Never mind pronouncing it - does he know how to read it???

Double sun dogs from spaceweather.com...

The 'All Quiet' event Okay, sorry, clearly this is my fault. On the basis of the Flamsteed 'Who's bought new kit recently?' mantra, I stick my hand up...

UK space shot's tribute to Newton British astronaut Tim Peake has picked "Principia" to be the name of his mission into space next year. Read more:

I'm on holiday, it's sunny and I have a G&T in hand, so I probably shouldn't try to 'think' and be clever, but... If water survived on comets but...

On the exoplanets thread I think it would have helped if we could have raided the Open University toy box for some papier maché spherical models so we...

Wow. Thanks, Mike. To be honest, it was a much more whimsical question - but I'm astounded at the estimated mass/density. So little material scattered...

Ah! Okay, then. My mistake. I thought the formula was telling us what the probability is of observing - at any particular moment in time - a transit i...

Two universes: First universe: the orbital plane of every exoplanet system is completely random. Viewed from earth, some exosystems will show exopla...

42 It seems to work for rainbows, Tej!

Let me try this another way ("God, no! Make him stop!") Assume every star has an exoplanet, and that that exoplanet whizzes around its star every few...

The planet has to be in our line of sight. I think we're actually agreeing with each other, Brian! My original comment was "it has often struck me ...

raised to the power of x multiplied by s, i (the square root of -1) and pi. You know that feeling when you're running a marathon and you get to the 1...

Mike, I reckon you'd make a lot of money selling photographs like that. Then you'd be a sundog millionaire. I'll get my coat...

While walking home from an awards dinner late last night I suddenly realised that my conclusions above were arrant nonsense. The angular diameter of t...