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The Visible Universe, Then and Now

The Visible Universe, Then and Now
Before the telescope was invented in 1608, our picture of the universe consisted of six planets, our moon, the sun and any stars we could see in the Milky Way galaxy. But as our light-gathering capabilities have grown, so too have the boundaries of the visible universe. Our interactive map shows how the known universe has grown from 1950 to 2011. In the late 1700s, William Herschel, an English astronomer using a telescope with an 18.7-inch aperture, made the first systematic surveys of the skies, revealing more than 2,000 distant galaxies, nebulae and other objects invisible to the naked eye. Since then, increasingly powerful optical and radio telescopes have greatly expanded our store of knowledge. Related:  visualisation/illustration scientifiqueéchelles/taille de l'UniversOpen Data

New project: Canvi & temps Canvi & temps are two network browsing spaces built from a compilation of articles, pages, persons and links, all related with complexity in science. The research was carried out by Pau Alsina, Josep Perelló, Michele Catanzaro, Pere Monràs, Carles Tardío, Oriol Vallès, Irma Vilà and Santiago Ortiz. The project is in display at Arts Santa Mónica, in the context of a Cultures of Change exhibit. This historical (it includes citations since 1927) and transversal (it contains more than 30 categories of fields of knowledge) research offers and ample vision of the collection of aproaches, strategies and tactics, reseach methods and interests known as complexity science. Canvi & Temps offer two different ways of experiencing the contents of the network and its interrelations. Temps The interest in representing changes associated with complexity science through time (from 1927, which is the chronological reference in the field, up to date) rose from internal dialogue within our research group.

The Scale of the Universe Interactive Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2012 March 12 The Scale of the Universe - Interactive Flash Animation Credit & Copyright: Cary & Michael Huang Explanation: What does the universe look like on small scales? Tomorrow's picture: dust before galaxies Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)NASA Official: Phillip Newman Specific rights apply.NASA Web Privacy Policy and Important NoticesA service of:ASD at NASA / GSFC& Michigan Tech.

Presse - Article - Les journalistes français sur Twitter vus comme un graphe En suivant le paradigme méthodologique des Digital Methods, développé notamment par Richard Rogers à l’université d’Amsterdam (2009), nous pouvons envisager un groupe social qui s’active sur l’internet comme un graphe. Dans le cas qui nous intéresse ici, les nœuds du graphe sont les comptes des journalistes français sur Twitter et les connections entre eux sont constitués par des actions de communication comme les retweets et les mentions. Les premiers consistent à rediffuser tel quel un message d’un autre utilisateur. Les secondes consistent à inclure le nom d’un compte dans un message diffusé. Elles visent soit à s’adresser à cet utilisateur, soit à parler de lui. [6]. Entre le 15 février et le 15 avril 2011 nous avons procédé à une cartographie de la Twittoshère journalistique française. [7]. Carte 1 : vue d’ensemble de la Twittosphère journalistique française. Carte 2 : réseaux d’affinités à l’intérieur de la Twittosphère journalistique.

QSR 2010 - Changement climatique - De quels problèmes s’agit-il? Le changement climatique est largement reconnu mais son rythme et ses impacts sont incertains Le Groupe d’experts intergouvernemental sur l’évolution du climat (GIEC) de l’ONU a averti que si les émissions de gaz à effet de serre se poursuivent à un niveau égal ou supérieur au niveau actuel, le réchauffement sera plus important. De nombreuses modifications du système climatique global se produiront au cours du XXIe siècle et, selon les projections, devraient être plus importantes que celles observées pendant le XXe siècle Figure 3.1. Ces changements pourraient dépasser la variabilité multidécénale naturelle et entraîner des modifications permanentes des écosystèmes. Toute une série d’impacts sur le milieu marin sont attribués au changement climatique Figure 3.2, soit directement (modification de la température de la mer) soit indirectement (modification de la saisonnalité, de la distribution et de l’abondance des espèces). stratification efflorescences algales nuisibles .

The Elegant Universe: Pt 1 The Elegant Universe: Part 3 PBS Airdate: November 4, 2003 NARRATOR: Now, on NOVA, take a thrill ride into a world stranger than science fiction, where you play the game by breaking some rules, where a new view of the universe pushes you beyond the limits of your wildest imagination. This is the world of "string theory," a way of describing every force and all matter from an atom to earth, to the end of the galaxies—from the birth of time to its final tick, in a single theory, a "Theory of Everything." Our guide to this brave new world is Brian Greene, the bestselling author and physicist. BRIAN GREENE (Columbia University): And no matter how many times I come here, I never seem to get used to it. NARRATOR: Can he help us solve the greatest puzzle of modern physics—that our understanding of the universe is based on two sets of laws that don't agree? NARRATOR: Resolving that contradiction eluded even Einstein, who made it his final quest. S. BRIAN GREENE:The atmosphere was electric. S.

Canvi & Temps: An Exploration of Science Over Time Bestiario, the group behind 6pli and a number of other network projects, released their most recent project - Canvi & Temps - that explores the complexity of science since the early 1920s. The first part, Temps, is two linked charts stacked on top of each other. On top are individual articles and on bottom are tags that provide context to those articles. You'll probably be tempted to read the visualization as a stacked area chart, but that wouldn't quite work. It reminds me a lot of Bestiario's earlier Atlas of Electromagnetic Space. Then there's Canvi, which is a network view of tags and links: I'm not completely sure what I'm looking at with Canvi. The uniqueness of Canvi lays in the fact that it explores new node positioning techniques as well as their spatial relations. Yeah, I'm still not sure, but it's nice to look at. [Thanks, Jose]

La plus grande image du ciel jamais obtenue « meridianes La collaboration Sloan Digital Sky Survey-III, qui regroupe notamment des chercheurs du CNRS et du CEA, vient de mettre à la disposition de la communauté scientifique internationale le plus grand relevé du ciel jamais effectué, à l’occasion de la réunion annuelle de la Société Américaine d’Astronomie qui se tient à Seattle du 10 au 13 janvier 2011. Ce relevé a permis de construire une image dont on a extrait un catalogue de sources d’une grande partie du ciel en cinq couleurs et d’une qualité sans précédent (couverture du ciel, profondeur, précision de la mesure des luminosités). Ce catalogue, qui contient environ 470 millions d’objets (galaxies, étoiles, quasars…), fait l’objet d’une publication dans la revueAstrophysical Journal Supplements. L’image du ciel obtenue est d’une résolution d’un térapixel (mille milliards de pixels) et en cinq couleurs. Like this: J'aime chargement…

An Annual Report on One Man's Life Nick Bilton/The New York TimesNicholas Felton and his 2008 annual report. At the end of 2005, Nicholas Felton decided to publish a report that would chronicle his life over the previous year. He looked through his music archives to see how many songs he had listened to. He checked his airline ticket stubs to see how many miles he had flown. He aggregated the number of books read and photos taken. The following year, Mr. The tradition continues today. “I started collecting this data in 2005, and I hope to continue the collection process for at least a decade,” Mr. Although this data collection started with a simple curiosity, it also helped Mr. Each year, Mr. “I wanted to understand the bleeding edge of reporting and quantifying myself,” Mr. The works of Mr. But they also signal the kind of data collection that is becoming easier for all of us to do. It didn’t take long before strangers started asking how to create their own reports to quantify and collect information on themselves. Mr.

Robin Hood tax The Robin Hood tax commonly refers to a package of financial transaction taxes (FTT), proposed by a campaigning group of civil society NGOs. Campaigners have suggested the tax could be implemented globally, regionally or unilaterally by individual nations. Conceptually similar to the Tobin tax, it would affect a wider range of asset classes including the purchase and sale of stocks, bonds, commodities, unit trusts, mutual funds, and derivatives such as futures and options. The Tobin tax was proposed for foreign currency exchange only. By autumn 2011 the Robin Hood campaign had gained considerable extra momentum and support from prominent opinion formers, with a proposal from the European Commission to implement an FTT tax at EU level set to enter the legislative pipeline. Early history of the terminology[edit] In 2001 the charity War on Want released The Robin Hood Tax,[12] an earlier proposal presenting their case for a currency transaction tax. The 2010 UK campaign[edit]

DEUS, la première simulation complète de l'univers observable Un consortium baptisé DEUS effectue depuis plusieurs années des simulations de la formation des grandes structures de l’univers selon son contenu en matière et énergie noire . Le groupe de chercheurs français du Laboratoire Univers et Théories (LUTH), au cœur de ce projet, vient de réaliser la première simulation de tout le volume de l’univers observable, du Big Bang jusqu’à aujourd’hui, avec une constante cosmologique . Ce n’est qu’un début. Parcourez notre dossier complet sur l' énergie noire Un des verrous à faire sauter pour comprendre l’évolution de l’univers, du Big Bang au Vivant , et tenter de prédire son destin, est incontestablement de faire la lumière sur la nature de l’énergie noire. Une façon de le savoir est de déterminer l’influence exacte de l’énergie noire sur la formation des grandes structures dans l’univers, celles contenant des amas de galaxies . L'énergie noire sur supercalculateurs Les cosmologistes vont donc maintenant plus loin. Ce sujet vous a intéressé ?

What topics science lovers link to the most Hilary Mason, chief scientist at bitly, examined links to 600 science pages and the pages that those people visited next: The results revealed which subjects were strongly and weakly associated. Chemistry was linked to almost no other science. Biology was linked to almost all of them. The interactive lets you poke around the data, looking at connections sorted from weakest (fewer links) to strongest (more links), and nodes are organized such that topics with more links between each other are closer together. Natural next step: let me click on the nodes. [Scientific American via @hmason]

Sizes of the Universe Poster Share this infographic on your site! <a href=" src=" alt="Sizes of the Universe" width="500" border="0" /></a><br />Source: <a href=" Sleuth</a> Embed this infographic on your site! Have you ever wondered how big the universe is? Interact: Magnifying the Universe Interactive Infographic