General relativity
Theory of gravitation as curved spacetime
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We include updates on Expansion of the universe, Wormhole, White hole, Event horizon, Einstein field equations, Redshift, Quantum gravity, Shape of the universe, Gravitational wave, Gravitational singularity, Cosmological constant, Gravity assist, Spaghettification, Gravitational time dilation, Anti-gravity, Friedmann equations ... and more.
| June 28 2023 |
Gravitational wave background
North American Nanohertz Observatory for Gravitational Waves collaboration announced evidence for a Gravitational Wave Background (GWB), with supporting observations from EPTA, Parkes Observatory, and Chinese Pulsar Timing Array (CPTA). This provided the first measurement of the Hellings-Downs curve, a key indicator of gravitational wave origin.
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| May 16 2020 |
Talk:September
User Xboxsponge15 suggested removing bullet points near flower images on the Wikipedia page for September, noting they look strange when placed next to images.
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| 2018 |
Shape of the universe
Planck mission released final results showing the cosmological curvature parameter, providing evidence consistent with a flat universe.
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| February 11 2016 |
Gravitational wave background
LIGO and Virgo collaborations officially announced the first direct detection and observation of gravitational waves from the September 2015 event.
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| September 2015 |
Gravitational wave background
First direct detection of gravitational waves from a collision of two black holes, marking a significant milestone in gravitational wave research.
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| June 2015 |
Redshift
Astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy, potentially identifying early universe stars that began production of chemical elements heavier than hydrogen, crucial for later planet and life formation.
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This contents of the box above is based on material from the Wikipedia articles Gravitational wave background, Talk:September, Redshift & Shape of the universe, which are released under the Creative Commons Attribution-ShareAlike 4.0 International License.