Dark matter
Concept in cosmology
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We include updates on Neutrino, Axion, Lambda-CDM model, Primordial black hole, Vera Rubin, Modified Newtonian dynamics, Weakly interacting massive particle, Sterile neutrino, Navarro–Frenk–White profile, Massive compact halo object, MACS J0416.1-2403, Bullet Cluster, Axino, X17 particle, Alpha Magnetic Spectrometer, Neutralino ... and more.
| 2025 |
Vera Rubin
Will be honored on a U.S. quarter as part of the American Women quarters program.
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| January 2025 |
ARRAKIHS
Spanish company Added Value Solutions (AVS) won a contract for the initial phases of the project, including preliminary spacecraft design and technology risk reduction.
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| January 2025 |
ARRAKIHS
Spanish company Added Value Solutions (AVS) and a Belgian subsidiary of Redwire won contracts for initial project phases, including preliminary spacecraft design and technology risk reduction.
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| 2024 |
Primordial black hole
A review by Bernard Carr and colleagues concluded that primordial black holes formed in the quantum chromodynamics (QCD) epoch before 10–5 seconds after the Big Bang, resulting in a mass distribution with distinct bumps, most prominently around one solar mass.
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| 2024 |
Dwarf galaxy problem
Discoveries indicate that the number of satellite galaxies around the Milky Way might be around 500, challenging previous simulations that predicted fewer galaxies.
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| 2024 |
Dwarf galaxy problem
Construction of the Vera C. Rubin Observatory is completed, which is expected to conduct wide field surveys to help scientists better understand the dwarf galaxy problem through future sky observations.
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| 2024 |
Modified Newtonian dynamics
A study claimed that the universe's earliest galaxies formed and grew too rapidly to be explained by the Lambda-CDM model, but such rapid growth was predicted by MOND theory.
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| September 2024 |
Self-interacting dark matter
A follow-up study proposed that both SIDM and fuzzy cold dark matter might provide a solution to the 'final-parsec problem'.
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| July 2024 |
Self-interacting dark matter
A scientific study was published proposing that self-interacting dark matter (SIDM) could solve the 'final-parsec problem' in astronomical research.
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| June 2 2024 |
Vera Rubin
Nvidia announced their next generation of data center accelerators would be named after her, with the CPU named Vera and GPU named Rubin.
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| April 2024 | Extensive cosmic ray dataset discussed at the APS April meeting, challenging existing theoretical models of the cosmos. |
| March 2024 |
ARRAKIHS
ESA published a call for the definition, development, and operation of the mission.
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| 2023 |
Dark galaxy
Nube, a potential dark galaxy, was discovered through deep optical imagery analysis in the Stripe 82 region. This discovery is significant as Nube is classified as an 'almost dark galaxy' due to its extremely low surface brightness.
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| 2023 |
Modified Newtonian dynamics
A research study concluded that cold dark matter cannot adequately explain galactic rotation curves, while MOND provides a more comprehensive explanation.
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| 2023 |
Modified Newtonian dynamics
A study measured the acceleration of 26,615 wide binaries within 200 parsecs, demonstrating systematic deviations from Newtonian dynamics and conformity with MOND (AQUAL) predictions. The results remain disputed among researchers.
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| November 2023 |
ARRAKIHS
The ARRAKIHS consortium successfully passed the mission definition review of the project.
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| November 26 2023 |
Primordial black hole
First evidence of an overmassive black hole galaxy was reported, found in studies of UHZ1 using the Chandra X-ray Observatory and James Webb Space Telescope, demonstrating an alternative black hole formation method.
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| 2022 | CERN Axion Solar Telescope (CAST) concludes its operational period after nearly two decades of research into solar axions and Axion-Like Particles. |
| 2022 |
Dwarf galaxy problem
Density profile studies suggested that dwarf galaxies have a constant-density core, which contradicts dark matter simulations that predicted lower baryon density.
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| 2022 |
Modified Newtonian dynamics
Kroupa et al. published a study of open star clusters, arguing that asymmetry in tidal tails and cluster lifetimes are inconsistent with Newtonian dynamics but consistent with MOND theory.
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| 2022 |
Modified Newtonian dynamics
A survey of dwarf galaxies from the Fornax Deep Survey (FDS) catalogue was published, with astronomers and physicists concluding that observed deformations of dwarf galaxies in the Fornax Cluster and the lack of low surface brightness dwarfs towards its centre are incompatible with ΛCDM expectations but consistent with MOND theory.
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| November 2022 |
DAMA/NaI
New results from COSINE-100 experiment after 1.7 years of data collection failed to replicate the signal originally reported by DAMA.
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| November 2022 |
ARRAKIHS
European Space Agency (ESA) selected ARRAKIHS as its second F-class mission.
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| September 2022 |
Primordial black hole
Researchers proposed primordial black holes as a potential explanation for the unexpected very large early galaxies discovered by the James Webb Space Telescope (JWST).
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| August 2022 |
DAMA/NaI
COSINE-100 applied an analysis method similar to DAMA/LIBRA and found a similar annual modulation, suggesting the original DAMA signal could be a statistical artifact.
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| 2021 |
CERN Axion Solar Telescope
First results from the RADES detector were published, reporting no significant axion signal detected above the noise background during the 2018-2021 period.
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| 2021 |
Modified Newtonian dynamics
Unnamed researchers proposed a new relativistic model of MOND that is compatible with cosmic microwave background observations.
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| September 2021 |
Primordial black hole
The NANOGrav collaboration announced detection of a low-frequency signal potentially associated with gravitational waves and primordial black holes.
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| May 2021 |
DAMA/NaI
ANAIS dark matter direct detection experiment, after 3 years of data collection at the Canfranc Underground Laboratory in Spain, found no evidence of annual modulation in 112.5 kg of NaI(Tl) crystals, rendering their results incompatible with DAMA/NaI and DAMA/LIBRA.
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| 2020 | A measurement of a unique MOND (Modified Newtonian Dynamics) effect was recorded, offering another alternative explanation to dark matter. |
| 2020 |
Modified Newtonian dynamics
A group of astronomers analyzed data from the Spitzer Photometry and Accurate Rotation Curves (SPARC) sample and galaxy catalogs, finding statistically significant evidence of violations of the strong equivalence principle in weak gravitational fields near rotationally supported galaxies. Their findings were consistent with Modified Newtonian Dynamics (MOND) and inconsistent with the Lambda-CDM cosmological model.
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| November 6 2020 |
Vera Rubin
A satellite named ÑuSat 18 or 'Vera' was launched into space.
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| October 2020 |
Light dark matter
SENSEI experiment published its most recent results on ruling out possible mass ranges of dark matter below 1 GeV using silicon detector and CCD technology.
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| January 25 2020 | Fourth spacewalk conducted to repair the Alpha Magnetic Spectrometer (AMS). Astronauts performed leak checks on the cooling system, identified and fixed a leak in one of the cooling lines. The mission lasted 6 hours and 16 minutes. Preliminary testing showed the AMS was responding as expected, and the tracker detector began collecting science data shortly after. |
| 2019 | Observations of Andromeda showed a lack of microlensing effects, suggesting tiny black holes do not exist in significant numbers. |
| 2019 | A study using NASA's Fermi Gamma-ray Space Telescope discovered a halo around the nearby pulsar Geminga, suggesting it could be responsible for up to 20% of high-energy positrons seen by AMS-02. |
| December 20 2019 |
Vera Rubin
The Large Synoptic Survey Telescope was renamed the Vera C. Rubin Observatory in recognition of her contributions to dark matter research and advocacy for women in science.
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| December 2 2019 | Third spacewalk conducted to upgrade the Alpha Magnetic Spectrometer's cooling system. Astronauts installed the upgraded tracker thermal pump system (UTTPS), completed power and data cable connections, and connected eight cooling lines. They also installed an insulating blanket on the nadir side of the AMS. The spacewalk lasted 6 hours and 2 minutes, with the flight control team on Earth confirming power and data reception. |
| November 2019 | After four years of planning, special tools and equipment were sent to the International Space Station to conduct in-situ repairs of the Alpha Magnetic Spectrometer, requiring four spacewalks and including the replenishment of liquid carbon dioxide coolant. |
| November 22 2019 | Astronauts Parmitano and Morgan conducted a spacewalk to repair the Alpha Magnetic Spectrometer, cutting eight stainless steel tubes and preparing for a new cooling system installation. The spacewalk lasted 6 hours and 33 minutes. |
| November 15 2019 | First spacewalk conducted for the Alpha Magnetic Spectrometer (AMS). Astronauts performed multiple tasks including removing the debris shield, installing handrails, removing zip ties, and disassembling protective covers. The spacewalk lasted 6 hours and 39 minutes, with astronauts Parmitano and Morgan working together to prepare and modify the AMS equipment. |
| October 2019 |
Primordial black hole
Derek Inman and Yacine Ali-Haïmoud published research discovering that nonlinear velocities from structure formation are too small to significantly affect constraints from cosmic microwave background anisotropies.
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| September 2019 |
Primordial black hole
James Unwin and Jakub Scholtz proposed the existence of a primordial black hole with 5-15 Earth masses in the extended Kuiper Belt to explain potential orbital anomalies.
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| August 2019 |
Primordial black hole
A study was published exploring the possibility that all dark matter could be composed of asteroid-mass primordial black holes with masses between 3.5 × 10−17 – 4 × 10−12 solar masses.
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| 2018 |
Spherical collapse model
Descjacques et al. published a study referencing the proto-halo concept in the early Universe, providing a key reference for the simplest halo formation scenario involving a spherically overdense patch.
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| 2018 |
CERN Axion Solar Telescope
RADES (Relic Axion Dark Matter Exploratory Setup) began searching for axion-like dark matter, becoming the first detector to search for axions above 30 μeV.
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| December 2018 |
DAMA/NaI
COSINE-100 collaboration published results in Nature, concluding that their findings rule out WIMP–nucleon interactions as the cause of the annual modulation observed by the DAMA collaboration.
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| December 2018 | Funding for the International Space Station was announced to be extended to 2030, ensuring continued operational support for the AMS-02 instrument. |
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This contents of the box above is based on material from the Wikipedia articles Dark matter, DAMA/NaI, Primordial black hole, Self-interacting dark matter, Vera Rubin, Alpha Magnetic Spectrometer, Modified Newtonian dynamics, Light dark matter, Spherical collapse model, Dwarf galaxy problem, CERN Axion Solar Telescope, ARRAKIHS, Dark galaxy, Mirror matter & International Axion Observatory, which are released under the Creative Commons Attribution-ShareAlike 4.0 International License.