Cosma Home > Communication > Knowledge > Realm > Physical




Realm Cosmological, Physical, Terrestrial, Anthropological, Mystical


Universe Astronomical Instrument
Galaxy Milky Way, Andromeda
Planetary System Star, Brown Dwarf, Planet, Moon

Solar System Sun
Terrestrial Planet Mercury, Venus, Earth (Moon), Mars
Asteroid Belt Ceres, Vesta
Jovian Planet Jupiter, Saturn, Uranus, Neptune
Trans-Neptunian Object
Kuiper Belt Pluto, Haumea, Makemake
Scattered Disc Eris, Sedna, Planet X
Oort Cloud Etc. Scholz’s Star
Small Body Comet, Centaur, Asteroid

Physical Laws (Constants) Relativity
Matter Molecule, Atom (Periodic Table), Particle
Force Gravity, Electromagnetism (Light, Color)


These are organized by a classification scheme developed exclusively for Cosma. More…



Physics Central: Physics in Action (American Physical Society)
Physical Sciences Subject Guide (Library of Congress)
Introductory Physics Science Tracer Bullet (Library of Congress)
Physics Resources (Library of Congress)
Physics Internet Resources (Library of Congress)

Physical Science Subject Primer (National Network of Libraries of Medicine)
Physics Subject Primer (National Network of Libraries of Medicine)

Physics World

Physics Center (Martindale’s Reference Desk)
Physics Databases & Periodic Tables (Martindale’s Reference Desk)
CRC Handbook of Chemistry and Physics Online (99th Edition)

Natural and Physical Sciences Portal (Wikipedia)
Physical Sciences Portal (Wikipedia)
Physics Portal (Wikipedia)


Physical : (a) of or relating to physics (b) characterized or produced by the forces and operations of physics (c) having material existence : perceptible especially through the senses and subject to the laws of nature — Webster

OneLook, Free Dictionary, Wiktionary, Urban Dictionary

Realm : kingdom, sphere, domain — Webster

OneLook, Free Dictionary, Wiktionary, Urban Dictionary

Physical Realm : kingdom, sphere, or domain of things that have material existence and are perceptible, especially those things perceptible through the senses and subject to the laws of nature — M.E.Hopper


Physical universe In religion and esotericism, the term “physical universe” or “material universe” is used to distinguish the physical matter of the universe from a proposed spiritual or supernatural essence. — Wikipedia

Eric Weisstein’s World of Physics (ScienceWorld, Wolfram Research)
Encyclopædia Britannica


Outline of Physical Science (Wikipedia)
Outline of Physics (Wikipedia)


Physics (Wolfram Alpha)


Philosophical research online: Philosophy of Physical Science (PhilPapers)


Physical science is a branch of natural science that studies non-living systems, in contrast to life science. It in turn has many branches, each referred to as a “physical science”, together called the “physical sciences”. However, the term physical creates an unintended, somewhat arbitrary distinction, since many branches of physical science also study biological phenomena and branches of chemistry, such as organic chemistry. — Wikipedia

Encyclopædia Britannica

Physics is the natural science that studies matter and its motion and behavior through space and time and that studies the related entities of energy and force. Physics is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves. — Wikipedia

Encyclopædia Britannica

Physics Center (Martindale’s Reference Desk)
Encyclopedia of Physics



SciShow Physics (YouTube Channel)

Center for History of Physics (American Institute of Physics)
History of Physics Exhibits (American Institute of Physics)
All Nobel Prizes in Physics (Nobel Foundation)
Physics History and Terminology (Eric Weisstein’s World of Physics, Wolfram Research)


WorldCat, Library of Congress, UPenn Online Books, Open Library



Crash Course Kids (YouTube Channel)

The Cheerios effect (TED Ed)
Physical Sciences (TED Ed)

Minute Physics (YouTube Channel)

The Physics Classroom (Tom Henderson)
DC Physics Help for Students


Crash Course Physics (YouTube Channel)

How Things Work: An Introduction to Physics (Coursera)
Physical Science Courses (Coursera)
Physics Courses (MIT Opencourseware)
Einstein, Oppenheimer, Feynman: Physics in the 20th Century (MIT Opencourseware)
OER Commons: Open Educational Resources



Careers in Physical Sciences (Physics World)
Careers in Physics (
General Physics (Ask an Astronomer, Cornell University)


American Physical Society (APS)
European Physical Society (EPS)
American Institute of Physics (AIP)


Conference Alerts Worldwide (Conal)

News E-Print Archive (Cornell University)
AAAS EurekaAlert, Nature, Physics World
Science News, Science Daily




Physics (It’s Okay To Be Smart, YouTube Channel)


What if?

What If? Answering your hypothetical questions with physics, every Tuesday.

  • Earth-Moon Fire Pole
    by xkcd on May 21, 2018 at 12:00 am

    <article class="entry"> <a href="//"><h1>Earth-Moon Fire Pole</h1></a> <p id="question">My son (5y) asked me today: If there were a kind of a fireman&#39;s pole from the Moon down to the Earth, how long would it take to slide all the way from the Moon to the Earth?</p> <p id="attribute">Ramon Schönborn, Germany</p> <p>First, let&#39;s get a few things out of the […]

  • Electrofishing for Whales
    by xkcd on March 9, 2017 at 12:00 am

    <article class="entry"> <a href="//"><h1>Electrofishing for Whales</h1></a> <p id="question">I used to work on a fisheries crew where we would use an electro-fisher backpack to momentarily stun small fish (30 - 100 mm length) so we could scoop them up with nets to identify and measure them. The larger fish tended to be stunned for slightly longer because of their larger surface area but I don&#39;t […]

  • Toaster vs. Freezer
    by xkcd on February 28, 2017 at 12:00 am

    <article class="entry"> <a href="//"><h1>Toaster vs. Freezer</h1></a> <p id="question">Would a toaster still work in a freezer?</p> <p id="attribute">—<a href="">My Brother, My Brother and Me</a>, <a […]

  • Coast-to-Coast Coasting
    by xkcd on February 8, 2017 at 12:00 am

    <article class="entry"> <a href="//"><h1>Coast-to-Coast Coasting</h1></a> <p id="question">What if the entire continental US was on a decreasing slope from West to East. How steep would the slope have to be to sustain the momentum needed to ride a bicycle the entire distance without pedaling?</p> <p id="attribute">—Brandon Rooks</p> <p>Too steep to actually build, […]

  • Hide the Atmosphere
    by xkcd on January 30, 2016 at 12:00 am

    <article class="entry"> <a href="//"><h1>Hide the Atmosphere</h1></a> <p id="question">Earth’s atmosphere is really thin compared to the radius of the Earth. How big a hole do I need to dig before people suffocate?</p> <p id="attribute">—Sam Burke</p> <p>The idea here is straightforward: When you dig a hole in the ground, the hole fills up with air.<span […]

Performing Arts


OEDILF: The Omnificent English Dictionary In Limerick Form


Song Lyrics



EurekAlert! - Chemistry, Physics and Materials Sciences The premier online source for science news since 1996. A service of the American Association for the Advancement of Science.

  • Children carry evidence of toxins from home...
    on February 17, 2019 at 5:00 am

    (Duke University) Children living in homes with all vinyl flooring or flame-retardant chemicals in the sofa have significantly higher concentrations of potentially harmful semi-volatile organic compounds (SVOCs) in their blood or urine than children from homes where these materials are not present, according to new Duke University-led research. The researchers presented their findings Feb. 17 at the annual meeting of the American Association for the Advancement of Science in Washington, D.C. […]

  • Engineered metasurfaces reflect waves in unusual...
    on February 16, 2019 at 5:00 am

    (Aalto University) Researchers at Aalto University have developed new metasurfaces for the arbitrary manipulation of reflected waves, essentially breaking classical reflection law to engineer it at will. […]

  • Tiny fibers create unseen plastic pollution
    on February 16, 2019 at 5:00 am

    (Penn State) While the polyester leisure suit was a 1970s mistake, polyester and other synthetic fibers like nylon are still around and are a major contributor to the microplastics load in the environment, according to a Penn State materials scientist, who suggests switching to biosynthetic fibers to solve this problem. […]

  • How to feed the world by 2050? Recent...
    on February 16, 2019 at 5:00 am

    (Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign) Recent advances to address hunger through agricultural discovery will be highlighted at this year's annual meeting of the AAAS. Session speaker and University of Illinois professor Donald Ort will discuss the global food security challenge and a recent breakthrough in Science that boosted crop growth by 40 percent by creating a shortcut for a glitch that plagues most food crops. […]

  • Large-scale window material developed for PM2.5...
    on February 16, 2019 at 5:00 am

    (University of Science and Technology of China) A research team from University of Science and Technology of China develops a simple and economical process to fabricate large-scale flexible smart windows. […]

  • Solid-state catalysis: Fluctuations clear the way
    on February 15, 2019 at 5:00 am

    (Ludwig-Maximilians-Universität München) Ludwig-Maximilian-Universitaet chemists have identified a mechanism that allows molecules to diffuse rapidly on the already crowded surface of a solid-state catalyst - an important capability, especially for efficient catalysis under industrial conditions. […]

  • Spare 10 minutes to make science leap forward
    on February 15, 2019 at 5:00 am

    (Diamond Light Source) Today sees the launch of an innovative Citizen Science Project by Diamond Light Source, which uses a crowdsourcing model to call on people of all ages around the world to help train AI to identify viruses. Visit to learn mor […]

  • Winning Science's annual 'Dance Your Ph.D.'...
    on February 15, 2019 at 5:00 am

    (American Association for the Advancement of Science) Scientific research can be a lonely pursuit. And for Pramodh Senarath Yapa, even the subject of his research is lonely: singleton electrons wandering through superconducting material. Six weeks of choreography and songwriting later, Yapa scooped the 2018 'Dance Your Ph.D.' contest. The judges -- a panel of world-renowned artists and scientists -- chose Yapa's swinging electron dance from 50 submissions based on both artistic and scientific […]

  • A nearby river of stars
    on February 15, 2019 at 5:00 am

    (Astronomy & Astrophysics) Astronomy & Astrophysics publishes the work of researchers from the University of Vienna, who have found a river of stars, a stellar stream in astronomical parlance, covering most of the southern sky. The stream is relatively nearby and contains at least 4000 stars that have been moving together in space since they formed, about 1 billion years ago. […]

  • Development of Pharmaceutical Agent For The...
    on February 15, 2019 at 5:00 am

    (Bentham Science Publishers) Frontiers in Clinical Drug Research -- Diabetes and Obesity is an eBook series that brings updated reviews to readers interested in advances in the development of pharmaceutical agents for the treatment of two metabolic diseases -- diabetes and obesity. […]

Physics News - Physics News, Material Sciences, Science News, Physics provides the latest news on physics, materials, nanotech, science and technology. Updated Daily.

  • Researchers discover anti-laser masquerading as...
    on February 15, 2019 at 4:10 pm

    Researchers at Duke University have discovered that a perfect absorber of electromagnetic waves they described in a 2017 paper can easily be tweaked into a sort of "time-reversed laser" known as a coherent perfect absorber (CPA). […]

  • Environmental noise found to enhance the...
    on February 15, 2019 at 3:00 pm

    A team of researchers affiliated with several institutions in Austria and Germany has shown that introducing environmental noise to a line of ions can lead to enhanced transport of energy across them. In their paper published in Physical Review Letters, the researchers describe their experiments and why they believe their findings will be helpful to other researchers. […]

  • Laser pulses light the way to tuning topological...
    on February 15, 2019 at 2:19 pm

    Scientists at the U.S. Department of Energy's Ames Laboratory have discovered a means of controlling the surface conductivity of a three-dimensional (3-D) topological insulator, a type of material that has potential applications in spintronic devices and quantum computing. […]

  • CMS gets first result using largest-ever LHC data...
    on February 15, 2019 at 1:10 pm

    Just under three months after the final proton–proton collisions from the Large Hadron Collider (LHC)'s second run (Run 2), the CMS collaboration has submitted its first paper based on the full LHC dataset collected in 2018 – the largest sample ever collected at the LHC – and data collected in 2016 and 2017. The findings reflect an immense achievement, as a complex chain of data reconstruction and calibration was necessary to be able to use the data for analysis suitable for a […]

  • Spintronics by 'straintronics': Switching...
    on February 15, 2019 at 1:00 pm

    Switching magnetic domains in magnetic memory normally requires magnetic fields generated by electrical currents, hence requiring large amounts of electrical power. Now, teams from France, Spain and Germany have demonstrated the feasibility of another approach at the nanoscale: "We can induce magnetic order on a small region of our sample by employing a small electric field instead of using magnetic fields," Dr. Sergio Valencia, HZB, says. […]

  • Shaping light lets 2-D microscopes capture 4-D...
    on February 14, 2019 at 7:11 pm

    Rice University researchers have added a new dimension to their breakthrough technique that expands the capabilities of standard laboratory microscopes. […]

  • Gravitational waves will settle cosmic conundrum
    on February 14, 2019 at 4:00 pm

    Measurements of gravitational waves from approximately 50 binary neutron stars over the next decade will definitively resolve an intense debate about how quickly our universe is expanding, according to findings from an international team that includes University College London (UCL) and Flatiron Institute cosmologists. […]

  • Merging neutron stars: How cosmic events give...
    on February 14, 2019 at 12:24 pm

    The opportunity to measure the gravitational waves of two merging neutron stars could offer answers to some of the fundamental questions about the structure of matter. At the extremely high temperatures and densities in the merger, scientists have conjectured a phase transition in which neutrons dissolve into their constituent quarks and gluons. In the current issue of Physical Review Letters, two international research groups report on their calculations of what the signature of such a phase […]

  • Running an LED in reverse could cool future...
    on February 13, 2019 at 8:22 pm

    In a finding that runs counter to a common assumption in physics, researchers at the University of Michigan ran a light emitting diode (LED) with electrodes reversed in order to cool another device mere nanometers away. […]

  • Research team develops a high-performance quantum...
    on February 13, 2019 at 8:18 pm

    Ten years into the future. That's about how far UC Santa Barbara electrical and computer engineering professor John Bowers and his research team are reaching with the recent development of their mode-locked quantum dot lasers on silicon. It's technology that not only can massively increase the data transmission capacity of data centers, telecommunications companies and network hardware products to come, but do so with high stability, low noise and the energy efficiency of silicon photonics. […]

Nature Physics - Issue - science feeds Nature Physics offers a unique mix of news and reviews alongside top-quality research papers. Published monthly, in print and online, the journal reflects the entire spectrum of physics, pure and applied.

  • Spin–phonon interactions in silicon carbide...
    by Samuel J. Whiteley on February 11, 2019 at 12:00 am

    Spin–phonon interactions in silicon carbide addressed by Gaussian acousticsSpin–phonon interactions in silicon carbide addressed by Gaussian acoustics, Published online: 11 February 2019; doi:10.1038/s41567-019-0420-0The authors use surface acoustic waves, focused in a Gaussian geometry, to manipulate the spin state of divacancy defects in silicon carbide via mechanical driving. They demonstrate that shear strain is important in controlling the spin transitions. […]

  • Axial-field-induced chiral channels in an...
    by Valerio Peri on February 11, 2019 at 12:00 am

    Axial-field-induced chiral channels in an acoustic Weyl systemAxial-field-induced chiral channels in an acoustic Weyl system, Published online: 11 February 2019; doi:10.1038/s41567-019-0415-xAxial fields couple to the states of different chiralities with opposite signs. In an acoustic Weyl system, the implementation of such fields induces chiral Landau levels, which is now observed experimentally. […]

  • Proton superfluidity and charge radii in...
    by A. J. Miller on February 11, 2019 at 12:00 am

    Proton superfluidity and charge radii in proton-rich calcium isotopesProton superfluidity and charge radii in proton-rich calcium isotopes, Published online: 11 February 2019; doi:10.1038/s41567-019-0416-9Spectral study on 36,37,38Ca isotopes and calculations based on density functional theory reveal the interplay between charge radii and nucleonic pairing correlations. […]

  • Quantum error correction and universal gate set...
    by L. Hu on February 11, 2019 at 12:00 am

    Quantum error correction and universal gate set operation on a binomial bosonic logical qubitQuantum error correction and universal gate set operation on a binomial bosonic logical qubit, Published online: 11 February 2019; doi:10.1038/s41567-018-0414-3Repeated error correction creates a logical qubit encoded in the hybrid state of a superconducting circuit and a bosonic cavity, which is shown to be fully controllable under a universal single-qubit gate set. […]

  • Efficient topological materials discovery using...
    by Feng Tang on February 11, 2019 at 12:00 am

    Efficient topological materials discovery using symmetry indicatorsEfficient topological materials discovery using symmetry indicators, Published online: 11 February 2019; doi:10.1038/s41567-019-0418-7Symmetry labels of materials under certain space groups can be used to indicate their band topology. Integrating that into first-principles band-structure calculations, new topological materials with a diversity of topological phenomena are discovered. […]

  • Selection mechanism at the onset of active...
    by Berta Martínez-Prat on February 4, 2019 at 12:00 am

    Selection mechanism at the onset of active turbulenceSelection mechanism at the onset of active turbulence, Published online: 04 February 2019; doi:10.1038/s41567-018-0411-6Experiments on microtubule-based nematics, together with active gel theory, suggest that the length scale associated with active turbulence is selected at its onset—balancing activity with the stabilizing effects of nematic elasticity and geometry. […]

  • Turbulent beginnings
    by Seth Fraden on February 4, 2019 at 12:00 am

    Turbulent beginningsTurbulent beginnings, Published online: 04 February 2019; doi:10.1038/s41567-019-0439-2An inspired experimental approach sheds light on the formation of active turbulence in a system of microtubules and molecular motors. The emergent scaling behaviour takes us a step closer to understanding how activity begets turbulence. […]

  • Scaling behaviour in steady-state contracting...
    by Maya Malik-Garbi on February 4, 2019 at 12:00 am

    Scaling behaviour in steady-state contracting actomyosin networksScaling behaviour in steady-state contracting actomyosin networks, Published online: 04 February 2019; doi:10.1038/s41567-018-0413-4Actomyosin networks with rapid turnover self-organize within droplets, forming a dynamic steady-state with persistent flows. The networks exhibit homogeneous, density-independent contraction, implying that active stress scales with viscosity. […] news Latest news from

    Feed has no items.

    Matter & Energy News -- ScienceDaily Detectors and electronics. Learn about every sort of detector, radar system and more from leading research institutes around the world.

    • Engineered metasurfaces reflect waves in unusual...
      on February 16, 2019 at 2:45 pm

      Researchers have developed new metasurfaces for the arbitrary manipulation of reflected waves, essentially breaking classical reflection law to engineer it at will. […]

    • Graphene-based wearables for health monitoring,...
      on February 16, 2019 at 12:25 am

      Scientists have developed dozens of new graphene-based prototypes. These technologies aim to turn mobile phones into life saving devices. […]

    • Lithium-air batteries can store energy for cars,...
      on February 15, 2019 at 6:59 pm

      Growth in the offer of renewable energy sources will mean increased demand for devices optimal for energy storing. […]

    • Improved RNA data visualization method gets to...
      on February 14, 2019 at 9:11 pm

      Like going from a pinhole camera to a Polaroid, a significant mathematical update to the formula for a popular bioinformatics data visualization method will allow researchers to develop snapshots of single-cell gene expression not only several times faster but also at much higher-resolution. This innovation by mathematicians will reduce the rendering time of a million-point single-cell RNA-sequencing (scRNA-seq) data set from over three hours down to just fifteen minutes. […]

    • Better red than dread: Barrier keeps batteries...
      on February 14, 2019 at 8:31 pm

      A layer of red phosphorus in rechargeable lithium metal batteries can signal when damaging dendrites threaten to create a short circuit. The strategy, which does not require a third electrode, could help bring more powerful lithium metal batteries to market. […]

    • Spintronics by 'straintronics'
      on February 14, 2019 at 8:31 pm

      Data storage in magnetic media is very energy consuming. Novel materials could reduce the energy needed to control magnetic memories thus contributing to a smaller carbon footprint of the IT sector. Now an international team has observed at the HZB lightsource BESSY II a new phenomenon in iron nanograins: whereas normally the magnetic moments of the iron grains are disordered at room temperature, this can be changed by applying an electric field. […]

    • Shaping light lets 2D microscopes capture 4D data
      on February 14, 2019 at 8:31 pm

      Researchers have created a method to design custom masks that transform 2D fluorescent microscopy images into 3D movies. […]

    • Ultra-lightweight ceramic material withstands...
      on February 14, 2019 at 8:30 pm

      Researchers have created an extremely light, very durable ceramic aerogel. The material could be used for applications like insulating spacecraft because it can withstand the intense heat and severe temperature changes that space missions endure. […]

    • Direct-write quantum calligraphy in monolayer...
      on February 14, 2019 at 4:55 pm

      An interdisciplinary team of researchers have developed a way to directly write quantum light sources, which emit a single photon of light at a time, into monolayer semiconductors. […]

    • Blockchain can strengthen the credibility of...
      on February 14, 2019 at 3:24 pm

      Blockchain -- the technology behind the secure transactions of cryptocurrencies like Bitcoin -- can make it easier for researchers to conduct transparent meta-analyses in social science research where reproducibility is a growing concern. […]