A Casinha da Matemática

A Álgebra é generosa; ela frequentemente dá mais do que aquilo que lhe é pedido. (D'Alembert)

Category: Astronomia

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Astronomia / Ciência e Tecnologia / Vídeo

Universe

Professor Brian Cox journeys across the vastness of time and space revealing epic moments of sheer drama that changed the universe forever

Rogue planets, fossilised stars, black holes more massive than a million Suns. Huge advances in our understanding of the Universe mean that for the first time the BBC can take you to places we didn’t even know existed just ten years ago.

Across five episodes, Professor Brian Cox roams the vastness of space and time uncovering exquisite moments of sheer drama that changed the Universe forever. Watch the birth of a star in a stellar nursery, experience the power … Ler mais

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Astronomia / Ciência e Tecnologia / Vídeo

Brian Cox’s Adventures in Space and Time

Discovering our place in the universe. Brian Cox looks back on a decade of discovery and towards the next space frontier, asking the biggest question of all - what's next?

Brian Cox’s Adventures in Space and Time was produced by BBC Studios Science Unit and is presented by Brian Cox. Emeka Onono serves as Executive Producer. Simon Winchcombe serves as Series Producer. Alastair Duncan serves as the Producer on Episode 1, Naomi Law and Giles Harrison serve as Producers on Episode 2, Kate Szell serves as Producer on Episode 3 and David Briggs serves as Producer on Episode 4. BBC Studios is distributing internationally.

Episode 1: Space: How Far … Ler mais

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Astronomia / Ciência e Tecnologia / Matemática

Poema para Galileu

A Queda Livre – Galileu Descreve o Movimento
Parte 6 de 6 da série A mecânica de Galileu

Poema para Galileu

 

 

 

Diz a minha mãe que eu comecei a fazer versos aos 5 anos e aos 10 tive a comoção de ver os primeiros impressos e públicos.
Escrever poemas foi sempre para mim um estado de angústia, um sofrimento autêntico. Amorteci todo esse sofrimento durante anos até ao dia em que por motivos dolorosos me desfiz dele por completo na ingénua presunção de que me atrapalhava. Sobre isso

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Astronomia / Ciência e Tecnologia / Matemática

Soluções dos Desafios

A Queda Livre – Galileu Descreve o Movimento
Parte 5 de 6 da série A mecânica de Galileu

Soluções dos Desafios

 

Desafio 1

Houve muitos trabalhos que antecederam o de Galileu, no que diz respeito ao movimento. No período de 1280 a 1340, matemáticos de Merton College, em Oxford, meditaram cuidadosamente sobre diversas grandezas que variavam com o tempo. Um teorema geral, conhecido por “Teorema de Merton” ou “Regra da Velocidade Média”, resume um resultado que se mostrou de grande importância.

Este teorema, … Ler mais

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Astronomia / Ciência e Tecnologia / Matemática

Galileu descreve o movimento

A Queda Livre – Galileu Descreve o Movimento
Parte 4 de 6 da série A mecânica de Galileu

Galileu descreve o movimento

Galileu e o seu tempo

Óleo sobre tela por Justus Sustermans. Pintado em 1636 e oferecido por Galileu a um amigo em Paris. Mais tarde fez parte da coleção de Ferdimnado II de Medici; na Galeria degli Uffizi, Firenze, desde 1678.

Galileu Galilei nasceu em Pisa em 1564 – o ano da morte de Miguel Ângelo e do nascimento de Shakespeare. Filho de um nobre … Ler mais

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A teoria aristotélica do movimento

A Queda Livre – Galileu Descreve o Movimento
Parte 3 de 6 da série A mecânica de Galileu

A teoria aristotélica do movimento

O modelo de Universo de Ptolomeu era essencialmente o aristotélico, ou seja, um cosmo finito, constituído de esferas concêntricas, com a Terra imóvel no centro. A atmosfera chegaria até a altura da Lua, definindo o espaço do mundo “sublunar”, constituído por quatro elementos, Terra, Água, Fogo e Ar. A partir da esfera da Lua, no mundo “supralunar”, constituído de um “quinto elemento”, o Éter, haveria … Ler mais

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Astronomia / Ciência e Tecnologia / Matemática

O Museu Galileu

A Queda Livre – Galileu Descreve o Movimento
Parte 2 de 6 da série A mecânica de Galileu

Museu Galileu – Instituto e Museu da História da Ciência

O prédio que abriga o museu é o Palazzo Castellani, que surgiu na região do Castello d’Altafronte – datado de finais do século XI, era a fortaleza que protegia o porto fluvial no Arno e fazia parte da cerca antiga das muralhas de Florença. Está localizado entre a ponte Vecchio e a Piazza della Signoria.

O Museu da História … Ler mais

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Astronomia / Ciência e Tecnologia / Matemática

Introdução à mecânica de Galileu

A Queda Livre – Galileu Descreve o Movimento
Parte 1 de 6 da série A mecânica de Galileu

Abordaremos o desenvolvimento de um importante exemplo de investigação básica: o estudo dos corpos em queda livre feito por Galileu Galilei. Embora o problema físico da queda livre seja por si só interessante, o estudo será orientado para a maneira como Galileu, um dos primeiros cientistas modernos, apresentou os seus argumentos. A sua perspetiva do mundo, a sua maneira de pensar, o seu uso da matemática e a sua … Ler mais

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Astronomia / Ciência e Tecnologia / Vídeo

The Space Shuttle: A Horizon Guide

Documentary which brings together coverage from three decades of BBC programmes to present a biography of the space shuttle, from triumph to tragedy, and considers its legacy

In 2011, after more than 30 years of service, America’s space shuttle took to the skies for the last time. Its story has been characterised by incredible triumphs, but blighted by devastating tragedies – and the BBC and Horizon have chronicled every step of its career. This unique and poignant Horizon Guide brings together coverage from three decades of programmes to present a biography of the shuttle and to ask what its legacy will be. Will it be remembered as … Ler mais

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Astronomia / Ciência e Tecnologia / Vídeo

Horizon: Seeing Stars

Horizon follows the astronomers pushing the limits of science and engineering with a new generation of supertelescopes in the hunt for mysterious objects in the universe

Around the world, a new generation of astronomers are hunting for the most mysterious objects in the universe. Young stars, black holes, even other forms of life.

They have created a dazzling new set of supertelescopes that promise to rewrite the story of the heavens.

This film follows the men and women who are pushing the limits of science and engineering in some of the most extreme environments on earth. But most strikingly of all, no-one really knows what they … Ler mais

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Astronomia / Ciência e Tecnologia / Vídeo

Horizon: Secrets of the Solar System

A look at how new planets being discovered are forcing scientists to rewrite the history of our own solar system

New planets are now being discovered outside our solar system on a regular basis, and these strange new worlds are forcing scientists to rewrite the history of our own solar system. Far from a simple story of stable orbits, the creation of our solar system is a tale of hellfire, chaos and planetary pinball.

It’s a miracle our Earth is here at all.

Fonte: BBC TWO | Horizon: Secrets of the Solar System

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Horizon: The Mystery of Dark Energy

Horizon looks at dark energy - the mysterious force that is unexpectedly causing the universe's expansion to speed up

The effects of dark energy were discovered in 1998, but physicists still don’t know what it is. Worse, its very existence calls into question Albert Einstein‘s general theory of relativity – the cornerstone of modern physics.

The hunt for the identity of dark energy is on. Experiments on earth and in space generate data that might provide a clue, but there are also hopes that another Einstein might emerge – someone who can write a new theory explaining the … Ler mais

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Astronomia / Ciência e Tecnologia / Vídeo

Horizon: Is Everything We Know About The Universe Wrong?

Investigating the discovery of what is ominously being called 'dark flow', a phenomenon which could mean scientists might have to find a new way of understanding the universe

There’s something very odd going on in space – something that shouldn’t be possible. It is as though vast swathes of the universe are being hoovered up by a vast and unseen celestial vacuum cleaner.

Sasha Kashlinsky, the scientist who discovered the phenomenon, is understandably nervous: ‘It left us quite unsettled and jittery’ he says, ‘because this is not something we planned to find’. The accidental discovery of what is ominously being called ‘dark flow‘ not only … Ler mais

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Astronomia / Ciência e Tecnologia / Vídeo

The Fabric of the Cosmos

Acclaimed physicist Brian Greene reveals a mind-boggling reality beneath the surface of our everyday world

“The Fabric of the Cosmos”, a four-hour series based on the book by renowned physicist and author Brian Greene, takes us to the frontiers of physics to see how scientists are piecing together the most complete picture yet of space, time, and the universe. With each step, audiences will discover that just beneath the surface of our everyday experience lies a world we’d hardly recognize — a startling world far stranger and more wondrous than anyone expected.

Brian Greene … Ler mais

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Astronomia / Ciência e Tecnologia / Vídeo

Origins

Journey back to the beginning of everything: the universe, Earth and life itself

Has the universe always existed? How did it become a place that could harbor life? What was the birth of our planet like? Are we alone, or are there alien worlds waiting to be discovered?

NOVA presents some startling new answers in “Origins,” a groundbreaking four-part NOVA miniseries hosted by dynamic astrophysicist Neil deGrasse Tyson, Director of the Hayden Planetarium at the American Museum of Natural History. Tyson leads viewers on a cosmic journey to the beginning of … Ler mais

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Astronomia / Ciência e Tecnologia / Vídeo

Cosmos: A Personal Voyage

Carl Sagan's classic 1980 documentary series covering a wide range of scientific subjects, including the origin of life and a perspective of our place in the universe

Cosmos: A Personal Voyage is a thirteen-part television series written by Carl Sagan, Ann Druyan, and Steven Soter, with Sagan as presenter. It was executive-produced by Adrian Malone, produced by David Kennard, Geoffrey Haines-Stiles, and Gregory Andorfer, and directed by the producers, David Oyster, Richard Wells, Tom Weidlinger, and others. It covers a wide range of scientific subjects, including the origin of life and a perspective of our place in the universe.

The series was first … Ler mais