gravity

What is the cosmological constant?
In the last issue Lewis Dartnell explained how chaos on the brain is not only unavoidable but also beneficial. Now he tells us why the same is true for our solar system and sends us on a journey that has been travelled by comets and spacecraft.
Extrasolar planets have been grabbing the headlines

Two people who get on well together can often find their relationship destabilised by the arrival of a third into their orbit.

In issue 29 of Plus, we heard how a simple mathematical equation became the subject of a debate in the UK parliament. Chris Budd and Chris Sangwin continue the story of the mighty quadratic equation.
Did you know that every instant, gravity waves from outer space are stretching and squeezing you - and everyone and everything else in the universe? Learning more about this mysterious radiation will help us to probe the structure and origins of the universe, explains Anita Barnes.
Solving the mathematics of drapery may help change the way we shop.
Scientists have for the first time measured the speed of gravity and tested Einstein's assumption - or have they?
Plus is very proud to present Professor Stephen Hawking's own Birthday Symposium address.
What happens when one black hole meets another? Professor Kip Thorne shows us how to eavesdrop on these cosmic events by watching for telltale gravitational waves.
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