[/caption] Imagine a spinning black hole so colossal and so powerful that it kicks photons, the basic units of light,…
[/caption] One of the most interesting constants and challenges in physics is the speed of light. The speed of light…
[/caption] Many an alternative theory of gravity has been dreamt up in the bath, while waiting for a bus -…
[/caption] What is the speed of gravity? It's 299,792,458 m/s. Seem familiar? Yep, it's the speed of light (in a…
[/caption] Published in 1915, Einstein's theory of general relativity (GR) passed its first big test just a few years later,…
[/caption] This time it was the gravitational redshift part of General Relativity; and the stringency? An astonishing better-than-one-part-in-100-million! How did…
[/caption] Sirius B is the name of the fainter, smaller, less massive star in the Sirius binary system (the brighter,…
The event horizon of a black hole is the boundary ('horizon') between its 'outside' and its 'inside'; those outside cannot…