The Death of Stars
In Our Time7 Jul 2022

The Death of Stars

Melvyn Bragg and guests discuss the abrupt transformation of stars after shining brightly for millions or billions of years, once they lack the fuel to counter the force of gravity. Those like our own star, the Sun, become red giants, expanding outwards and consuming nearby planets, only to collapse into dense white dwarves. The massive stars, up to fifty times the mass of the Sun, burst into supernovas, visible from Earth in daytime, and become incredibly dense neutron stars or black holes. In these moments of collapse, the intense heat and pressure can create all the known elements to form gases and dust which may eventually combine to form new stars, new planets and, as on Earth, new life.

The image above is of the supernova remnant Cassiopeia A, approximately 10,000 light years away, from a once massive star that died in a supernova explosion that was first seen from Earth in 1690

With

Martin Rees Astronomer Royal, Fellow of Trinity College, Cambridge

Carolin Crawford Emeritus Member of the Institute of Astronomy and Emeritus Fellow of Emmanuel College, University of Cambridge

And

Mark Sullivan Professor of Astrophysics at the University of Southampton

Producer: Simon Tillotson

Episoder(1081)

Hegel's Philosophy of History

Hegel's Philosophy of History

Melvyn Bragg and guests discuss ideas of Georg Wilhelm Friedrich Hegel (1770 - 1831) on history. Hegel, one of the most influential of the modern philosophers, described history as the progress in th...

23 Jun 202252min

Comenius

Comenius

Melvyn Bragg and guests discuss the Czech educator Jan Amos Komenský (1592-1670) known throughout Europe in his lifetime under the Latin version of his name, Comenius. A Protestant and member of the U...

16 Jun 202256min

Tang Era Poetry

Tang Era Poetry

Melvyn Bragg and guests discuss two of China’s greatest poets, Li Bai and Du Fu, who wrote in the 8th century in the Tang Era. Li Bai (701-762AD) is known for personal poems, many of them about drinki...

9 Jun 202246min

The Davidian Revolution

The Davidian Revolution

Melvyn Bragg and guests discuss the impact of David I of Scotland (c1084-1153) on his kingdom and on neighbouring lands. The youngest son of Malcolm III, he was raised in exile in the Anglo-Norman co...

2 Jun 202250min

Early Christian Martyrdom

Early Christian Martyrdom

Melvyn Bragg and guests discuss the accounts by Eusebius of Caesarea (c260-339 AD) and others of the killings of Christians in the first three centuries after the crucifixion of Jesus. Eusebius was ...

26 Mai 202253min

Olympe de Gouges

Olympe de Gouges

Melvyn Bragg and guests discuss the French playwright who, in 1791, wrote The Declaration of the Rights of Woman and of the Female Citizen. This was Olympe de Gouges (1748-93) and she was responding ...

19 Mai 202249min

Homo erectus

Homo erectus

Melvyn Bragg and guests discuss one of our ancestors, Homo erectus, who thrived on Earth for around two million years whereas we, Homo sapiens, emerged only in the last three hundred thousand years. ...

12 Mai 202251min

Populært innen Historie

rss-dette-ma-aldri-skje-igjen
rss-katastrofe
henrettelsespodden
historier-som-endret-norge
historier-som-endret-verden
aftenposten-historie
rss-nadelose-nordmenn-gestapo
med-egne-oyne
rss-benadet
sektledere
rss-strid-de-norske-borgerkrigene
historiepodden
rss-frontkjemperne
rss-gamle-greier
rss-historiske-romanser-svik-drap-og-kjarlighet
taakeprat
liberal-halvtime
vare-historier
virkelig-grusomt
historiepodden-ww2