astronomy
Now imagine a white hole – a black hole’s time-reversed twin…
Just as you can enter a black hole without leaving it, you can exit a white hole without entering it – but first you must understand what black holes really are
Circular arguments
Aristotle had long proved that the Earth was spherical, and even the illiterate masses of early medieval Europe were aware of the fact, says James Hannam
Heavenly beauty: Doppelmayr’s Atlas Coelestis
It seems something of a disservice to a work of this seriousness to say how beautiful it is, but that…
An orange or an egg? Determining the shape of the world
Simon Winchester follows the volatile French mission to Ecuador in 1735 to determine the shape of the Earth
Christiaan Huygens – hero of time and space
This book, soaked like the Dutch Republic itself ‘in ink and paint’, is enchanting to the point of escapism. The…
Gazing heavenwards: the medieval monks who mapped the planetary motions
We can probably blame George and Ira Gershwin. It was that brilliant duo who, in 1937, penned the memorable lyric…
Believing in big data is equivalent to believing in the stars
Look up at the sky on a clear night. This is not an astrological game. (Indeed, the experiment’s more impressive…
Earth dying in five billion years I can deal with, but not a world-weary Brian Cox
When you see the opening caption ‘4.6 billion years ago’, it’s a pretty safe bet that you’re watching a programme…
The only thing that baffled Einstein was his own popularity
On 6 November 1919, at a joint meeting of the Royal Astronomical Society and the Royal Society, held at London’s…
Universal appeal
Yet another sign that we are living in very strange times: a pair of celebrities, their names made by TV,…
New light on the Sun
The Sun is a star that many astronomers assume is only worth studying because of its averageness; it’s middle-aged and…
Why it would be absurd to sell off Radio 2 - even if it could do with a refresh
The idea that Radio 2 should be sold off by the BBC to a commercial rival is as nonsensical as…
Pluto’s moon Charon is secretly a Charlene
‘What about the moon Tracey?’ asked my husband facetiously when an astronomer on the wireless, talking of Pluto’s moon Charon,…
White dwarfs and neutron stars — stepping-stones to the black hole
The idea of black holes sounds so quintessentially modern and 20th-century that it may come as a surprise to learn…
Moving heaven and earth: Galileo’s subversive spyglass
We live in an age of astronomical marvels. Last year Europe’s Rosetta spacecraft made a daring rendezvous with the comet…
