Gravitational waves

MIT Technology Review: Tidal forces carry the mathematical signature of gravitational waves

Stars are hot balls of plasma, but astronomers have now spotted a super strange one that may have a solid surface. Its intense magnetic field is strong enough to overcome its blistering temperatures and “freeze” its outer layers into a solid crust.

Evidence of gravitational waves may be in our reach by the end of the year, says scientist. Also; Pluto's small moons tumble in constant chaos, and Hubble detects the first intergalactic supernovae.

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The New Yorker wrote an article calledGravitational Waves Exist The Inside Story of How Scientists Finally Found ThemThe article describes how Professor Rainer Weiss idea to build a device sensitive enough to detect ripples in space-time became aprofessional obsession and a quest that spanned ahalfcentury This quest had a team of over 1000 scientists and engineers focused on the task

An infusion of cash is kicking off the next set of gravitational wave detectors, which will help physicists map the universe in richer detail.

When black holes merge strong gravitational waves are emitted. The graph shows a state-of-the-art comparison between waveforms of a black hole binary calculated according to two different techniques (top panel); the lower panel shows the final few cycles, including the merger of the two black holes. Image credit: UMD/AEI/Milde Marketing/ESO/NASA.

(Phys.org) —A strange stellar pair nearly 7,000 light-years from Earth has provided physicists with a unique cosmic laboratory for studying the nature of gravity. The extremely strong gravity of a massive neutron star in orbit with a companion white dwarf star puts competing theories of gravity to a test more stringent than any available before.

When you emit gravitational waves, they have to pass through the Universe. But do they gravitate, too?