Gravitational Waves Ushered in New Era of Astronomy in 2017

Enjoy
https://www.space.com/39162-gravitational-waves-new-era-of-astronomy-2017.html
The discovery of gravitational waves last year sent ripples through the entire field of physics. They confirmed that space does indeed behave as a substance, which can be stretched and squeezed, as predicted by Albert Einstein’s theory of general relativity. They also ushered in a new era of astronomy.
In 2017, scientists detected gravitational waves from an event that was also observed by telescopes: Around 130 million years ago, two neutron stars spiraled toward each other and fused together — a phenomenon known as a kilonova. The rapidly rotating stars whipped up gravitational ripples in space itself. On Aug. 17, the advanced Laser Interferometer Gravitational-Wave Observatory (LIGO) and advanced Virgo observatories on Earth detected those ripples. Because the waves were generated just as the stars merged, the scientists who detected them had enough time to alert astronomers of the light and radiation that would soon follow. [Related: The Greatest Space Science Stories of 2017]
Even small black holes emit gravitational waves when they collide
The Laser Interferometer Gravitational-Wave Observatory, or LIGO, can find black hole binaries — a pair of black holes that are bound by gravity — as they spin toward each other and violently merge into a single black hole. LIGO consists of two L-shaped detectors with 2.5-mile-long arms, one in Hanford, Wash., and the other in Livingston, La. When a gravitational wave passes through the detectors, squeezing one arm and stretching the other, a finely tuned system of lasers and mirrors inside the arms can pick up those infinitesimally tiny distortions.
Since finding its first black hole merger in September 2015, LIGO has announced the discovery of several more black hole mergers, as well as a merger of two neutron stars — some of which the European Virgo detector picked up as well.

 

***

17) Is Sir Isaac Newton’s “Law of Gravity” Just One Great Big 500 Yr. Old Lie?

18) How Did The Kings of Astronomy Get it So Wrong? Part I: Copernicus – Newton

19) How Did The Kings of Astronomy Get it So Wrong? Part II: Einstein and the Still Earth

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: