Astronomers have recently immortalized a rare galaxy. Described as “a circle of cosmic fire”, this ring galaxy is located 11 billion light years from the Solar System.
If you are not familiar with ring galaxies, you will be amazed to discover (image below): a splendid silver circle studded with , carrying in its heart the golden sparkle of a nucleus of yellow stars. A true cosmic gem, Hoag’s object is as breathtaking as it is rare. This is why the enthusiasm of should be at its Conversely, the frameworks with industrial trusses are formed of close triangulations, … “data-image =” https://cdn.futura-sciences.com/buildsv6/images/midioriginal/8/1 /f/81fb75c45b_50035589_charpente.jpg “data-url =” https://news.google.com/maison/definitions/maison-comble-7075/ “data-more =” Read more “> with the discovery of R5519, a 11 billion year old ring, recently seen from every angle.
Remains of a cosmic encounter
From a unit of mass: the kilogram
The mass is represented by the symbol m and, in … “data-image =” https://cdn.futura-sciences.com/buildsv6/images/midioriginal/8/4/b/84b0382c5e_80528_masse.jpg “data- url = “https://news.google.com/sciences/definitions/physique-masse-15213/” data-more = “Read more”> bordering that of our own From Earth, we can only observe a cross section … “data-image =” https://cdn.futura-sciences.com/buildsv6/images/midioriginal/7/7/7 /777b761907_120668_voie-lactee-galaxie.jpg “data-url =” https://news.google.com/sciences/definitions/univers-voie-lactee-3729/ “data-more =” Read more “> , but much more extensive, R5519 is distinguished by its extraordinary dimensions. The empty space at its center measures more than two billion times the Earth-Sun distance. ” It manufactures stars at a rate 50 times that of the Milky Way, comments lead author Tiantian Yuan of the Australian center ASTRO 3D. Most of this activity takes place in its ring – so it’s truly a ring of fire ” Thanks to spectroscopic analyzes, the researcher and her team were able to identify the components of this amazing structure. ” It’s a strange object, such as we have never seen before “, She notes.
, published in the journal Nature Astronomy, reveal that this is a galaxy with a so-called collisional ring, the first ever spotted in the most distant regions of the universe’s history begins some 13.7 billion years ago an extremely dense and hot soup. The laws of physics as we … “data-image =” https://cdn.futura-sciences.com/buildsv6/images/midioriginal/1/5/5/1557798396_80921_univers.jpg “data-url = “https://news.google.com/sciences/definitions/astronomie-univers-15239/” data-more = “Read more”> , and one of the rarest types of galaxies. Astronomers postulate that these appear when a small galaxy passes through a larger one. The galaxies being mainly made up of vacuum, it is not so much the collision between their respective stars which would create this form of ring so distinctive, but rather the gravitational disturbances resulting from this meeting. These would allow Figurative sense: sudden appearance of an idea, a social, economic, political fact.
The term emergence is used in many fields.
Exit out … “data-image =” https://cdn.futura-sciences.com/buildsv6/images/midioriginal/4/e/f/4ef87a3a65_50036395_papillon-chrysalide-bernard-schmeltz.jpg “data-url =” https://news.google.com/planete/definitions/zoologie-emergence-8743/ “data-more =” Read more “> of a wave which would cause the stars to move towards the outer edge of the largest galaxy.
The genesis of spiral galaxies
But R5519 not only tells us more about ring galaxies: it could also help researchers determine when The disk contains several luminous arms which spirally wrap around the bulb. The arms contain the stars the … “data-image =” https://cdn.futura-sciences.com/buildsv6/images/midioriginal/6/e/6/6e6981356f_50034127_galaxie-spirale-ngc-1187-eso.jpg “data-url =” https://news.google.com/sciences/definitions/univers-galaxie-spirale-42/ “data-more =” Read more “> , such as the Milky Way, have appeared. The shape of a collisional ring galaxy implies that it had a thin disc before the collision took place. Composed of a mixture of , of dust and stars, this disc has in its center a thicker bulb, mainly composed of stars. Essential step in the formation of spiral galaxies, these discs appeared gradually after the , as organic matter, nitrogenous matter, etc.
There are different families like:
organic matter, which constitutes living things (animals or plants) or … “data-image =” https://cdn.futura-sciences.com/buildsv6/images/midioriginal/e/7/0/e70ccaaf4a_91935_matiere. jpg “data-url =” https://news.google.com/sciences/definitions/matiere-matiere-15841/ “data-more =” Read more “> became more and more defined.
” In the case of this ring galaxy, we observe the Universe 11 billion years ago, at a time when thin disks were just beginning to assemble, comments Kenneth Freeman, co-author of the study. By comparison, the thin disc of our Milky Way began to assemble only about nine billion years ago. This discovery indicates that the formation of discs in spiral galaxies took place over a longer period than we previously thought “