Em Hydra, a Dança Cósmica - ARP 132 - realizada pela interação entre duas galáxias formando ora um Pingüim e seu ovo e ora um Golfinho
Autor: Janine Milward | Publicado: 2017-02-05T04:30:00-02:00

Olá!


Nesses tempos de Lua Crescente

e desaparecendo atrás do horizonte oestenas primeiras horas da madrugada,temos a oportunidade de observaralgumas constelações que se apresentamapós Selene esconder-se

e aguardando a chegada da luminosidade
que anuncia a chegada do Sol.
Em nossa Postagem anterior,
estivemos começando a comentar
sobre&nbsp;a belíssima (e tímida)&nbsp;


constelação da Hydra, a Hidra Fêmea,

a mais longa constelação no céu&nbsp;

e também a maior em termos de área ocupada.&nbsp;



Nossa atenção esteve voltada para a nebulosa planetária

O Fantasma de Júpiter, NGC 3242,

escondida em um dos enroscamentos enredilhadores

e serpenteadores&nbsp;de Hydra, a Hidra Fêmea

- e, coincidentemente, tendo Júpiter cumprimentando-a,

mesmo que de longe e apenas visualmente,
&nbsp;a partir de sua conjunção
com a estrela-alpha Virginis, Spica
- duas luzes iluminando a Virgem,
uma bem esbranquiçada e outra bem azulada.



Em nossa Postagem de hoje, Caro Leitor,

estaremos trazendo a você um objeto celeste



que nos revela uma belíssima imagem&nbsp;

realizada através&nbsp;a interação entre duas Galáxias,&nbsp;



uma espiral e outra elíptica



- NGC 2936 e NGC 2937 -



formando o Objeto denominado ARP 142



ora&nbsp;

chamado de Pingüim (e seu ovo)



ou

ora chamado Golfinho... ou Boto...

e também, quem sabe, figurando um passarinho....







326 milhões de anos nos separam desta maravilha!&nbsp;&nbsp;





É UMA DANÇA CÓSMICA!













Realmente, Hydra é uma constelação interessantíssima

de ser observada a olho nú

- somente em noites de céus escuros e transparentes

e de ausência da luminosidade da Lua!


E, através potentes telescópios,

Hydra é, certamente, uma constelação

que nos apresenta Objetos Celestes de tirar o fôlego!



Com um abraço estrelado,


Janine Milward








Stellarium



















Stellarium












http://hubblesite.org/newscenter/archive/releases/2013/23/image/a/format/web_print/




Hydra é uma constelação&nbsp;composta de estrelinhas&nbsp;

que vão se enroscando, serpenteando através os céus estrelados


- quase como que realizando uma linha divisória

&nbsp;entre algumas constelações do Zodíaco:




A cabeça da Hydra é um asterimo&nbsp;

que surge acima do equador&nbsp;



em direção à constelação de Câncer, o Caranguejo.




O coração da Hydra é sugerido pela estrela-alpha Hydrae, Alphard,


maravilhosamente amarelada/alaranjada e esmaecida&nbsp;


- porém a mais brilhante


de toda esta longa constelação!





O corpo de cobra vai serpenteando através o céu do sul,

&nbsp;começando em Câncer e tendo o Leão ao norte,&nbsp;

depois o Sextante e então a Taça e o Corvo

&nbsp;e ainda Virgem até terminar sua cauda fina em Libra, a Balança.

Ao sul, a Hydra faz seus encontros com o Cão Menor,&nbsp;

o Monoceros, a Popa do Navio, o Peixe Austral,&nbsp;

Antlia e o Centauro.





Stellarium




http://www.aradergalleries.com/detail.php?id=3638

Johann Bayer — Hydra










http://www.iau.org/static/public/constellations/gif/HYA.gif


&nbsp;Caro Leitor,
encontre mais abaixo

a belíssima imagem realizada através

a interação entre duas Galáxias,&nbsp;
uma espiral e outra elíptica

- NGC 2936 e NGC 2937 -

formando o Objeto denominado ARP 142

ora&nbsp;
chamado de Pingüim (e seu ovo)

ou
ora chamado Golfinho.



326 milhões de anos nos separam desta maravilha!&nbsp;&nbsp;


É UMA DANÇA CÓSMICA!















http://hubblesite.org/newscenter/archive/releases/2013/23/image/a/format/web_print/



http://www.nasa.gov/mission_pages/hubble/science/colliding-galaxies-arp142.html#.U0VnkahdVbd

This striking NASA Hubble Space Telescope image, which shows what looks like the profile of a celestial bird, belies the fact that close encounters between galaxies are a messy business.

This interacting galaxy duo is collectively called Arp 142. The pair contains the disturbed, star-forming spiral galaxy NGC 2936, along with its elliptical companion, NGC 2937 at lower left.

Once part of a flat, spiral disk, the orbits of the galaxy's stars have become scrambled due to gravitational tidal interactions with the other galaxy. This warps the galaxy's orderly spiral, and interstellar gas is strewn out into giant tails like stretched taffy.

Gas and dust drawn from the heart of NGC 2936 becomes compressed during the encounter, which in turn triggers star formation. These bluish knots are visible along the distorted arms that are closest to the companion elliptical. The reddish dust, once within the galaxy, has been thrown out of the galaxy's plane and into dark veins that are silhouetted against the bright starlight from what is left of the nucleus and disk.

The companion elliptical, NGC 2937, is a puffball of stars with little gas or dust present. The stars contained within the galaxy are mostly old, as evidenced by their reddish color. There are no blue stars that would be evidence of recent star formation. While the orbits of this elliptical's stars may be altered by the encounter, it's not apparent that the gravitational pull by its neighboring galaxy is having much of an effect.

Above the pair, an unrelated, lone, bluish galaxy, inconsistently cataloged as UGC 5130, appears to be an elongated irregular or an edge-on spiral. Located 230 million light-years away, this galaxy is much closer to us than the colliding pair, and therefore is not interacting with them. It happens to lie along the same line of sight to foreground Milky Way stars caught in the image.

Arp 142 lies 326 million light-years away in the southern constellation Hydra. It is a member of the Arp catalog of peculiar galaxies observed by astronomer Halton C. Arp in the 1960s.

This color image is a composite of Wide Field Camera 3 photos taken in visible, red, and infrared light.

The Hubble Space Telescope is a project of international cooperation between NASA and the European Space Agency. NASA's Goddard Space Flight Center in Greenbelt, Md., manages the telescope. The Space Telescope Science Institute (STScI) in Baltimore, Md., conducts Hubble science operations. STScI is operated by the Association of Universities for Research in Astronomy Inc., in Washington.

For images, video, and more information about Arp 142, visit:

http://hubblesite.org/news/2013/23
http://heritage.stsci.edu/2013/23
http://www.spacetelescope.org/news/heic1311

For more information about the Hubble Space Telescope, visit:

http://www.nasa.gov/hubble

For additional information, contact:

Ray Villard
Space Telescope Science Institute, Baltimore, Md.
410-338-4514
villard@stsci.edu

Zolt Levay
Space Telescope Science Institute, Baltimore, Md.
410-338-4907
levay@stsci.edu


http://www.nasa.gov/mission_pages/hubble/science/colliding-galaxies-arp142.html#.U0VnkahdVbd








http://en.wikipedia.org/wiki/File:HydraCC.jpg



Description
English:&nbsp;Photography of the constellation Hydra, the water snake

Deutsch:&nbsp;Fotografie des Sternbildes Hydra, der Wasserschlange

Date14 March 2004
SourceOwn work:&nbsp;AlltheSky.com
AuthorTill Credner








AS GALÁXIAS&nbsp;

- NGC 2936 E NGC 2937


NGC 2936&nbsp;é uma&nbsp;galáxia&nbsp;elíptica&nbsp;(E) localizada na direcção da&nbsp;constelação&nbsp;de&nbsp;Hydra. Possui uma declinação de +02° 45' 38" e uma&nbsp;ascensão recta&nbsp;de 9&nbsp;horas, 37&nbsp;minutose 44,4&nbsp;segundos.

A galáxia&nbsp;NGC 2936&nbsp;foi descoberta em&nbsp;3 de Março&nbsp;de&nbsp;1864&nbsp;por&nbsp;Albert Marth.

NGC 2936
Descoberto porAlbert Marth
Data de descoberta3 de Marçode&nbsp;1864
Dados observacionais (J2000)
ConstelaçãoHydra
Tipoelíptica&nbsp;(E)
Asc. reta09h 37m 44,4s
Declinação+02° 45' 38"
Distânciaanos-luz&nbsp;(kpc)
Magnit. apar.12,9
Dimensões1,3' × 0,5'
Características físicas
Raioanos-luz
Outras denominações
2936, UGC 5130, MCG 1-25-5, ZWG 35.15, ARP 142, VV 316, PGC 27422
Mapa







http://pt.wikipedia.org/wiki/NGC_2936









NGC 2937&nbsp;é uma&nbsp;galáxia&nbsp;elíptica&nbsp;(E) localizada na direcção da&nbsp;constelação&nbsp;de&nbsp;Hydra. Possui uma declinação de +02° 44' 53" e uma&nbsp;ascensão recta&nbsp;de 9&nbsp;horas, 37&nbsp;minutose 45,1&nbsp;segundos.

A galáxia&nbsp;NGC 2937&nbsp;foi descoberta em&nbsp;3 de Março&nbsp;de&nbsp;1864&nbsp;por&nbsp;Albert Marth.

NGC 2937
Descoberto porAlbert Marth
Data de descoberta3 de Marçode&nbsp;1864
Dados observacionais (J2000)
ConstelaçãoHydra
Tipoelíptica&nbsp;(E)
Asc. reta09h 37m 45,1s
Declinação+02° 44' 53"
Distânciaanos-luz&nbsp;(kpc)
Redshift0,023316
Magnit. apar.13,6
Dimensões0,8' × 0,6'
Características físicas
Raioanos-luz
Outras denominações
2937, UGC 5131, MCG 1-25-6, ZWG 35.15, ARP 142, VV 316, NPM1G +02.0225, PGC 27423
Mapa







http://pt.wikipedia.org/wiki/NGC_2937







Mario Jaci Monteiro - As Constelações, Cartas Celestes


Colliding Galaxy Pair Takes Flight

Compass and Scale Image for Arp 142

What looks like a celestial hummingbird is really the result of a collision between a spiral and an elliptical galaxy at a whopping 326 million light- years away. The flat disk of the spiral NGC 2936 is warped into the profile of a bird by the gravitational tug of the companion NGC 2937. The object was first cataloged as a "peculiar galaxy" by Halton Arp in the 1960s. This interacting galaxy duo is collectively called Arp 142.

http://hubblesite.org/newscenter/archive/releases/2013/23



Object Names:&nbsp;Arp 142, NGC 2396/2397

Image Type:&nbsp;Astronomical/Illustration



Credit:&nbsp;NASA,&nbsp;ESA, and Z. Levay (STScI/AURA)

http://hubblesite.org/newscenter/archive/releases/2013/23/image/b/format/web_print/



About the Object
Object Name:Arp 142, NGC 2936/2937
Object Description:Interacting Galaxy Pair
Position (J2000):RA: 09h 37m 43s.10Dec: +02° 45' 47".02
Constellation:Hydra
Distance:326 million light-years (100 megaparsecs)









VEJA OS VÍDEOS:





The southern constellation Hydra is home to an unusual deep-sky object. Located 326 million light-years away, it was first cataloged in the 1960s as a peculiar galaxy. In this Hubble Space Telescope view, the celestial wonder looks more like a hummingbird next to an egg. In reality, it is a pair of galaxies that are colliding with each other. The blue galaxy once had a pinwheel shape, like that of our Milky Way. But the gravitational pull of a nearby companion galaxy has stretched it like a piece of taffy. Collisions like this were common in the early universe.

Credit:&nbsp;NASA,&nbsp;ESA, G. Bacon, L. Frattare, Z. Levay, and F. Summers (Viz 3D Team,&nbsp;STScI), and M. Estacion (STScI)


http://hubblesite.org/newscenter/archive/releases/2013/23/video/b/





https://www.youtube.com/watch?v=MtRFrh_w6BQThis video explores the violent world of galactic mergers, as shown by the cosmic duo Arp 142 in a stunning new image from the NASA/ESA Hubble Space Telescope. Galaxies spend most of their life&nbsp;drifting through the cosmic expanse in isolation. But, every so often, two unfortunate galaxies stray a little too close to one another — as is the case with Arp 142. Showcased in a stunning new image from Hubble, these two galaxies uncannily resemble a penguin guarding its egg. The galaxies are in middle of a violent merger, with clouds of gas and dust colliding at breakneck speeds and triggering bursts of star formation.








&nbsp;http://www.spacetelescope.org/videos/heic1311a/






Hubblecast 67: Of galaxies and penguins — Arp 142
www.spacetelescope.org




This episode of the Hubblecast explores the violent world of galactic mergers, as shown by the cosmic duo Arp 142 in a stunning new image from the NASA/ESA Hubble Space Telescope.



Galaxies spend most of their life drifting through the cosmic expanse in isolation. But, every so often, two unfortunate galaxies stray a little too close to one another — as is the case with Arp 142. Showcased in a stunning new image from Hubble, these two galaxies uncannily resemble a penguin guarding its egg. The galaxies are in middle of a violent merger, with clouds of gas and dust colliding at breakneck speeds and triggering bursts of star formation.


Credit:


ESA/Hubble












http://www.raremaps.com/gallery/detail/28800/Hydra_Stars_heightened_in_gold/Hevelius.html

ap Maker:&nbsp;Johannes&nbsp;Hevelius
















A DANÇA CÓSMICA!



http://hubblesite.org/newscenter/archive/releases/2013/23/image/a/format/large_web/









Caro Leitor:



É interessante observarmos que



NA CONSTELAÇÃO DO CARANGUEJO

- imediatamente ao norte da cabeça da Hydra -

VAMOS ENCONTRAR


NGC 2623&nbsp; - Galáxia - ou ARP 243

Uma galáxia pouco usual&nbsp; com longos filamentos


E FAZENDO ACONTECER
A FIGURA DE UM PÁSSARO,

UM BEIJA-FLOR!










"NGC 2623 Hubble heic0912a" por ESA/Hubble. Licenciado sob CC BY 3.0, via Wikimedia Commons - https://commons.wikimedia.org/wiki/File:NGC_2623_Hubble_heic0912a.jpg#/media/File:NGC_2623_Hubble_heic0912a.jpg








http://apod.nasa.gov/apod/image/1210/NGC2623_HLApugh.jpg



Merging NGC 2623&nbsp;Image Credit:&nbsp;Hubble Legacy Archive,&nbsp;ESA,&nbsp;NASA;&nbsp;Processing&nbsp;-&nbsp;Martin Pugh
Explanation:&nbsp;NGC 2623 is&nbsp;really two galaxies that are becoming one. Seen to be in the final stages of a&nbsp;titanic galaxy merger, the pair lies some 300 million light-years distant toward the constellation Cancer. The violent encounter between two galaxies that may have been similar&nbsp;to the Milky Way&nbsp;has produced widespread star formation near a luminous core and along&nbsp;eye-catching tidal tails. Filled with dust, gas, and young blue star clusters, the opposing tidal tails extend well over 50,000 light-years from the merged nucleus. Likely triggered by the merger, accretion by a supermassive black hole drives activity within the nuclear region. The star formation and its&nbsp;active galactic nucleus&nbsp;make&nbsp;NGC 2623&nbsp;bright across the spectrum. This sharp cosmic snapshot of NGC 2623 (aka Arp 243) is based on Hubble Legacy Archive image data that also reveals&nbsp;even more distant&nbsp;background galaxies scattered through the field of view.



Com um abraço estrelado,

Janine Milward