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Posts Tagged "general relativity"

Life, Unbounded

Gravitational Mesolensing And The Hunt For Exoplanets

It's full of lenses...

When astronomers talk about methods for finding exoplanets the list is relatively short. There is the radial velocity, or ‘wobble’ technique, which senses the motion of a star around a common center-of-mass with its planets. There is the transit technique, employed with great success by NASA’s Kepler mission, and there are direct imaging and phase-photometry [...]

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Observations

Merging Black Holes May Be Detectable by 2017

LIGO gravitational wave observatory

In his indispensable 1994 book Black Holes and Time Warps, physicist Kip Thorne wrote of the tantalizing discoveries that awaited in the coming century. In particular, the existence of gravitational waves—ripples in the very fabric of space and time caused by the motion, and especially the collision, of extremely massive objects—might soon graduate from theoretical [...]

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The Curious Wavefunction

“The Perfect Theory”: The story of general relativity, and what makes something a science

Until the development of radio astronomy - exemplified here by the Very Large Array telescope in New mexico - general relativity was considered more speculation than fact (Image: NRAO)

Pedro Ferreira’s book “The Perfect Theory: A Century of Geniuses and the Battle over General Relativity” essentially tells us what other people did with Einstein’s general theory of relativity after he developed it. While one chapter is devoted to Einstein’s hard struggle with learning the non-Riemannian geometry and building the field equations that define the [...]

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