[1] Wikipedia - en.wikipedia.org/wiki/IC_5332

[2] A Mini-survey of X-ray Point Sources in Starburst and Non-Starburst Galaxies - R. E. Kilgard, P. Kaaret, M. I. Krauss, A. H. Prestwich, M. T. Raley, A. Zezas, 2002 - arxiv.org/abs/astro-ph/0203190

[3] ned.ipac.caltech.edu/cgi-bin/objsearch?objname=IC+5332&am...

 

Registrei esta imagem em 08, 09 e 10 de julho de 2021 na zona rural de Munhoz - MG. Local com escala de Bortle 4.

 

Dados técnicos:

Gain: 139, Offset: 10, temperatura da câmera: -15°C, exposição total de 8h57m. Calibração por darks, flats e dark flats.

 

Filtros

Luminância: 72 x 300s / Bin 1x1

Vermelho: 20 x 180s / Bin 1x1

Verde: 20 x 180s / Bin 1x1

Azul: 19 x 180s / Bin 1x1

 

Equipamento:

- Montagem Equatorial Orion Atlas EQ-G

- Telescópio GSO Ritchey-Chretien 8" F8 Fibra de Carbono

- Câmera ZWO ASI1600MM Cooled

- Redutor focal Astro-Physics 67 CCDT

- Auto guiagem com câmera ZWO ASI120MM em OAG

- Roda de Filtros ZWO 8 posições

- Filtros Optolong 1,25" Luminance, Red, Green, Blue

 

Softwares

- Captura: N.I.N.A 1.10

- Processamento: PixInsight 1.8 e Adobe Photoshop CS5

- Guiagem: PHD2

- Controle: Green Swamp Software e Cartes du Ciel

 

-----------------------------------

 

Located in the constellation of the Sculptor, galaxy IC5332 or PGC 71775, it is a beautiful, extremely faint symmetrical spiral galaxy away 39 million light-years[1]. It is a spiral galaxy of the SA(s)d [3] type that has a low rate of star formation and is therefore considered a stable galaxy non-starbust[2]. It has an apparent magnitude of 10.72 with a very low surface brightness on the order of 23.8 magnitude/square arc sec which requires a dark sky and a lot of exposure in astrophotography[1].

 

References:

[1] Wikipedia - en.wikipedia.org/wiki/IC_5332

[2] A Mini-survey of X-ray Point Sources in Starburst and Non-Starburst Galaxies - R. E. Kilgard, P. Kaaret, M. I. Krauss, A. H. Prestwich, M. T. Raley, A. Zezas, 2002 - arxiv.org/abs/astro-ph/0203190

[3] ned.ipac.caltech.edu/cgi-bin/objsearch?objname=IC+5332&am...

 

This image was captured at 8th, 9th and 10th July 2021 in rural zone of Munhoz - Minas Gerais - Brazil. Bortle Scale 4.

 

Technical data:

Gain 139, offset 10, Bin 1x1, sensor's temperature -15°C, total exposition of 8h57m. Calibration with darks, flats and darks flats.

 

Filters:

Luminance 72 x 300s

Red 20 x 180s

Green 20 x 180s

Blue 19 x 180s

 

Equipments:

- Equatorial Mount Orion Atlas EQ-G

- GSO Ritchey-Chretien Telescope 8" F8 Carbon Fiber

- ZWO ASI1600MM Cooled

- Focal reducer Astro-Physics 67 CCDT

- Guided with ZWO ASI120MM using OAG

- ZWO Filter Wheel (8 x 1.25")

- Filter Optolong 1.25" Luminance

- Filter Optolong 1,25" Red

- Filter Optolong 1,25" Green

- Filter Optolong 1,25" Blue

 

Softwares:

- Capture: N.I.N.A 1.10

- Processing: PixInsight 1.8 and Adobe Photoshop CS5

- Guiding: PHD2

- Control: Green Swamp Software and Cartes du Ciel

In this holiday season of home cooking and carefully-honed recipes, some astronomers are asking: what is the best mix of ingredients for stars to make the largest number of plump black holes?

 

They are tackling this problem by studying the number of black holes in galaxies with different compositions. One of these galaxies, the ring galaxy NGC 922, is seen in this composite image containing X-rays from NASA's Chandra X-ray Observatory (red) and optical data from the Hubble Space Telescope (pink, yellow and blue).

 

NGC 922 was formed by the collision between two galaxies – one seen in this image and another located outside the field of view. This collision triggered the formation of new stars in the shape of a ring. Some of these were massive stars that evolved and collapsed to form black holes.

 

Most of the bright X-ray sources in Chandra's image of NGC 922 are black holes pulling material in from the winds of massive companion stars. Seven of these are what astronomers classify as "ultraluminous X-ray sources" (ULXs). These are thought to contain stellar-mass black holes that are at least ten times more massive than the sun, which places them in the upper range for this class of black hole. They are a different class from the supermassive black holes found at the centers of galaxies, which are millions to billions of times the mass of the sun.

 

Theoretical work suggests that the most massive stellar-mass black holes should form in environments containing a relatively small fraction of elements heavier than hydrogen and helium, called “metals” by astronomers. In massive stars, the processes that drive matter away from the stars in stellar winds work less efficiently if the fraction of metals is smaller. Thus, stars with fewer of these metals among their ingredients should lose less of their mass through winds as they evolve. A consequence of this reduced mass loss is that a larger proportion of massive stars will collapse to form black holes when their nuclear fuel is exhausted. This theory appeared to be supported by the detection of a large number (12) of ULXs in the Cartwheel galaxy, where stars typically contain only about 30% of the metals found in the sun.

 

To test this theory, scientists studied NGC 922, which contains about the same fraction of metals as the sun, meaning that this galaxy is about three times richer in metals than the Cartwheel galaxy. Perhaps surprisingly, the number of ULXs found in NGC 922 is comparable to the number seen in the Cartwheel galaxy. Rather, the ULX tally appears to depend only on the rate at which stars are forming in the two galaxies, not on the fraction of metals they contain.

 

One explanation for these results is that the theory predicting the most massive stellar-mass black holes should form in metal poor conditions is incorrect. Another explanation is that the metal fraction in the Cartwheel galaxy is not low enough to have a clear effect on the production of unusually massive stellar-mass black holes, and therefore will not cause an enhancement in the number of ULXs. Recent models incorporating the evolution of stars suggest that a clear enhancement in the number of ULXs might only be seen when the metal fraction falls below about 15% of the Sun's value. Astronomers are investigating this possibility by observing galaxies with extremely low metal fractions using Chandra. The number of ULXs is being compared with the number found in galaxies with higher metal content. The results of this work will be published in a future paper.

 

A paper describing the results for NGC 922 was published in the March 10, 2012 issue of the Astrophysical Journal. The authors were Andrea Prestwich and Jose Luis Galache of the Harvard-Smithsonian Center for Astrophysics (CfA) in Cambridge, MA; Tim Linden from University of Santa Cruz in Santa Cruz, CA; Vicky Kalogera from Northwestern University in Evanston, IL; Andreas Zezas from CfA and University of Crete in Crete, Greece; Tim Roberts from University of Durham in Durham, UK; Roy Kilgard from Wesleyan University in Middletown, CT; Anna Wolter and Ginevra Trinchieri from INAF in Milano, Italy. NASA's Marshall Space Flight Center in Huntsville, Ala., manages the Chandra program for NASA's Science Mission Directorate in Washington. The Smithsonian Astrophysical Observatory controls Chandra's science and flight operations from Cambridge, Mass.

 

Read entire caption/view more images: chandra.harvard.edu/photo/2012/ngc922/

 

Image credit: X-ray (NASA/CXC/SAO/A.Prestwich et al); Optical (NASA/STScI)

 

Caption credit: Harvard-Smithsonian Center for Astrophysics

 

Read more about Chandra:

www.nasa.gov/chandra

 

p.s. You can see all of our Chandra photos in the Chandra Group in Flickr at: www.flickr.com/groups/chandranasa/ We'd love to have you as a member!

  

_____________________________________________

These official NASA photographs are being made available for publication by news organizations and/or for personal use printing by the subject(s) of the photographs. The photographs may not be used in materials, advertisements, products, or promotions that in any way suggest approval or endorsement by NASA. All Images used must be credited. For information on usage rights please visit: www.nasa.gov/audience/formedia/features/MP_Photo_Guidelin...

Foto tirada a bordo do navio Empress

View On Black

 

Obrigada Zéza Lemos( www.flickr.com/photos/zezafsrm/) por esta belíssima canção

www.youtube.com/watch?v=24ctEW_SQDw

   

#Krashkraft

Dedico estas fotos à Zéza Lemos, que estava comigo quando as tirei, e que me deve ter trazido sorte, porque, tanto quanto sei, este é o primeiro registo fotográfico de uma lontra na Quinta do Lago:)))

 

Apareceu por três vezes, mas mergulhava logo de seguida! Da primeira vez só vi um dorso enorme a aparecer à superfície e a mergulhar, e disse à Zéza: Aquilo não é um pato!

 

Como o Romão Machado já a tinha visto uma vez e me falou disso, suspeitei que fosse uma lontra.

Ficámos à coca e, depois de andar a assustar a passarada toda em redor, ela tornou a aparecer mais próximo de nós, embora não muito...

   

I dedicate this photo to Zéza Lemos, who was with me when I took this shot, and she must have brought me luck, because, as far as I know, this is the first photographic register of an otter in Quinta do Lago:)))

 

He appeared for three times, but he dived immediately! At the first time, I only saw an enormous back appearing at the surface and diving, and I said to Zéza: That is not a duck!

 

We have been looking for a while, and, after being scaring the birds around, he appeared closer to us, although not very close…

 

Quinta do Lago - Portugal

The focus of this week’s Hubble Picture of the Week is the blue compact dwarf galaxy NGC 5253, located in the constellation Centaurus around 11 million light-years from Earth. This new image combines data taken with Hubble’s Advanced Camera for Surveys (ACS), using its Wide Field Channel, and with the older Wide Field and Planetary Camera 2 (WFPC2). As a bonus for this Picture of the Week, there is also a second new image made using data from the High Resolution Channel (HRC) of ACS, a sub-instrument only operational for a few years that was optimised for detailed studies of environments dense with stars.

 

What has interested astronomers so much about this galaxy that three of Hubble’s instruments were used to study it in depth over ten years? It turns out to lie at the focus of a few areas of research where Hubble’s capabilities are essential. Dwarf galaxies are considered important for understanding the evolution of both stars and galaxies through time, since they resemble ancient, distant galaxies. NGC 5253 is called both a “starburst galaxy” and a “blue compact dwarf”: these names mean it is forming clusters of bright, massive stars at an exceptional rate. This Hubble image clearly shows the dense nebula which is being consumed to birth these stars, and which makes NGC 5253 a laboratory to investigate stellar composition, star formation and star clusters, all at once.

 

A tremendously high rate of star formation is a recipe for star clusters, but NGC 5253 goes beyond that: in a small region of the core, the star formation is so intense that the galaxy contains no less than three “super star clusters” (SSCs). SSCs are very bright, populous and massive open clusters which are believed to evolve into globular clusters. Globular clusters themselves offer unique insights into how stars form and evolve, but their origins are poorly understood. Astronomers were therefore eager to make use of the HRC sub-instrument, with its superb resolution, to hone in on these small, very dense clusters of stars.

 

[Image Description: An oval-shaped galaxy, made up of many point-like stars. It is softly lit from the centre, brightest and slightly blue at the very centre and fading to darkness at the edges. Surrounding the galaxy’s core are reddish clouds of gas and dust, most around or behind the core, but a few wisps are in front of it and block some light. Some faraway galaxies and two foreground stars can be seen around the galaxy.]

 

Credits: ESA/Hubble & NASA, A. Zezas, D. Calzetti; CC BY 4.0

#Krashkraft

1 3 4 5 6 7 ••• 79 80