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Power BI e Power Query: Dominando o Tratamento e a Preparação de Dados

Power BI e Power Query: Dominando o Tratamento e a Preparação de Dados

06/09/2025/

Power BI: Guia Completo para Iniciantes e Profissionais de Dados

Power BI: Guia Completo para Iniciantes e Profissionais de Dados

06/09/2025/

Resenha: O Guia do Mochileiro das Galáxias – Douglas Adams

Resenha: O Guia do Mochileiro das Galáxias – Douglas Adams

18/05/2025/

Webb da NASA pega ampulheta de fogo como novas formas estelares

Webb da NASA pega ampulheta de fogo como novas formas estelares

18/05/2025/

GTA 6 é adiado para maio de 2026

GTA 6 é adiado para maio de 2026

11/05/2025/

This luminous Picture of the Week shows Z 229-15 — imaged here in beautiful detail by the NASA/ESA Hubble Space Telescope — a celestial object that lies about 390 million light-years from Earth in the constellation Lyra. Z 229-15 is one of those interesting celestial objects that, should you choose to research it, you will find defined as several different things: sometimes as an active galactic nucleus (an AGN); sometimes as a quasar; and sometimes as a Seyfert galaxy. Which of these is Z 229-15 really? The answer is that it is all of these things all at once, because these three definitions have significant overlap. AGNs and quasars are both described in detail in the Hubble Word Bank, but in essence an AGN is a small region at the heart of certain galaxies (called active galaxies) that is far brighter than just the galaxy’s stars would be. The extra luminosity is due to the presence of a supermassive black hole at the galaxy’s core. Material sucked into a black hole actually doesn’t fall directly into it, but instead is drawn into a swirling disc, from where it is inexorably tugged towards the black hole. This disc of matter gets so hot that it releases a large amount of energy across the electromagnetic spectrum, and that’s what makes AGNs appear so bright. Quasars are a particular type of AGN; they are typically both extremely bright and extremely distant from Earth — several hundred million light-years is considered nearby for a quasar, making Z 229-15 positively local. Often an AGN is so bright that the rest of the galaxy cannot be seen, but Seyfert galaxies are active galaxies that host very bright AGNs (quasars) while the rest of the galaxy is still observable. So Z 229-15 is a Seyfert galaxy that contains a quasar, and that, by definition, hosts an AGN. Classification in astronomy can be a challenge! [Image Description: A spiral galaxy. It has two almost-straight arms coming from the left and right of the core that meet a starry ring arou

Hubble vê uma intrigante galáxia ativa

11/05/2025/

Trump vai investir meio trilhão de dólares em I.A

Trump vai investir meio trilhão de dólares em I.A

26/01/2025/

pessoa analisando dados

Power BI: A Ferramenta de Business Intelligence que está Transformando Empresas

26/01/2025/

principais ferramentas de business

As Principais Ferramentas de Análise de Dados para Business Intelligence

20/01/2025/

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