Current Affairs 5 July 2021 – IAS Current Affairs
Current Affairs 5 July 2021 focuses on Prelims-Mains perspective. Major events are :
New Source Of Gravitational Waves Detected
Source : The Hindu
Science and Technology
What is discuss under New Source Of Gravitational Waves Detected ?
- What is a Gravitational Wave ?
- About New Source Of Gravitational Waves
Why in News ?
Scientists have for the first time detected gravitational waves ripples in the fabric of space-time produced by the collision of a neutron star and a black hole.
Key Facts
- The finding confirms that there are systems consisting of a neutron star and a black hole.
Photo by David Kopacz from Pexels - It will help answer many questions about the cosmos, from star formation to the expansion rate of our universe.
- What is a Gravitational Wave ?
- Gravitational waves are produced when celestial objects collide and the ensuing energy creates ripples in the fabric of space-time which carry all the way to detectors on Earth.
- The reverberations from the two celestial objects were picked up using a global network of gravitational wave detectors, the most sensitive scientific instruments ever built.
- This is the first time scientists have seen gravitational waves from a neutron star and a black hole.
- These detection confirm that there are populations of binary systems consisting of a neutron star and a black hole.
- The first ever direct detection of gravitational waves in 2015.
- Astronomers have predicted that this type of system a black hole and neutron star merger could exist, but without any compelling observational evidence.
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