![Image convert and resize](https://loka.nahovitsyn.com/15.jpg)
![which type of star turns into a black hole which type of star turns into a black hole](https://www.sciencealert.com/images/2022/08/IllustrationOfBlackHoleJetAndBlueGiantStar.jpg)
The matter in a neutron star is so dense that atoms get crushed, resulting in the formation of neutrons. Neutron stars are so dense that an amount of matter comparable to the solar system is compressed to a diameter of about 20km. It’s important that the smaller masses were below 2.2 times the mass of the Sun, because this suggests these objects were neutron stars. The event on January 5 involved objects with respective masses of 8.9 and 1.9 times the mass of the Sun, and the merger on January 15 was between objects with 5.7 and a 1.5 times the mass of the Sun. In the new discoveries, the merging objects each had less than ten times the mass of the Sun. Now also a smaller, less sensitive, gravitational wave observatory in Italy, called the Virgo experiment, is frequently used as part of the telescope network. Since then, the sensitivity of the instrument has been improved. The merger detected in 2015 was between two comparatively massive black holes, each around 30 times the mass of the Sun. LIGO-Virgo / Frank Elavsky, Aaron Geller / Northwestern, Author provided (no reuse)ĭuring the first ever detected gravitational wave event in 2015, for which three physicists were awarded the Nobel prize in 2017, the distances between the mirrors in the two stations of the LIGO observatory, which are 4km (2.5 miles) apart, changed by about a thousandth of a trillionth of a millimetre. The masses of neutron stars and black holes seen through gravitational waves. The way to measure these waves is to monitor the distance between two otherwise fixed objects, because the gravitational wave will periodically change the extent of the space between these objects, as it passes. Waves of periodic compression and expansion are emitted. Relativity predicts that matter warps space (and time) and a collision between two compact objects like a black hole and a neutron star rapidly changes the compression and relaxation of the space in the vicinity of the objects. Similar to an inflated balloon, you can squeeze it one way and it expands in the perpendicular direction. The basic idea behind the theory of relativity is that space itself possesses a kind of elastic structure, even in the absence of any matter. Changing the distance between the mirrors by even a tiny fraction of a wavelength produces a measurable light signal. Two light waves are arranged so that the signals cancel each other out exactly. The measurement technique relies on the overlap of reflected laser light within the experiment.
![which type of star turns into a black hole which type of star turns into a black hole](https://www.universetoday.com/wp-content/uploads/2019/01/DwrPJvTW0AEUe6s-768x575.jpg)
In a gravitational wave observatory, the distance between two suspended mirrors is measured with a laser. Gravitational waves are distortions in space-time, predicted by Albert Einstein’s general theory of relativity.
![Image convert and resize](https://loka.nahovitsyn.com/15.jpg)