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Surfing for science

29.07.2015 by Kaido Reivelt

Thanks to a new system developed by scientists in the UK, taking to the waves for a spot of surfing can benefit research into the health of coastal waters, and could help confirm satellite measurements of sea-surface temperature.

Filed Under: RSS Kosmos

Space Kombucha in the search for life and its origin

29.07.2015 by Kaido Reivelt

You might know it as a drink for hipsters or as an ancient brew drunk for centuries in Eurasia, but the culture that ferments sugary tea into Kombucha is going around the world. Bolted to the outside of the International Space Station are …

Filed Under: RSS Kosmos

Astronomers discover powerful aurora beyond solar system

29.07.2015 by Kaido Reivelt

The scientists found the aurora not from a planet, but from a low-mass star at the boundary between stars and brown dwarfs.

Filed Under: RSS Kosmos

First detection of lithium from an exploding star

29.07.2015 by Kaido Reivelt

Observations of Nova Centauri 2013 help to explain the mystery of why many young stars seem to have more of this chemical element than expected.

Filed Under: RSS Kosmos

NASA Mars Orbiter Preparing for Mars Lander’s 2016 Arrival

28.07.2015 by Kaido Reivelt

NASA’s Mars Reconnaissance Orbiter will fire thrusters on Wednesday for a maneuver to get into position for the 2016 arrival of NASA’s next Mars lander.

Filed Under: RSS Kosmos

New Names and Insights at Ceres

28.07.2015 by Kaido Reivelt

Colorful new maps of Ceres, based on NASA’s Dawn spacecraft data, showcase a diverse topography, with dramatic height differences between crater bottoms and mountain peaks.

Filed Under: RSS Kosmos

Control of Optical Transitions with Magnetic Fields in Weakly Bound Molecules

28.07.2015 by

Author(s): B. H. McGuyer, M. McDonald, G. Z. Iwata, W. Skomorowski, R. Moszynski, and T. Zelevinsky

Magnetic fields can be used to make a normally forbidden molecular transition accessible to optical excitation, using much lower fields than would be needed to achieve the same with the constituent atoms.


[Phys. Rev. Lett. 115, 053001] Published Tue Jul 28, 2015

Filed Under: RSS Teadus

Resolving the Tevatron Top Quark Forward-Backward Asymmetry Puzzle: Fully Differential Next-to-Next-to-Leading-Order Calculation

28.07.2015 by Kaido Reivelt

Author(s): Michal Czakon, Paul Fiedler, and Alexander Mitov

Fully differential two loop calculations in the Standard Model explain the excess of top quarks in the direction of the proton beam in pp¯ collisions at the Tevatron collider.


[Phys. Rev. Lett. 115, 052001] Published Tue Jul 28, 2015

Filed Under: RSS Teadus

Orbital handover

28.07.2015 by Kaido Reivelt


Human spaceflight and operations image of the week: MSG-4 controllers hand over Europe’s newest weather satellite

Filed Under: RSS Kosmos

Dense galaxies hiding in plain sight

28.07.2015 by Kaido Reivelt

Undergraduates discovered two tiny galaxies crammed with stars at more than 10,000 times the density of the Milky Way.

Filed Under: RSS Kosmos

Ceres gets new maps, new names

28.07.2015 by Kaido Reivelt

Now with detailed topography and official feature names from the IAU, these maps of asteroid Ceres are worth exploring.

Filed Under: RSS Kosmos

First applications from Sentinel-2A

27.07.2015 by Kaido Reivelt

From agricultural monitoring to charting changing lands, early images from Europe’s new Sentinel-2A satellite show how the ‘colour vision’ mission’s critical observations can be used to keep us and our planet safe.

Filed Under: RSS Kosmos

Introducing Sentinel-2

27.07.2015 by Kaido Reivelt


Discover some of the mission’s benefits for the planet’s ever-growing population, such as deforestation monitoring, food security and the sustainable management of natural resources

Filed Under: RSS Kosmos

Born-again nebula

27.07.2015 by Kaido Reivelt

Space Science image of the week: XMM-Newton’s view of an eye-shaped cloud carved by a dying star’s brief comeback to life

Filed Under: RSS Kosmos

Negative Differential Conductivity in an Interacting Quantum Gas

27.07.2015 by Kaido Reivelt

Author(s): Ralf Labouvie, Bodhaditya Santra, Simon Heun, Sandro Wimberger, and Herwig OttRubidium atoms in an optical trap have been made to exhibit negative differential conductance, a phenomenon normally found in semiconductor diodes.[Phys. Rev. Lett…

Filed Under: RSS Teadus

Next two Galileo satellites reach Europe’s Spaceport

27.07.2015 by Kaido Reivelt

Europe’s ninth and tenth Galileo satellites have crossed the Atlantic, touching down in French Guiana ahead of their joint launch this September.

Filed Under: RSS Kosmos

Fossil star clusters reveal their age

27.07.2015 by Kaido Reivelt

A new survey of globular clusters show many of the star groups are almost as old as the universe itself.

Filed Under: RSS Kosmos

New Hubble image shows cosmic wind creating “Pillars of Destruction”

27.07.2015 by Kaido Reivelt

A new study shows how cosmic winds can erode a galaxy’s gas and dust, shutting down star formation.

Filed Under: RSS Kosmos

ESA hands over control of the MSG-4 weather satellite

27.07.2015 by Kaido Reivelt

On 26 July at 09:30 GMT (11:30 CEST), ESA handed control of Europe’s last Meteosat Second Generation weather satellite, MSG-4, to EUMETSAT

Filed Under: RSS Kosmos

New Horizons team finds haze, flowing ice on Pluto

25.07.2015 by Kaido Reivelt

Just 10 days after closest approach, the distant world is showing a diversity of planetary geology that has mission scientists thrilled.

Filed Under: RSS Kosmos

Week In Images

24.07.2015 by Kaido Reivelt

Our week through the lens: 20-24 July 2015

Filed Under: RSS Kosmos

Drag Moderation by the Melting of an Ice Surface in Contact with Water

24.07.2015 by

Author(s): Ivan U. Vakarelski, Derek Y. C. Chan, and Sigurdur T. Thoroddsen

An ice coating can halve the drag of an object moving in water by reducing the turbulent wake behind it.


[Phys. Rev. Lett. 115, 044501] Published Fri Jul 24, 2015

Filed Under: RSS Teadus

Atom-Light Hybrid Interferometer

24.07.2015 by

Author(s): Bing Chen, Cheng Qiu, Shuying Chen, Jinxian Guo, L. Q. Chen, Z. Y. Ou, and Weiping Zhang

A new type of interferometer, sensitive to the phases of an atomic spin wave and a light wave is experimentally demonstrated.


[Phys. Rev. Lett. 115, 043602] Published Fri Jul 24, 2015

Filed Under: RSS Teadus

Explore the Space Station

24.07.2015 by Kaido Reivelt


Explore the International Space Station with ESA astronaut Samantha Cristoforetti as your guide in this 360° interactive view

Filed Under: RSS Kosmos

Andreas Mogensen launch moved by a day

24.07.2015 by Kaido Reivelt

The next ESA astronaut to work on the International Space Station, Andreas Mogensen, will arrive a day later than previously planned because the Station’s orbit has been changed.

The Danish flight engineer, commander Sergei Volkov and Kazakh cosmonaut Aidyn Aimbetov will leave Earth from Baikonur, Kazakhstan, at 4:34 GMT (6:34 CEST, 10:34 local time) on 2 September and arrive at the Space Station just six hours later.

Andreas and Aidyn’s stay will be short – they will be back on terra firma just 10 days later. They will leave Sergei on the Station and return to Earth in a different Soyuz under commander Gennady Padalka, who is already in space.

Filed Under: RSS Kosmos

Brown dwarfs, stars share formation process, new study indicates

24.07.2015 by Kaido Reivelt

This is the first time that jets have been found coming from brown dwarfs at such an early stage of their formation and shows that they form in a way similar to that of stars.

Filed Under: RSS Kosmos

NASA’s Curiosity Rover Inspects Unusual Bedrock

23.07.2015 by Kaido Reivelt

The laser-firing instrument on NASA’s Curiosity Mars rover has identified a rock target that is rich in silica, prompting further investigation with the rover.

Filed Under: RSS Kosmos

Less Algae, Not Clearer Water, Keeps Tahoe Blue

23.07.2015 by Kaido Reivelt

Lake Tahoe’s iconic blueness is more strongly related to the lake’s algal concentration than to its clarity.

Filed Under: RSS Kosmos

Finding Another Earth

23.07.2015 by Kaido Reivelt

Kepler’s newest planetary find joins a pantheon of planets with similarities to Earth.

Filed Under: RSS Kosmos

NASA’s Kepler Mission Discovers Bigger, Older Cousin to Earth

23.07.2015 by Kaido Reivelt

NASA’s Kepler mission has confirmed the first near-Earth-size planet in the “habitable zone” around a sun-like star.

Filed Under: RSS Kosmos

Coherent Addressing of Individual Neutral Atoms in a 3D Optical Lattice

23.07.2015 by

Author(s): Yang Wang, Xianli Zhang, Theodore A. Corcovilos, Aishwarya Kumar, and David S. WeissResearchers manipulate atomic qubits individually in a three-dimensional optical lattice.[Phys. Rev. Lett. 115, 043003] Published Thu Jul 23, 2015

Filed Under: RSS Teadus

Earth from Space

23.07.2015 by Kaido Reivelt


Join us Friday, 24 July, at 10:00 CEST for the ‘Earth from Space’ video programme. This week features a Sentinel-1 radar image over southern Bavaria

Filed Under: RSS Kosmos

Kepler mission discovered bigger, older cousin to Earth

23.07.2015 by Kaido Reivelt

The newly discovered Kepler-452b is the smallest planet to date discovered orbiting in the habitable zone or a G2-type star like our Sun.

Filed Under: RSS Kosmos

Pulsar punches hole in stellar disk

23.07.2015 by Kaido Reivelt

Scientists have discovered a binary system where a rapidly spinning neutron star’s wind is rocketing away material from the disk around its companion.

Filed Under: RSS Kosmos

New Website Gathering Public Input on NASA Mars Images

22.07.2015 by Kaido Reivelt

Mars researchers are soliciting volunteers to locate odd polar-area features on Mars that have names such as “Swiss cheese terrain” and “spiders.”

Filed Under: RSS Kosmos

A Wi-Fi Reflector Chip To Speed Up Wearables

22.07.2015 by Kaido Reivelt

Researchers at JPL and UCLA have developed a technology that could reduce the power needed to send information from wearable devices.

Filed Under: RSS Kosmos

Could ‘Windbots’ Someday Explore the Skies of Jupiter?

22.07.2015 by Kaido Reivelt

Wind-harvesting robotic probes might someday explore the atmospheres of other planets, as well as our home planet, thanks to an innovative NASA JPL study.

Filed Under: RSS Kosmos

Temperature-Dependent Three-Dimensional Anisotropy of the Magnetoresistance in WTe_{2}

22.07.2015 by

Author(s): L. R. Thoutam, Y. L. Wang, Z. L. Xiao, S. Das, A. Luican-Mayer, R. Divan, G. W. Crabtree, and W. K. Kwok

Tungsten-ditelluride cleaves easily into atomically thin layers, but its electrons conduct almost isotropically, suggesting a rare case of good charge conduction across weak mechanical bonds.


[Phys. Rev. Lett. 115, 046602] Published Wed Jul 22, 2015

Filed Under: RSS Teadus

Heat on Mercury antenna

22.07.2015 by Kaido Reivelt

Technology image of the week: Testing the antenna that will keep ESA’s Mercury mission linked to Earth

Filed Under: RSS Kosmos

New Horizons finds second mountain range in Pluto’s “heart”

22.07.2015 by Kaido Reivelt

The heights of these mountains are comparable to those found in the U.S. Appalachian range.

Filed Under: RSS Kosmos

ALMA witnesses assembly of galaxies in the early universe for the first time

22.07.2015 by Kaido Reivelt

The new observations allow astronomers to start to see how the first galaxies were built up and how they cleared the cosmic fog during the era of reionization.

Filed Under: RSS Kosmos

New Horizons captures two of Pluto’s smaller moons

22.07.2015 by Kaido Reivelt

As more data on Nix and Hydra come back from the spacecraft, scientists will be able to make more detailed findings on these moons’ surface characteristics and other properties.

Filed Under: RSS Kosmos

Greenland’s Undercut Glaciers Melting Faster than Thought

21.07.2015 by Kaido Reivelt

Greenland’s glaciers are badly undercut and melting faster than thought, raising sea levels faster than currently estimated.

Filed Under: RSS Kosmos

Dark science

21.07.2015 by Kaido Reivelt

Human spaceflight and operations image of the week: Container for storing snow samples at the remotest base in the world

Filed Under: RSS Kosmos

Discontinuous Buckling of Wide Beams and Metabeams

21.07.2015 by

Author(s): Corentin Coulais, Johannes T. B. Overvelde, Luuk A. Lubbers, Katia Bertoldi, and Martin van Hecke

The buckling of mechanical beams under a compressive force can be tuned by adding holes into the beam.


[Phys. Rev. Lett. 115, 044301] Published Tue Jul 21, 2015

Filed Under: RSS Teadus

Dead galaxies in Coma Cluster may be packed with dark matter

21.07.2015 by Kaido Reivelt

New computer simulations show that these galaxies stopped star formation as early as 7 billion years ago but haven’t been ripped apart due to their dark matter.

Filed Under: RSS Kosmos

NASA Hosts Media Telecon About Latest Kepler Discoveries

20.07.2015 by Kaido Reivelt

NASA will host a news teleconference at 9 a.m. PDT (noon EDT) Thursday, July 23, to announce new discoveries made by its planet-hunting mission, the Kepler Space Telescope.

Filed Under: RSS Kosmos

Thermal Conductivity through the Quantum Critical Point in YbRh_{2} Si_{2} at Very Low Temperature

20.07.2015 by

Author(s): M. Taupin, G. Knebel, T. D. Matsuda, G. Lapertot, Y. Machida, K. Izawa, J.-P. Brison, and J. Flouquet

Experiments with heavy-fermion materials show that quasiparticles exist at the critical point of a quantum phase transition.


[Phys. Rev. Lett. 115, 046402] Published Mon Jul 20, 2015

Filed Under: RSS Teadus

Experimental Satellite Quantum Communications

20.07.2015 by

Author(s): Giuseppe Vallone, Davide Bacco, Daniele Dequal, Simone Gaiarin, Vincenza Luceri, Giuseppe Bianco, and Paolo VilloresiFragile photon states useful for quantum communication can be faithfully transmitted and distinguished over a link between a…

Filed Under: RSS Teadus

Cool summer boosts Arctic ice

20.07.2015 by Kaido Reivelt

Measurements from ESA’s CryoSat satellite show that the volume of Arctic sea ice increased by a third following the unusually cool summer of 2013. This new finding suggests that ice in the northern hemisphere is more sensitive to changes in summer melting than it is to winter cooling.

Filed Under: RSS Kosmos

Inside Imhotep

20.07.2015 by Kaido Reivelt


Tour one of the most geologically diverse regions on Rosetta’s comet

Filed Under: RSS Kosmos

Satellite camera provides “EPIC” view of Earth

20.07.2015 by Kaido Reivelt

Data from the new NASA camera will be used to study the sunlit face of our planet.

Filed Under: RSS Kosmos

Internet investor Yuri Milner joins with Berkeley in $100 million search for extraterrestrial intelligence

20.07.2015 by Kaido Reivelt

The Breakthrough Prize Foundation has already contracted with two of the world’s largest radio telescopes to devote major telescope time to searching for signals from other civilizations.

Filed Under: RSS Kosmos

The Argo’s hidden cargo

20.07.2015 by Kaido Reivelt

Space science image of the week: Intricate dust lanes are revealed in this far-infrared view of the constellation Carina

Filed Under: RSS Kosmos

Dawn Maneuvering to Third Science Orbit

17.07.2015 by Kaido Reivelt

NASA’s Dawn spacecraft is using its ion propulsion system to descend to its third mapping orbit at Ceres, and all systems are operating well.

Filed Under: RSS Kosmos

Preparing to build ESA’s Jupiter mission

17.07.2015 by Kaido Reivelt

Airbus Defence & Space in France has been selected as the prime industrial contractor for ESA’s Juice mission to Jupiter and its icy moons.

Filed Under: RSS Kosmos

Week In Images

17.07.2015 by Kaido Reivelt

Our week through the lens: 13-17 July 2015

Filed Under: RSS Kosmos

Thin Films in Partial Wetting: Internal Selection of Contact-Line Dynamics

17.07.2015 by

Author(s): Amir Alizadeh Pahlavan, Luis Cueto-Felgueroso, Gareth H. McKinley, and Ruben JuanesA classic problem of a spreading puddle might be solved by incorporating intermolecular forces between the liquid and the solid underneath.[Phys. Rev. Lett. 1…

Filed Under: RSS Teadus

Pluto’s icy plains, pits, and mountains take shape in Tombaugh Regio

17.07.2015 by Kaido Reivelt

New views of Tombaugh Regio, Pluto’s icy heart, provide still more evidence of a geologically rich world.

Filed Under: RSS Kosmos

Gaia satellite and amateur astronomers spot one in a billion star

17.07.2015 by Kaido Reivelt

It is a type of a two-star system known as a cataclysmic variable, where one super dense white dwarf star is stealing gas from its companion star, effectively “cannibalizing” it.

Filed Under: RSS Kosmos

A simple demonstration of Einstein’s lift: a body thrown upwards moves rectilinearly and uniformly relative to a free-falling model of the lift

17.07.2015 by Kaido Reivelt

The educational model of Einstein’s lift consists of a table suspended from an electromagnet. A
flexible support is attached to the table. A metal ball is on the support and deforms it. When the
electromagnet is deenergized, the table falls, the syst…

Filed Under: RSS Füüsikaharidus

Measurement reduction method for the Millikan oil-drop experiment

17.07.2015 by

To overcome the shortcomings of the measurement procedure used for the Millikan oil-drop experiment
course, this paper suggests a measurement reduction method based on simplification of the
conventional formula. In this method, only the voltage and t…

Filed Under: RSS Füüsikaharidus

Calculation of the ac to dc resistance ratio of conductive nonmagnetic straight conductors by applying FEM simulations

17.07.2015 by Kaido Reivelt

This paper analyzes the skin and proximity effects in different conductive nonmagnetic straight
conductor configurations subjected to applied alternating currents and voltages. These effects have
important consequences, including a rise of the ac res…

Filed Under: RSS Füüsikaharidus

A relativistic spin zero particle in a spherical cavity

17.07.2015 by

The problem of a relativistic massive scalar particle trapped in an infinite potential spherical
well is pedagogically addressed in this paper. The wave function solutions and probability density
of the Klein–Gordon equation in spherical coordinate…

Filed Under: RSS Füüsikaharidus

Evidence of Wγγ Production in pp Collisions at sqrt[s] =8 TeV and Limits on Anomalous Quartic Gauge Couplings with the ATLAS Detector

16.07.2015 by Kaido Reivelt

Author(s): G. Aad et al. (ATLAS Collaboration)The first measurement of triple gauge boson production (W boson and two photons) at the LHC provides new limits on interactions beyond the standard model.[Phys. Rev. Lett. 115, 031802] Published Thu Jul 16,…

Filed Under: RSS Teadus

Coupling Ferroelectricity with Spin-Valley Physics in Oxide-Based Heterostructures

16.07.2015 by Kaido Reivelt

Author(s): Kunihiko Yamauchi, Paolo Barone, Tatsuya Shishidou, Tamio Oguchi, and Silvia PicozziA theoretically proposed oxide-based heterostructure indicates how coupling of spin and valley degrees of freedom may be engineered and controlled via the fe…

Filed Under: RSS Teadus

Earth from Space

16.07.2015 by Kaido Reivelt


Join us Friday, 17 July, at 10:00 CEST for the ‘Earth from Space’ video programme. This week features a satellite image of New York City

Filed Under: RSS Kosmos

A dark matter bridge in our cosmic neighborhood

16.07.2015 by Kaido Reivelt

This is the first time scientists have had observational verification that large filamentary superhighways are channeling dwarf galaxies across the cosmos along bridges of dark matter.

Filed Under: RSS Kosmos

The mysterious “lakes” on Saturn’s moon Titan

16.07.2015 by Kaido Reivelt

A new study of Titan’s surface depressions suggests that it dissolves in a process similar to the creation of sinkholes on Earth.

Filed Under: RSS Kosmos

Full launch coverage

16.07.2015 by Kaido Reivelt


Watch the replay of the full MSG-4 launch coverage from Europe’s Spaceport in French Guiana on 15 July

Filed Under: RSS Kosmos

Launch replay

16.07.2015 by Kaido Reivelt


Missed MSG-4 liftoff? Watch the replay of the launch from Europe’s Spaceport in French Guiana on 15 July

Filed Under: RSS Kosmos

X-ray specs

15.07.2015 by Kaido Reivelt

Technology image of the week: ESA’s 7.5 tonne X-ray machine for seeing into space parts

Filed Under: RSS Kosmos

THz-Pulse-Induced Selective Catalytic CO Oxidation on Ru

15.07.2015 by Kaido Reivelt

Author(s): Jerry L. LaRue, Tetsuo Katayama, Aaron Lindenberg, Alan S. Fisher, Henrik Öström, Anders Nilsson, and Hirohito Ogasawara

Terahertz pulses drive certain reactions on a metal surface by selectively exciting some of the adsorbed molecules.


[Phys. Rev. Lett. 115, 036103] Published Wed Jul 15, 2015

Filed Under: RSS Teadus

Physical Limit to Concentration Sensing Amid Spurious Ligands

15.07.2015 by Kaido Reivelt

Author(s): Thierry MoraThe accuracy with which a cell can sense a specific ligand is limited by the concentration of incorrect ligands that can bind to and interfere with the cell receptors.[Phys. Rev. Lett. 115, 038102] Published Wed Jul 15, 2015

Filed Under: RSS Teadus

Boundary conditions

15.07.2015 by Kaido Reivelt


Stunning shots of Rosetta’s comet reveal details of regional boundaries

Filed Under: RSS Kosmos

MSG-4 liftoff

15.07.2015 by Kaido Reivelt


MSG-4 lifted off on an Ariane 5 launcher from Europe’s Spaceport in French Guiana at 21:24 GMT (23:42 CEST) on 15 July

Filed Under: RSS Kosmos

MSG-4 in orbit

15.07.2015 by Kaido Reivelt


The last weather satellite in Europe’s highly successful Meteosat Second Generation series has been launched from Europe’s Spaceport in Kourou, French Guiana

Filed Under: RSS Kosmos

Europe’s MSG-4 weather satellite delivered into orbit

15.07.2015 by Kaido Reivelt

The last weather satellite in Europe’s highly successful Meteosat Second Generation series lifted off on an Ariane 5 launcher at 21:42 GMT (23:42 CEST) on 15 July from Europe’s Spaceport in Kourou, French Guiana.

Filed Under: RSS Kosmos

Discovery of a new class of particles at the LHC

15.07.2015 by Kaido Reivelt

The pentaquark represents a way to aggregate the fundamental constituents of ordinary protons and neutrons in a pattern that has never been observed before.

Filed Under: RSS Kosmos

Pluto’s bright heart and Charon’s dark spot revealed in HD

15.07.2015 by Kaido Reivelt

New Horizons’ first high-resolution images of Pluto are giving astronomers insight into the dwarf world’s complex ice geology.

Filed Under: RSS Kosmos

Jupiter twin discovered around solar twin

15.07.2015 by Kaido Reivelt

The existence of a Jupiter-mass planet in a Jupiter-like orbit around a Sun-like star opens the possibility that the system of exoplanets around this star may be similar to our solar system.

Filed Under: RSS Kosmos

Measuring the hydrogen Balmer series and Rydberg?s constant with a homemade spectrophotometer

15.07.2015 by Kaido Reivelt

In a recent paper (Amrani 2014 Eur. J. Phys. 35 [http://dx.doi.org/10.1088/0143-0807/35/4/045001]
045001 ), the author presented two different methods to measure the wavelength of visible lines of
Balmer series from the hydrogen atomic spectrum and e…

Filed Under: RSS Füüsikaharidus

Elucidating the electron transport in semiconductors via Monte Carlo simulations: an inquiry-driven learning path for engineering undergraduates

15.07.2015 by

Within the context of higher education for science or engineering undergraduates, we present an
inquiry-driven learning path aimed at developing a more meaningful conceptual understanding of the
electron dynamics in semiconductors in the presence of …

Filed Under: RSS Füüsikaharidus

Visualizing the phenomena of wave interference, phase-shifting and polarization by interactive computer simulations

15.07.2015 by Kaido Reivelt

In this manuscript a computer based simulation is proposed for teaching concepts of interference of
light (under the scheme of a Michelson interferometer), phase-shifting and polarization states. The
user can change some parameters of the interfering…

Filed Under: RSS Füüsikaharidus

An RGB approach to extraordinary spectra

15.07.2015 by Kaido Reivelt

After Newton had explained a series of ordinary spectra and Goethe had pointed out its complementary
counterpart, Nussbaumer discovered a series of extraordinary spectra which are geometrically
identical and colourwise analogous to Newton’s and Goe…

Filed Under: RSS Füüsikaharidus

The Klein paradox: a new treatment

15.07.2015 by Kaido Reivelt

The Dirac equation requires a treatment of the step potential that differs fundamentally from the
traditional treatment, because the Dirac plane waves, besides momentum and spin, are characterized
by a quantum number with the physical meaning of sign…

Filed Under: RSS Füüsikaharidus

Measuring the hydrogen Balmer series and Rydberg’s constant with a homemade spectrophotometer

15.07.2015 by Kaido Reivelt

In a recent paper (Amrani 2014 Eur. J. Phys. 35 [http://dx.doi.org/10.1088/0143-0807/35/4/045001]
045001 ), the author presented two different methods to measure the wavelength of visible lines of
Balmer series from the hydrogen atomic spectrum and e…

Filed Under: RSS Füüsikaharidus

Construction of an inexpensive molecular iodine spectrometer using a self-developed Pohl wavemeter around 670 nm wavelength

15.07.2015 by Kaido Reivelt

We describe the construction of an inexpensive iodine spectrometer with a homemade iodine vapour
cell and a self-developed wavemeter based on the Pohl interferometer, around the 670 nm wavelength.
This can be easily realized in an undergraduate teach…

Filed Under: RSS Füüsikaharidus

Pluto and Charon show craters, dark spots, and even signs of snow as New Horizons flies by

15.07.2015 by Kaido Reivelt

Mission scientists are thrilled with the data already, and they haven’t even received information from the flyby yet.

Filed Under: RSS Kosmos

Watch MSG-4 launch

14.07.2015 by Kaido Reivelt


Follow the launch of Europe’s next weather satellite live on Wednesday night. MSG-4 is set for liftoff on an Ariane launcher in a 37-minute window starting at 21:42 GMT (23:42 CEST) on 15 July

Filed Under: RSS Kosmos

Density-Functional Theory for Strongly Correlated Bosonic and Fermionic Ultracold Dipolar and Ionic Gases

14.07.2015 by Kaido Reivelt

Author(s): F. Malet, A. Mirtschink, C. B. Mendl, J. Bjerlin, E. Ö. Karabulut, S. M. Reimann, and Paola Gori-Giorgi

An alternative functional for DFT calculations enables simulations of ultracold gases with long-ranged interactions.


[Phys. Rev. Lett. 115, 033006] Published Tue Jul 14, 2015

Filed Under: RSS Teadus

Dzyaloshinskii-Moriya Interaction and Hall Effects in the Skyrmion Phase of Mn_{1−x} Fe_{x} Ge

14.07.2015 by Kaido Reivelt

Author(s): J. Gayles, F. Freimuth, T. Schena, G. Lani, P. Mavropoulos, R. A. Duine, S. Blügel, J. Sinova, and Y. Mokrousov

A new theoretical treatment of Skyrmions in ferromagnets shows that electron dynamics are governed by Berry phase physics.


[Phys. Rev. Lett. 115, 036602] Published Tue Jul 14, 2015

Filed Under: RSS Teadus

iriss ground control

14.07.2015 by Kaido Reivelt

Human spaceflight and operations image of the week: ESA astronaut Andreas Mogensen visiting the Columbus Control Centre for the last time before his iriss mission

Filed Under: RSS Kosmos

Astronomy summer school radar observations shine new light on near-Earth asteroid

14.07.2015 by Kaido Reivelt

The images reveal an elongated object that is only 260 feet (80 meters) across at its widest point.

Filed Under: RSS Kosmos

NASA’s three-billion-mile journey to Pluto reaches historic encounter

14.07.2015 by Kaido Reivelt

New Horizons made closest approach to the distant world at 7:50 a.m. EDT this morning.

Filed Under: RSS Kosmos

Live coverage: New Horizons’ historic Pluto flyby

14.07.2015 by Kaido Reivelt

Twenty-five years in the making, this close-up examination of the Pluto system represents the capstone of the first era of planet reconnaissance.

Filed Under: RSS Kosmos

Europe advances with safer air travel

14.07.2015 by Kaido Reivelt

A safer airspace over Europe by 2018 is materialising as ESA’s Iris precursor project today began development with the unlocking of a further €7.6 million of funding.

Filed Under: RSS Kosmos

MSG-4 launch timeline

14.07.2015 by Kaido Reivelt

On 15 July, a powerful Ariane launcher will loft Europe’s final Meteosat Second Generation weather satellite into orbit from Kourou, French Guiana. For the mission control team at ESA, liftoff will mark the end of months of careful preparations and the start of the mission’s first critical phase.

Filed Under: RSS Kosmos

How big is Pluto? New Horizons settles decades-long debate

14.07.2015 by Kaido Reivelt

Based on the most recent data, Pluto is actually larger than previous conservative estimates, making it the largest of all known solar system objects beyond Neptune.

Filed Under: RSS Kosmos

Experimental Test of Entropic Noise-Disturbance Uncertainty Relations for Spin-1/2 Measurements

13.07.2015 by Kaido Reivelt

Author(s): Georg Sulyok, Stephan Sponar, Bülent Demirel, Francesco Buscemi, Michael J. W. Hall, Masanao Ozawa, and Yuji Hasegawa

Experiments on neutrons confirm an information-theoretic formulation of Heisenberg’s noise-disturbance uncertainty principle: There is a reciprocal trade-off in knowledge of two incompatible spin observables.


[Phys. Rev. Lett. 115, 030401] Published Mon Jul 13, 2015

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