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NASA Working with Partners to Provide Harvey Response

30.08.2017 by Kaido Reivelt

NASA is using its assets and expertise from across the agency, including from JPL, to help respond to Hurricane/Tropical Storm Harvey.

Filed Under: RSS Kosmos

NASA and Iconic Museum Honor Voyager Spacecraft 40th Anniversary

30.08.2017 by Kaido Reivelt

NASA and the Smithsonian National Air and Space Museum will celebrate 40 years of the Voyager 1 and 2 spacecraft.

Filed Under: RSS Kosmos

Juno Scientists Prepare for Seventh Science Pass of Jupiter

30.08.2017 by Kaido Reivelt

NASA’s Juno spacecraft will make its seventh science flyby over Jupiter’s mysterious cloud tops this Friday.

Filed Under: RSS Kosmos

NASA and Iconic Museum Honor Voyager Spacecraft 40th Anniversary

30.08.2017 by Kaido Reivelt

NASA and the Smithsonian National Air and Space Museum will celebrate 40 years of the Voyager 1 and 2 spacecraft.

Filed Under: RSS Kosmos

Juno Scientists Prepare for Seventh Science Pass of Jupiter

30.08.2017 by Kaido Reivelt

NASA’s Juno spacecraft will make its seventh science flyby over Jupiter’s mysterious cloud tops this Friday.

Filed Under: RSS Kosmos

Space-inspired Star Storm to premiere next month

30.08.2017 by Kaido Reivelt

Star Storm, an explosive performance inspired by stellar processes in the Universe, will be premiered at the 2017 Ars Electronica Festival in Linz, Austria, on 10 September.

Filed Under: RSS Kosmos

A slice of Hubble

30.08.2017 by Kaido Reivelt


Technology image of the week: Hardware that has been to space and back will be on show during ESA’s 8 October Open Day in the Netherlands

Filed Under: RSS Kosmos

Astronomers recover a lost nova

30.08.2017 by Kaido Reivelt

First observed 600 years ago, this binary system is providing vital clues to how novae work.

Filed Under: RSS Kosmos

Saturn Plunge Nears for Cassini Spacecraft

29.08.2017 by Kaido Reivelt

NASA’s Cassini spacecraft is 18 days from its mission-ending dive into the atmosphere of Saturn.

Filed Under: RSS Kosmos

Saturn Plunge Nears for Cassini Spacecraft

29.08.2017 by Kaido Reivelt

NASA’s Cassini spacecraft is 18 days from its mission-ending dive into the atmosphere of Saturn.

Filed Under: RSS Kosmos

Heavy but fast

29.08.2017 by Kaido Reivelt

Human spaceflight and robotic exploration image of the week: A particle accelerator recreates cosmic radiation

Filed Under: RSS Kosmos

HiOptic Photography’s Great American Eclipse

29.08.2017 by Kaido Reivelt

This video of the eclipse from Gallatin, Tennessee, offers a great look back at totality.

Filed Under: RSS Kosmos

How I salvaged materials to build a great eclipse scope

29.08.2017 by Kaido Reivelt

A little trash picking, a little scrap scrounging, and some father-son elbow grease turned a hunk of junk telescope into an eclipse machine.

Filed Under: RSS Kosmos

Cloud-free view

29.08.2017 by Kaido Reivelt

Automatically stitching together multiple images from Sentinel-2, Austrian company EOX gives us an unobstructed view of Earth

Filed Under: RSS Kosmos

NASA’s Next Mars Mission to Investigate Interior of Red Planet

28.08.2017 by Kaido Reivelt

Preparation of NASA’s next spacecraft to Mars, InSight, has ramped up this summer, on course for launch next May as the first interplanetary launch from California.

Filed Under: RSS Kosmos

NASA’s Next Mars Mission to Investigate Interior of Red Planet

28.08.2017 by Kaido Reivelt

Preparation of NASA’s next spacecraft to Mars, InSight, has ramped up this summer, on course for launch next May as the first interplanetary launch from California.

Filed Under: RSS Kosmos

Endel Lippmaa mälestusloeng

28.08.2017 by Kaido Reivelt

Teisipäeval, 12. septembril 2017 algusega kell 14 toimub teaduste akadeemia saalis (Kohtu 6, Toompea) esimene Endel Lippmaa mälestusloeng, mille peab nobelist Kurt Wüthrich (sünd 1938; Nobeli keemiaauhind 2002). Loengu teema: “Basic Research in NMR and its Impact on Daily Human Life”. Pärast loengut antakse professor Kurt Wüthrichile üle akadeemik Endel Lippmaa nimeline medal. Endel Lippmaa mälestusloengute ja […]

Filed Under: Eestist endast

Scientists find that the stars in the Pleiades are variable

28.08.2017 by Kaido Reivelt

A new algorithm can change the way Kepler measures brightness.

Filed Under: RSS Kosmos

Managing water

28.08.2017 by Kaido Reivelt

As international experts convene in Stockholm for World Water Week, discover how satellites help to manage this precious resource for irrigation

Filed Under: RSS Kosmos

Cassini closes in

28.08.2017 by Kaido Reivelt


Space Science Image of the Week: Cassini is making its final dives between Saturn and its rings before the mission’s grand finale next month

Filed Under: RSS Kosmos

Gravitatsiooniteoreetikud kogunevad Tartusse, et mõelda Einsteinist edasi

27.08.2017 by Kaido Reivelt

28. augustist 1. septembrini toimub TÜ füüsika instituudis rahvusvaheline konverents „Gravitatsiooni geomeetrilised alused“, mis toob kokku üle 60 teoreetilise füüsiku ja matemaatiku enam kui 20 riigist. Einsteini üldrelatiivusteooria, mis kirjeldab gravitatsiooninähtuseid matemaatiliselt aegruumi kõveruse kaudu, on heas kooskõlas paljude astronoomiliste vaatlustega ning sai hiljuti hiilgava kinnituse gravitatsioonilainete avastamise näol. Ometi tõstatavad kosmoloogias seni lahenduseta tumeaine […]

Filed Under: Eestist endast

Mars has some serious snowstorms at night

25.08.2017 by Kaido Reivelt

A new study shows what happens in Mars’ atmosphere when the Sun sets.

Filed Under: RSS Kosmos

NASA Satellite Images Show Evolution of Hurricane Harvey

25.08.2017 by Kaido Reivelt

The rapid intensification of Harvey is depicted in a new set of images from a pair of instruments on NASA’s Aqua satellite.

Filed Under: RSS Kosmos

NASA Satellite Images Show Evolution of Hurricane Harvey

25.08.2017 by Kaido Reivelt

The rapid intensification of Harvey is depicted in a new set of images from a pair of instruments on NASA’s Aqua satellite.

Filed Under: RSS Kosmos

Saturn With a Side of Bacon

25.08.2017 by Kaido Reivelt

Take a peek inside the Cassini team’s beloved tradition of Friday breakfast together.

Filed Under: RSS Kosmos

NASA Satellite Images Show Evolution of Hurricane Harvey

25.08.2017 by Kaido Reivelt

The rapid intensification of Harvey is depicted in a new set of images from a pair of instruments on NASA’s Aqua satellite.

Filed Under: RSS Kosmos

A Clockwork Rover for Venus

25.08.2017 by Kaido Reivelt

Mechanical computers could help explore an extremely unwelcoming planet.

Filed Under: RSS Kosmos

Saturn With a Side of Bacon

25.08.2017 by Kaido Reivelt

Take a peek inside the Cassini team’s beloved tradition of Friday breakfast together.

Filed Under: RSS Kosmos

NASA Satellite Images Show Evolution of Hurricane Harvey

25.08.2017 by Kaido Reivelt

The rapid intensification of Harvey is depicted in a new set of images from a pair of instruments on NASA’s Aqua satellite.

Filed Under: RSS Kosmos

A Clockwork Rover for Venus

25.08.2017 by Kaido Reivelt

Mechanical computers could help explore an extremely unwelcoming planet.

Filed Under: RSS Kosmos

Watching Harvey

25.08.2017 by Kaido Reivelt


Sentinel-3A takes Hurricane Harvey’s temperature as the storm gains strength and moves towards Texas

Filed Under: RSS Kosmos

Magneto-Optical Detection of the Spin Hall Effect in Pt and W Thin Films

25.08.2017 by Kaido Reivelt

Author(s): C. Stamm, C. Murer, M. Berritta, J. Feng, M. Gabureac, P. M. Oppeneer, and P. Gambardella

Spin accumulation due to the spin Hall effect has, for the first time, been detected directly, rather than inferred indirectly, in nonmagnetic conductors.


[Phys. Rev. Lett. 119, 087203] Published Fri Aug 25, 2017

Filed Under: RSS Teadus

Popsicle-Stick Cobra Wave

25.08.2017 by Kaido Reivelt

Author(s): Jean-Philippe Boucher, Christophe Clanet, David Quéré, and Frédéric Chevy

High-speed video of the dramatic “cobra wave” produced by a latticework of popsicle sticks helped researchers explain the shape and speed of the wave.


[Phys. Rev. Lett. 119, 084301] Published Fri Aug 25, 2017

Filed Under: RSS Teadus

Big dishes band together

25.08.2017 by Kaido Reivelt

Earlier this month, radio dishes from three deep-space networks combined to catch faint ‘survival’ whispers from one of ESA’s Mars orbiters, underlining the value of international collaboration for exploring the Red Planet.

Filed Under: RSS Kosmos

Week in Images

25.08.2017 by Kaido Reivelt

Our week through the lens: 21-25 August 2017

Filed Under: RSS Kosmos

Astronomers have just mapped the surface of Antares

25.08.2017 by Kaido Reivelt

This is our best yet image of a star that’s not the Sun.

Filed Under: RSS Kosmos

NASA Announces Cassini End-of-Mission Activities

24.08.2017 by Kaido Reivelt

On Sept. 15, NASA’s Cassini spacecraft will complete its remarkable story of exploration with an intentional plunge into Saturn’s atmosphere, ending its mission after nearly 20 years in space.

Filed Under: RSS Kosmos

NASA Announces Cassini End-of-Mission Activities

24.08.2017 by Kaido Reivelt

On Sept. 15, NASA’s Cassini spacecraft will complete its remarkable story of exploration with an intentional plunge into Saturn’s atmosphere, ending its mission after nearly 20 years in space.

Filed Under: RSS Kosmos

Granting weightless wishes

24.08.2017 by Kaido Reivelt

ESA participated in the Kid’s Weightless Dreams campaign organised by Novespace and Rêves de Gosse giving children with disabilities the opportunity to experience weightlessness and lunar gravity on a parabolic flight. 

Filed Under: RSS Kosmos

ESA and Chinese astronauts train together

24.08.2017 by Kaido Reivelt

ESA astronauts Samantha Cristoforetti and Matthias Maurer joined 16 Chinese astronauts earlier this month for nine days of sea survival training off China’s coastal city of Yantai. The ultimate goal is for ESA to establish a long term cooperation with China and ESA astronaut to fly on China’s space station.

Filed Under: RSS Kosmos

A tale of two eclipses

24.08.2017 by Kaido Reivelt

A past Astronomy contributor compares his eclipse experiences.

Filed Under: RSS Kosmos

Astronomers catch X-rays from a stellar explosion

24.08.2017 by Kaido Reivelt

This first-of-its-kind detection suggests there’s still much to learn about supernovae.

Filed Under: RSS Kosmos

I see you

24.08.2017 by Kaido Reivelt


Operations image of the week: During the first open day at ESA’s centre in Germany in 1974, one young visitor kept his eye on the camera while crowds mobbed the main control room

Filed Under: RSS Kosmos

Study of Jet Quenching with $Z+\text{jet}$ Correlations in Pb-Pb and $pp$ Collisions at ${\sqrt{s}}_{NN}=5.02\text{ }\text{ }\mathrm{TeV}$

23.08.2017 by Kaido Reivelt

Author(s): A. M. Sirunyan et al. (CMS Collaboration)

Properties of the quark-gluon plasma can be inferred from measurements of jets and Z bosons simultaneously produced in the ion collisions that create the plasma.


[Phys. Rev. Lett. 119, 082301] Published Wed Aug 23, 2017

Filed Under: RSS Teadus

Uranus and Neptune: Cloudy with a chance of diamonds

23.08.2017 by Kaido Reivelt

Researchers at SLAC National Accelerator Laboratory have recreated the ice giants’ diamond rain.

Filed Under: RSS Kosmos

Chasing the eclipse from China to Dallas, Oregon

23.08.2017 by Kaido Reivelt

A team of Chinese astronomers studied the Sun during the 117-second totality.

Filed Under: RSS Kosmos

Burn scars

23.08.2017 by Kaido Reivelt

Sentinel-2 shows blazes and dramatic burn scars from wildfires in Greece

Filed Under: RSS Kosmos

Time for the Moon

23.08.2017 by Kaido Reivelt


Technology image of the week: This crew of Polish ‘astronauts’ are testing altered perceptions of time during a two-week simulated stay on the Moon

Filed Under: RSS Kosmos

Sea survival training

22.08.2017 by Kaido Reivelt

ESA astronauts Matthias Maurer and Samantha Cristoforetti participate in Chinese sea survival training

Filed Under: RSS Kosmos

Return of the Sun

22.08.2017 by Kaido Reivelt

Human spaceflight and robotic operations image of the week: Sun returns after four months of darkness in Antarctica

Filed Under: RSS Kosmos

Solar spectacular seen from Earth and space

22.08.2017 by Kaido Reivelt

While ground-based observers experienced the awe-inspiring view of a total solar eclipse yesterday, astronauts aboard the International Space Station, and our Sun-watching satellites, enjoyed unique perspectives of this spectacular sight f…

Filed Under: RSS Kosmos

Solar spectacular

22.08.2017 by Kaido Reivelt


Images from Earth and space as 21 August’s solar eclipse swept over the globe

Filed Under: RSS Kosmos

Direct Observation of Dynamical Quantum Phase Transitions in an Interacting Many-Body System

21.08.2017 by Kaido Reivelt

Author(s): P. Jurcevic, H. Shen, P. Hauke, C. Maier, T. Brydges, C. Hempel, B. P. Lanyon, M. Heyl, R. Blatt, and C. F. Roos

The observation of dynamical quantum phase transitions in an interacting many-body system breaks new ground in the study of matter out of thermal equilibrium.


[Phys. Rev. Lett. 119, 080501] Published Mon Aug 21, 2017

Filed Under: RSS Teadus

Before the eclipse

21.08.2017 by Kaido Reivelt


The Sun as seen by SOHO and Proba-2 as astronomers prepare for today’s total solar eclipse

Filed Under: RSS Kosmos

Before the eclipse

21.08.2017 by Kaido Reivelt


The Sun as seen by SOHO and Proba-2 as astronomers prepare for today’s total solar eclipse

Filed Under: RSS Kosmos

Experimental confirmation of Lenz’s law

21.08.2017 by Kaido Reivelt

The paper presents a series of experiments that demonstrate the phenomenon of electromagnetic
induction. These make it possible to determine the direction of the induced current and so confirm
Lenz’s Law. The simple experiments can be reproduced in…

Filed Under: RSS Füüsikaharidus

Experimental confirmation of Lenz’s law

21.08.2017 by Kaido Reivelt

The paper presents a series of experiments that demonstrate the phenomenon of electromagnetic
induction. These make it possible to determine the direction of the induced current and so confirm
Lenz’s Law. The simple experiments can be reproduced in…

Filed Under: RSS Füüsikaharidus

A semi-analytical approach to black body radiation

21.08.2017 by Kaido Reivelt

We describe a semi-analytical method to calculate the total radiance received from a black body,
between two frequencies. As has been done before, the method takes advantage of the fact that the
solution simplifies with the use of polylogarithm funct…

Filed Under: RSS Füüsikaharidus

Some didactical suggestions for a deeper embedding of DC circuits into electromagnetism

21.08.2017 by Kaido Reivelt

Undergraduate students often encounter great difficulties in understanding Ohm’s law and electrical
circuits. Considering the widespread students’ beliefs and their common mistakes, as they come out
from the literature and our teaching experience…

Filed Under: RSS Füüsikaharidus

A semi-analytical approach to black body radiation

21.08.2017 by Kaido Reivelt

We describe a semi-analytical method to calculate the total radiance received from a black body,
between two frequencies. As has been done before, the method takes advantage of the fact that the
solution simplifies with the use of polylogarithm funct…

Filed Under: RSS Füüsikaharidus

Some didactical suggestions for a deeper embedding of DC circuits into electromagnetism

21.08.2017 by Kaido Reivelt

Undergraduate students often encounter great difficulties in understanding Ohm’s law and electrical
circuits. Considering the widespread students’ beliefs and their common mistakes, as they come out
from the literature and our teaching experience…

Filed Under: RSS Füüsikaharidus

Full-Gap Superconductivity Robust against Disorder in Heavy-Fermion ${\mathrm{CeCu}}_{2}{\mathrm{Si}}_{2}$

18.08.2017 by Kaido Reivelt

Author(s): T. Takenaka, Y. Mizukami, J. A. Wilcox, M. Konczykowski, S. Seiro, C. Geibel, Y. Tokiwa, Y. Kasahara, C. Putzke, Y. Matsuda, A. Carrington, and T. Shibauchi

Magnetic penetration depth measurements show that the superconducting gap in this iconic heavy-fermion superconductor is robust against the introduction of disorder, ruling out some superconductivity mechanisms as explanations.


[Phys. Rev. Lett. 119, 077001] Published Fri Aug 18, 2017

Filed Under: RSS Teadus

Week in Images

18.08.2017 by Kaido Reivelt

Our week through the lens: 14 – 18 August 2017

Filed Under: RSS Kosmos

Week in Images

18.08.2017 by Kaido Reivelt

Filed Under: RSS Kosmos

The Eclipse Megamovie Project will release its first results Monday

18.08.2017 by Kaido Reivelt

You can send in your photos of the eclipse as part of this historic effort.

Filed Under: RSS Kosmos

Failed stars may act more like giant planets

18.08.2017 by Kaido Reivelt

They form the same as stars, but have the kind of wild weather typically seen on Jupiter or Neptune.

Filed Under: RSS Kosmos

Large Asteroid to Safely Pass Earth on Sept. 1

17.08.2017 by Kaido Reivelt

Asteroid Florence, a large near-Earth asteroid, will pass safely by Earth on Sept. 1, 2017, at a distance of about 4.4 million miles.

Filed Under: RSS Kosmos

Q&A: What Happens During a Total Eclipse?

17.08.2017 by Kaido Reivelt

Photos can’t do justice to the in-person experience, according to an eclipse-chaser at JPL.

Filed Under: RSS Kosmos

An Insider’s Guide to Voyager: 1977-2017

17.08.2017 by Kaido Reivelt

From the first detection of active volcanoes outside Earth to the first up-close images of Neptune, the 40-year Odyssey of NASA’s Voyager mission is full of unforgettable memories.

Filed Under: RSS Kosmos

Large Asteroid to Safely Pass Earth on Sept. 1

17.08.2017 by Kaido Reivelt

Asteroid Florence, a large near-Earth asteroid, will pass safely by Earth on Sept. 1, 2017, at a distance of about 4.4 million miles.

Filed Under: RSS Kosmos

Q&A: What Happens During a Total Eclipse?

17.08.2017 by Kaido Reivelt

Photos can’t do justice to the in-person experience, according to an eclipse-chaser at JPL.

Filed Under: RSS Kosmos

An Insider’s Guide to Voyager: 1977-2017

17.08.2017 by Kaido Reivelt

From the first detection of active volcanoes outside Earth to the first up-close images of Neptune, the 40-year Odyssey of NASA’s Voyager mission is full of unforgettable memories.

Filed Under: RSS Kosmos

Scientists Improve Brown Dwarf Weather Forecasts

17.08.2017 by Kaido Reivelt

Researchers have a new model for explaining how clouds move and change shape in brown dwarfs, using insights from NASA’s Spitzer Space Telescope.

Filed Under: RSS Kosmos

What to Expect When Viewing the Eclipse

17.08.2017 by Kaido Reivelt

NASA’s Eyes on the Eclipse application offers an easy preview of the event for any location.

Filed Under: RSS Kosmos

What to Expect When Viewing the Eclipse

17.08.2017 by Kaido Reivelt

NASA’s Eyes on the Eclipse application offers an easy preview of the event for any location.

Filed Under: RSS Kosmos

Scientists Improve Brown Dwarf Weather Forecasts

17.08.2017 by Kaido Reivelt

Researchers have a new model for explaining how clouds move and change shape in brown dwarfs, using insights from NASA’s Spitzer Space Telescope.

Filed Under: RSS Kosmos

Sentinel-1 speeds up crop insurance payouts

17.08.2017 by Kaido Reivelt

For the first time in India, a state government is using satellites to assess lost crops so that farmers can benefit from speedy insurance payouts.

Filed Under: RSS Kosmos

Sentinel-1 speeds up crop insurance payouts

17.08.2017 by Kaido Reivelt

For the first time in India, a state government is using satellites to assess lost crops so that farmers can benefit from speedy insurance payouts.

Filed Under: RSS Kosmos

ESA’s Proba-3 will create artificial solar eclipses

17.08.2017 by Kaido Reivelt

Astrophysicists are joining sightseers in watching Monday’s total solar eclipse across North America but, in the decade to come, they will be viewing eclipses that last for hours instead of a few minutes – thanks to a pioneering ESA space mission.

Filed Under: RSS Kosmos

ESA’s Proba-3 will create artificial solar eclipses

17.08.2017 by Kaido Reivelt

Astrophysicists are joining sightseers in watching Monday’s total solar eclipse across North America but, in the decade to come, they will be viewing eclipses that last for hours instead of a few minutes – thanks to a pioneering ESA space mission.

Filed Under: RSS Kosmos

Impact of mass gain, tailwind and age on the performance of Usain Bolt from Beijing 2008 to Rio 2016

17.08.2017 by Kaido Reivelt

Despite the impressiveness of the sprints run by Usain Bolt, the question naturally arises of why he
has not been able to break the 100 m sprint world record he set in Berlin (2009). In this paper, we
address such a query by considering Bolt’s cond…

Filed Under: RSS Füüsikaharidus

Calibration of gamma-ray detectors using Gaussian photopeak fitting in the multichannel spectra with a LabVIEW-based digital system

17.08.2017 by Kaido Reivelt

This paper reports on the development of a gamma-ray spectroscopic system for the (i) recording and
(ii) processing of spectra. The utilized data read-out unit consists of a PCI digital oscilloscope,
personal computer and LabVIEW™ programming envir…

Filed Under: RSS Füüsikaharidus

Visualisation of charge dynamics when water droplets move off a hydrophobic surface

17.08.2017 by Kaido Reivelt

The Kelvin water drop generator is often used for educational purposes to visualise how charge is
transferred when water drops separate from a solid. Here, we discuss an alternative and simpler
setup, which allows one to visualise the charge transfer…

Filed Under: RSS Füüsikaharidus

Dynamics of a particle on an axisymmetric surface under gravitational force: a geometric approach

17.08.2017 by Kaido Reivelt

In this paper the problem of a particle constrained to move on an axisymmetric surface embedded in
three-dimensional Euclidean space, under the influence of a gravitational field, is addressed from a
geometrical point of view. Using a covariant geome…

Filed Under: RSS Füüsikaharidus

A quantitative experiment on the fountain effect in superfluid helium

17.08.2017 by Kaido Reivelt

Superfluid helium, a state of matter existing at low temperatures, shows many remarkable properties.
One example is the so called fountain effect, where a heater can produce a jet of helium. This
converts heat into mechanical motion; a machine with n…

Filed Under: RSS Füüsikaharidus

Demonstration of acoustic resonances in a cylindrical cavity applying the photoacoustic technique

17.08.2017 by Kaido Reivelt

In this work we present some experiments which can be performed in college or on the first courses
of university to acquire knowledge about resonant acoustical phenomena in closed cavities in a
tangible way, through experiments based on the photoacou…

Filed Under: RSS Füüsikaharidus

Dynamics of a particle on an axisymmetric surface under gravitational force: a geometric approach

17.08.2017 by Kaido Reivelt

In this paper the problem of a particle constrained to move on an axisymmetric surface embedded in
three-dimensional Euclidean space, under the influence of a gravitational field, is addressed from a
geometrical point of view. Using a covariant geome…

Filed Under: RSS Füüsikaharidus

Impact of mass gain, tailwind and age on the performance of Usain Bolt from Beijing 2008 to Rio 2016

17.08.2017 by Kaido Reivelt

Despite the impressiveness of the sprints run by Usain Bolt, the question naturally arises of why he
has not been able to break the 100 m sprint world record he set in Berlin (2009). In this paper, we
address such a query by considering Bolt’s cond…

Filed Under: RSS Füüsikaharidus

Demonstration of acoustic resonances in a cylindrical cavity applying the photoacoustic technique

17.08.2017 by Kaido Reivelt

In this work we present some experiments which can be performed in college or on the first courses
of university to acquire knowledge about resonant acoustical phenomena in closed cavities in a
tangible way, through experiments based on the photoacou…

Filed Under: RSS Füüsikaharidus

A quantitative experiment on the fountain effect in superfluid helium

17.08.2017 by Kaido Reivelt

Superfluid helium, a state of matter existing at low temperatures, shows many remarkable properties.
One example is the so called fountain effect, where a heater can produce a jet of helium. This
converts heat into mechanical motion; a machine with n…

Filed Under: RSS Füüsikaharidus

Calibration of gamma-ray detectors using Gaussian photopeak fitting in the multichannel spectra with a LabVIEW-based digital system

17.08.2017 by Kaido Reivelt

This paper reports on the development of a gamma-ray spectroscopic system for the (i) recording and
(ii) processing of spectra. The utilized data read-out unit consists of a PCI digital oscilloscope,
personal computer and LabVIEW™ programming envir…

Filed Under: RSS Füüsikaharidus

Visualisation of charge dynamics when water droplets move off a hydrophobic surface

17.08.2017 by Kaido Reivelt

The Kelvin water drop generator is often used for educational purposes to visualise how charge is
transferred when water drops separate from a solid. Here, we discuss an alternative and simpler
setup, which allows one to visualise the charge transfer…

Filed Under: RSS Füüsikaharidus

NASA-led Mission Studies Storm Intensification

16.08.2017 by Kaido Reivelt

A group of NASA and NOAA scientists are teaming up this month on an airborne field campaign to study severe storms in the Northern Hemisphere and what makes them intensify.

Filed Under: RSS Kosmos

NASA-led Mission Studies Storm Intensification

16.08.2017 by Kaido Reivelt

A group of NASA and NOAA scientists are teaming up this month on an airborne field campaign to study severe storms in the Northern Hemisphere and what makes them intensify.

Filed Under: RSS Kosmos

Determination of the Spin and Parity of the ${Z}_{c}(3900)$

16.08.2017 by Kaido Reivelt

Author(s): M. Ablikim et al. (BESIII Collaboration)An analysis of electron-positron collision data has determined the spin and parity of a particle thought to consist of four quarks.[Phys. Rev. Lett. 119, 072001] Published Wed Aug 16, 2017

Filed Under: RSS Teadus

Spin Current Generation Using a Surface Acoustic Wave Generated via Spin-Rotation Coupling

16.08.2017 by Kaido Reivelt

Author(s): D. Kobayashi, T. Yoshikawa, M. Matsuo, R. Iguchi, S. Maekawa, E. Saitoh, and Y. NozakiWe demonstrate the generation of alternating spin current (SC) via spin-rotation coupling (SRC) using a surface acoustic wave (SAW) in a Cu film. Ferromagn…

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Melting and High $P\text{−}T$ Transitions of Hydrogen up to 300 GPa

16.08.2017 by Kaido Reivelt

Author(s): Chang-sheng Zha, Hanyu Liu, John S. Tse, and Russell J. HemleyMeasurements of the melting curve of hydrogen at unprecedentedly high pressures call for a refinement of the theories describing the material.[Phys. Rev. Lett. 119, 075302] Publis…

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Cassini prepares for mission’s end

16.08.2017 by Kaido Reivelt

The spacecraft has entered its final five orbits of Saturn.

Filed Under: RSS Kosmos

Canned space

16.08.2017 by Kaido Reivelt


Technology image of the week: Europe’s largest vacuum chamber, used to test satellites before they fly

Filed Under: RSS Kosmos

Alternative routes to the retarded potentials

16.08.2017 by Kaido Reivelt

Two procedures to introduce the familiar retarded potentials of Maxwell’s equations are reviewed.
The first well-known procedure makes use of the Lorenz-gauge potentials of Maxwell’s equations. The
second less-known procedure applies the retarded…

Filed Under: RSS Füüsikaharidus

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