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Signatures of Fractional Exclusion Statistics in the Spectroscopy of Quantum Hall Droplets

9.03.2015 by Kaido Reivelt

Author(s): Nigel R. Cooper and Steven H. Simon Fractional statistics of quantum particles could be measured in rotating droplets of atomic gasses by simply counting spectral lines, according to this theoretical proposal.[Phys. Rev. Lett. 114, 106802] P…

Filed Under: RSS Teadus

Interactions and Stress Relaxation in Monolayers of Soft Nanoparticles at Fluid-Fluid Interfaces

9.03.2015 by Kaido Reivelt

Author(s): Valeria Garbin, Ian Jenkins, Talid Sinno, John C. Crocker, and Kathleen J. Stebe The interactions between soft deformable colloids are measured for ligand coated nanoparticles trapped at an oil-water interface. The ligand layer is seen to do…

Filed Under: RSS Teadus

Joint Analysis of BICEP2/Keck Array and Planck Data

9.03.2015 by Kaido Reivelt

Author(s): P. A. R. Ade et al. (BICEP2/Keck and Planck Collaborations)

A signal in the cosmic microwave background thought to be evidence of inflation in the early Universe can be explained by interstellar dust.

Selected for a Synopsis in Physics
[Phys. Rev. Lett. 114, 101301] Published Mon Mar 09, 2015

Filed Under: RSS Teadus

Thermonuclear supernova ejects galaxy’s fastest star

9.03.2015 by Kaido Reivelt

US 708 is a rapidly rotating, compact helium star likely formed by interaction with a close companion.

Filed Under: RSS Kosmos

A vibrant veil

9.03.2015 by Kaido Reivelt

Space Science Image of the Week: Hubble image unveils the twisted shockwaves of an exploded star

Filed Under: RSS Kosmos

Füüsika e-õpik, aga mitte ainult

8.03.2015 by Kaido Reivelt

Uuringud näitavad, et õppematerjalide korral pakendist ei sõltu eriti midagi, st ainuüksi arvutisse panemine ei tõsta õppematerjali efektiivsust. Kirjastajad jälle ütlevad, et sisu on kuningas. Kas kuningas on alasti? Pigem mitte – kõikvõimalikke e-õppe platvorme ja tarkvarasid toodetakse kümnete ja sadade kaupa. Miks siis Eesti füüsikud oma e-õpiku tarkvara programmeerivad? Sest meile tundub, et ükski […]

Filed Under: Eestist endast, Füüsika koolis

Kuidas peaks teadlane oma tööst rääkima?

7.03.2015 by Kaido Reivelt

William D. Phillips on füüsik, kes võitis 1997. aastal Nobeli füüsikapreemia (koos Claude Cohen-Tannoudji ja Steven Chu’ga), panuse eest laserjahutuse väljatöötamisel. Eesti Entsüklopeedia ütleb: “Laserjahutus on menetlus, millega saavutatakse gaasi aatomite või molekulide kaootilise soojusliikumise aeglustamine (keskmine kiirus 10 –2 m/s, temperatuur kuni 10 –7 K). Põhineb sellel, et valgus avaldab aatomikimbu liikumisele vasturõhku.” Allakirjutanul oli võimalus […]

Filed Under: Arvamus ja Inimesed

NASA Spacecraft Becomes First to Orbit a Dwarf Planet

6.03.2015 by Kaido Reivelt

NASA’s Dawn spacecraft has become the first mission to achieve orbit around a dwarf planet.

Filed Under: RSS Kosmos

Use of Rover Arm Expected to Resume in a Few Days

6.03.2015 by Kaido Reivelt

Managers of NASA’s Curiosity Mars rover mission expect to approve resumption of rover arm movements as early as next week.

Filed Under: RSS Kosmos

NASA Media Telecon Today: First Spacecraft Successfully Enters Orbit Around a Dwarf Planet

6.03.2015 by Kaido Reivelt

NASA will host a media teleconference at 11 a.m. PST (2 p.m. EST) today to discuss the historic arrival of the agency’s Dawn spacecraft at the dwarf planet Ceres.

Filed Under: RSS Kosmos

Supernoova gravitatsiooniläätses

6.03.2015 by Kaido Reivelt

Gravitatsiooniläätse tekkimist kirjeldab üldrelatiivsusteooria, sellest teooriast arusaamiseks tuleb omajagu vaeva näha. Aga me võime ka leppida analoogiaga ning uurida kosmoses toimuvat optikast pärit arusaamisega. Sest gravitatsioonilääts muudab valguse liikumise suunda sarnaselt, nagu seda teeb tavaline optiline lääts (vt esimest pilti). Füüsikalised mehhanismid on loomulikult erinevad – optikas murdub valgus reaalsetes, käegakatsutavates läätsedes, galaktikad kõverdavad oma […]

Filed Under: Päevapilt

Week In Images

6.03.2015 by Kaido Reivelt

Our week through the lens: 2-6 March 2015

Filed Under: RSS Kosmos

Functional Metamirrors Using Bianisotropic Elements

6.03.2015 by Kaido Reivelt

Author(s): V. S. Asadchy, Y. Ra’di, J. Vehmas, and S. A. Tretyakov

A mirror made with metamaterials reflects at a selected angle and only responds to radiation of a specific frequency, while being transparent to other radiation.

Selected for a Synopsis in Physics
[Phys. Rev. Lett. 114, 095503] Published Fri Mar 06, 2015

Filed Under: RSS Teadus

NASA’s Chandra observatory finds cosmic showers halt galaxy growth

6.03.2015 by Kaido Reivelt

Researchers believe that gaseous precipitaton is key to understanding how giant black holes affect the growth of galaxies.

Filed Under: RSS Kosmos

The planet that lost an ocean’s worth of water

6.03.2015 by Kaido Reivelt

About 4 billion years ago, Mars likely had an ocean that covered almost half of the planet’s northern hemisphere.

Filed Under: RSS Kosmos

NASA spacecraft becomes first to orbit a dwarf planet

6.03.2015 by Kaido Reivelt

Dawn’s trajectory puts it on the side of Ceres that faces away from the Sun until mid-April.

Filed Under: RSS Kosmos

Scanning Earth, saving lives

6.03.2015 by Kaido Reivelt

A high-speed camera for monitoring vegetation from space and combating famine in Africa is being adapted to spot changes in human skin cells, invisible to the naked eye, to help diagnose skin diseases like cancer.

Filed Under: RSS Kosmos

Have you ever used a camera on board an interplanetary spacecraft?

6.03.2015 by Kaido Reivelt

In May, the ‘webcam’ on board Mars Express will be available for public imaging requests. We’re inviting schools, science clubs and youth groups to submit proposals for one of eight opportunities to image another planet.

Filed Under: RSS Kosmos

Rover Examining Odd Mars Rocks at Valley Overlook

5.03.2015 by Kaido Reivelt

NASA’s Mars Exploration Rover Opportunity is investigating unusual rocks before reformatting the rover’s memory and continued driving toward “Marathon Valley.”

Filed Under: RSS Kosmos

Prediction and Retrodiction for a Continuously Monitored Superconducting Qubit

5.03.2015 by Kaido Reivelt

Author(s): D. Tan, S. J. Weber, I. Siddiqi, K. Mølmer, and K. W. Murch

Predictions for a quantum measurement are improved by probing the system after the measurement and evolving a model backward in time.

Selected for a Synopsis in Physics
[Phys. Rev. Lett. 114, 090403] Published Thu Mar 05, 2015

Filed Under: RSS Teadus

Earth from Space

5.03.2015 by Kaido Reivelt


Join us Friday, 6 March, at 10:00 CET for the ‘Earth from Space’ video programme. This week features a Sentinel-1A mosaic of Hungary

Filed Under: RSS Kosmos

Hubble sees supernova split into four images by cosmic lens

5.03.2015 by Kaido Reivelt

The multiple images of the exploding star are caused by the powerful gravity of a foreground elliptical galaxy embedded in a massive cluster of galaxies.

Filed Under: RSS Kosmos

One planet, four stars: the second known case of a planet in a quadruple star system

5.03.2015 by Kaido Reivelt

The discovery suggests that planets in quadruple systems might be less rare than once thought.

Filed Under: RSS Kosmos

Sai valmis esimene Extreme Light Infrastructure (ELI) laser

5.03.2015 by Kaido Reivelt

2018.a. saab valmis Extreme Light Infrastructure (ELI) nime kandev taristu Tšehhis, Ungaris ja Rumeenias, kuhu koondatakse tipptasemel laserid teadusuuringute läbiviimiseks. Neil päevil anti teada, et Kalifornias asuvas Lawrence Livermore riiklikus laboratooriumis  on kokku pandud üks neljast laserist, mis annab “esimese valguse” Prahasse ehitatava ELI kiirekanalite (ELI beamlines) kompleksi suure väljundvõimsusega laserikiirde. Milline see laser on? […]

Filed Under: Teadusuudised, Valguse aasta 2015

Planet ‘Reared’ by Four Parent Stars

4.03.2015 by Kaido Reivelt

Astronomers have discovered the second known case of a planet in a quadruple star system.

Filed Under: RSS Kosmos

Single Site on Mars Advanced for 2016 NASA Lander

4.03.2015 by Kaido Reivelt

NASA’s next mission to Mars, InSight, is on track to launch a year from today and to study the Red Planet’s interior to learn about how rocky planets like Earth evolved.

Filed Under: RSS Kosmos

Magnetic Flattening of Stem-Cell Spheroids Indicates a Size-Dependent Elastocapillary Transition

4.03.2015 by Kaido Reivelt

Author(s): Francois Mazuel, Myriam Reffay, Vicard Du, Jean-Claude Bacri, Jean-Paul Rieu, and Claire Wilhelm Magnetic nanoparticles can be used to prepare and characterize multicellular aggregates that serve as model systems for biological tissues.[Phy…

Filed Under: RSS Teadus

Characterizing Quantum Dynamics with Initial System-Environment Correlations

4.03.2015 by Kaido Reivelt

Author(s): M. Ringbauer, C. J. Wood, K. Modi, A. Gilchrist, A. G. White, and A. Fedrizzi

Using an experimental photonic setup, a quantum system initially correlated with its environment is fully characterized for the first time.

[Phys. Rev. Lett. 114, 090402] Published Wed Mar 04, 2015

Filed Under: RSS Teadus

Current-Induced Forces and Hot Spots in Biased Nanojunctions

4.03.2015 by Kaido Reivelt

Author(s): Jing-Tao Lü, Rasmus B. Christensen, Jian-Sheng Wang, Per Hedegård, and Mads Brandbyge

Current-induced forces in nanoconductor junctions control the spatial heat dissipation in the conductor, leading to unexpected heat transport across the junction.

[Phys. Rev. Lett. 114, 096801] Published Wed Mar 04, 2015

Filed Under: RSS Teadus

Giant Enhancement of the Optical Second-Harmonic Emission of WSe_{2} Monolayers by Laser Excitation at Exciton Resonances

4.03.2015 by Kaido Reivelt

Author(s): G. Wang, X. Marie, I. Gerber, T. Amand, D. Lagarde, L. Bouet, M. Vidal, A. Balocchi, and B. Urbaszek A three-order of magnitude increase in the optical second-harmonic emission of WSe2 monolayers is detected by tuning the exciting laser beam…

Filed Under: RSS Teadus

Cooper Pair Splitting by Means of Graphene Quantum Dots

4.03.2015 by Kaido Reivelt

Author(s): Z. B. Tan, D. Cox, T. Nieminen, P. Lähteenmäki, D. Golubev, G. B. Lesovik, and P. J. Hakonen

A pair of quantum dots fabricated on graphene can split Cooper pairs providing a natural source of entangled electrons for quantum information solid state devices.

[Phys. Rev. Lett. 114, 096602] Published Wed Mar 04, 2015

Filed Under: RSS Teadus

Dynamically Controlled Resonance Fluorescence Spectra from a Doubly Dressed Single InGaAs Quantum Dot

4.03.2015 by Kaido Reivelt

Author(s): Y. He, Y.-M. He, J. Liu, Y.-J. Wei, H. Y. Ramírez, M. Atatüre, C. Schneider, M. Kamp, S. Höfling, C.-Y. Lu, and J.-W. Pan

A bichromatic laser can dynamically control the resonant optical emission of an InGaAs quantum dot demonstrating the complete cancellation of spontaneous emission spectral lines from the quantum dot for the first time.

[Phys. Rev. Lett. 114, 097402] Published Wed Mar 04, 2015

Filed Under: RSS Teadus

ESA experts assess risk from exploded satellite

4.03.2015 by Kaido Reivelt

After studying the recent explosive break-up of a US satellite, ESA space debris experts have concluded this event does not increase the collision risk to nearby ESA missions in any meaningful way.

Filed Under: RSS Kosmos

OSIRIS catches glimpse of Rosetta’s shadow

4.03.2015 by Kaido Reivelt

With a resolution of 4 inches (11 centimeters) per pixel, these data from OSIRIS’ Narrow Angle Camera reveal highly detailed structures on Comet 67P’s surface.

Filed Under: RSS Kosmos

Shimmering salt lake

4.03.2015 by Kaido Reivelt

Technology image of the week: ESA’s Proba-V minisatellite captures an Australian salt lake covered with water

Filed Under: RSS Kosmos

Testing to Diagnose Power Event in Mars Rover

3.03.2015 by Kaido Reivelt

NASA’s Curiosity Mars rover is expected to remain stationary for several days for engineering analysis following an onboard fault-protection action on Feb. 27.

Filed Under: RSS Kosmos

Accelerating Cosmological Expansion from Shear and Bulk Viscosity

3.03.2015 by Kaido Reivelt

Author(s): Stefan Floerchinger, Nikolaos Tetradis, and Urs Achim Wiedemann Shear viscosity can lead to an accelerating cosmological expansion without the assumption of a negative effective pressure.[Phys. Rev. Lett. 114, 091301] Published Tue Mar 03, …

Filed Under: RSS Teadus

Macroscopic Discontinuous Shear Thickening versus Local Shear Jamming in Cornstarch

3.03.2015 by Kaido Reivelt

Author(s): A. Fall, F. Bertrand, D. Hautemayou, C. Mezière, P. Moucheront, A. Lemaître, and G. Ovarlez

Discontinuous shear thickening (an abrupt increase in viscosity) of corn starch is accompanied by a change in structure. Density inhomogeneities develop with a low density flowing layer forming around a high density jammed region.

[Phys. Rev. Lett. 114, 098301] Published Tue Mar 03, 2015

Filed Under: RSS Teadus

Tuning Bulk and Surface Conduction in the Proposed Topological Kondo Insulator SmB_{6}

3.03.2015 by Kaido Reivelt

Author(s): Paul Syers, Dohun Kim, Michael S. Fuhrer, and Johnpierre Paglione Transport measurements in samarium hexaboride – a material expected to behave as a topological Kondo insulator – indicate an insulating bulk material with metallic surface sta…

Filed Under: RSS Teadus

Honing skills

3.03.2015 by Kaido Reivelt

Human spaceflight and operations image of the week: mission control team trains for Sentinel-2A launch

Filed Under: RSS Kosmos

The rub with friction: Researchers uncover new rules of friction at microscopic level

3.03.2015 by Kaido Reivelt

Here’s the rub with friction—scientists don’t really know how it works. Sure, humans have been harnessing the power of friction since rubbing two sticks together to build the first fire, but the physics of friction remains largely in the dark.

Filed Under: Uncategorized

Röntgen salvestas 3D pildi viirusest

3.03.2015 by Kaido Reivelt

Bioloogid tahavad teada, milline on nende uuritavate bioloogiliste objektide struktuur. Üks hea füüsikute poolt pakutav meetod on röntgenkristallograafia – kui valgustada röntgenkiirgusega suuri, korrapäraseid kristalle, siis tekivad difraktsioonipildid, mille põhjal on võimalik objekti struktuur kindlaks teha. Selliselt on teada saadud kümnete tuhandete proteiinide, nukleiinhapete jm bioloogiliste molekulide struktuur. Aga see meetod ei tööta, kui uuritavad […]

Filed Under: Teadusuudised, Valguse aasta 2015

NASA spacecraft nears historic dwarf planet arrival

3.03.2015 by Kaido Reivelt

Dawn will be the first mission to successfully visit a dwarf planet when it enters orbit around Ceres on Friday, March 6.

Filed Under: RSS Kosmos

Arcadia High School Takes First Place at Surf Bowl

2.03.2015 by Kaido Reivelt

Arcadia High School won out over 11 other teams at the Ocean Sciences Bowl regional competition held at NASA’s Jet Propulsion Laboratory on Feb. 28.

Filed Under: RSS Kosmos

NASA Spacecraft Nears Historic Dwarf Planet Arrival

2.03.2015 by Kaido Reivelt

NASA’s Dawn spacecraft has returned new images captured on approach to its historic orbit insertion at the dwarf planet Ceres, scheduled for Friday, March 6.

Filed Under: RSS Kosmos

Three-Dimensional Reconstruction of the Giant Mimivirus Particle with an X-Ray Free-Electron Laser

2.03.2015 by Kaido Reivelt

Author(s): Tomas Ekeberg et al. An x-ray laser has imaged the three-dimensional structure of the mimivirus by combining hundreds of measurements on single virus particles.[Phys. Rev. Lett. 114, 098102] Published Mon Mar 02, 2015

Filed Under: RSS Teadus

Earth from Space

2.03.2015 by Kaido Reivelt

Join us Tuesday, 3 March at 14:00 CET as Wolfgang Pitz from Airbus Defence and Space discusses testing the Sentinel-2A satellite

Filed Under: RSS Kosmos

ALMA and VLT probe surprisingly dusty and evolved galaxy

2.03.2015 by Kaido Reivelt

This young and remote object provides tantalizing evidence for the rapid evolution of galaxies after the Big Bang.

Filed Under: RSS Kosmos

Kui laser lõhub laseri

2.03.2015 by Kaido Reivelt

Laserikiir võib näppu kõrvetada. Sellistest näpueksperimentidest on ka hästi teada, et mida suurem intensiivsus, seda ohtlikum kiir. Samamoodi on laserikiire läbipaistvast keskkonnast läbiminekul – suurte intensiivsuste korral võib laserikiir keskkonda kahjusta. Vastavat teadust nimetatakse mittelineaarseks optikaks ning see on väga palju kordi keerulisem, kui koolist tuttav valgusõpetus. Nüüd alljärgnevast pildist: Näidatud on laseri südameks olev […]

Filed Under: Päevapilt, Valguse aasta 2015

Simulating space for JWST

2.03.2015 by Kaido Reivelt

Space Science Image of the Week: Instruments for JWST have been tested in a vacuum chamber to ensure they can withstand the intense cold of space

Filed Under: RSS Kosmos

Energia kursuse õpik nüüd ka elektrooniliselt kättesaadav

1.03.2015 by Kaido Reivelt

Madis Reemanni õpik Energia ilmus juba eelmise aasta lõpul. Tegime nüüd avalikuks ka vastava e-õpiku. Sinna ei ole veel jõutud lisada tarvilikku interaktiivset materjali, aga vähemasti on tekst kõigile kättesaadav. Õpiku leiab aadressilt õpik.füüsika.ee.

Filed Under: Füüsika koolis

Mis on pildil?

28.02.2015 by Kaido Reivelt

See pilt on tavaelust, aga natuke ka mitte. Proovige aru saada, milline on olnud stseen, mida fotograaf on pildistanud? Vihje on pildi allkirjas. Aga ära annab seletada ka kõik kõverused …

Filed Under: Päevapilt, Valguse aasta 2015

Week In Images

28.02.2015 by Kaido Reivelt

Our week through the lens: 23-27 February 2015

Filed Under: RSS Kosmos

Living on the Edge: Stars Found Far from Galaxy Center

27.02.2015 by Kaido Reivelt

Data from NASA’s WISE mission have led to the discovery of two clusters of newborn stars thousands of light-years below the plane of our galaxy.

Filed Under: RSS Kosmos

HAB (high altitude ballooning) – igamehe võimalus stratosfääri lennata

27.02.2015 by Kaido Reivelt

Heeliumipallid ei pruugi olla mingid mänguasjad – 100-200 euro eest on võimalik hankida komplekt, mis tõuseb rohkem kui kümne kilomeetri kõrgusele ning on varustatud raadiosaatja, juhtbloki, GPS’i ja sensoritega põhiliste atmosfääri parameetrite mõõtmiseks. Loomulikult saab heeliumipalliga üles lasta ka kaamera. Ja kui te arvate, allolev pilt on tehtud mõne satelliidi pealt, siis te eksite. Märksõnaks on […]

Filed Under: Füüsika koolis, Lahedad projektid

Astronomers find newborn stars at the edge of our galaxy

27.02.2015 by Kaido Reivelt

The scientists not only found giant molecular clouds thousands of light-years above and below the galactic disk, but also one of them unexpectedly contained two clusters of stars.

Filed Under: RSS Kosmos

Chandra finds intriguing member of black hole family tree

27.02.2015 by Kaido Reivelt

NGC2276-3c has traits similar to both stellar-mass and supermassive black holes.

Filed Under: RSS Kosmos

Brussels

27.02.2015 by Kaido Reivelt

Earth observation image of the week: a false-colour image of Belgium’s capital, also featured on the Earth from Space video programme

Filed Under: RSS Kosmos

Üliõhukesed läätsed suudavad nüüd tekitada ka värvilisi kujutisi

26.02.2015 by Kaido Reivelt

Optilisi läätsesid me oleme kõik näinud. Fotoaparaadi objektiivis on nad suheliselt suured, mobiiltelefonides palju väiksemad. Juba mõnda aega on olemas ka üliõhukesed läätsed paksusega vaid mõned mikromeetrid (nimetagem neid tasaläätsedeks), mida on võimalik kasutada eriti miniatuursetes seadmetes. Seni jäid sellised läätsed hätta värvilise valgusega. Nüüd on suudetud valmistada tasaläätsed, mis suudavad koondada erineva lainepikkusega valgust […]

Filed Under: Teadusuudised, Valguse aasta 2015

New NASA Space Cowboy Successfully Deploys Its ‘Lasso’

26.02.2015 by Kaido Reivelt

Like a cowboy at a rodeo, NASA’s newest Earth-observing satellite, the Soil Moisture Active Passive (SMAP), has triumphantly raised its “arm” and unfurled a huge golden “lasso” (antenna).

Filed Under: RSS Kosmos

New NASA Earth Missions Expand View of Home Planet

26.02.2015 by Kaido Reivelt

Four new NASA Earth-observing missions are collecting data from space – with a fifth newly in orbit – after the busiest year of NASA Earth science launches in more than a decade.

Filed Under: RSS Kosmos

Study of Atmospheric ‘Froth’ May Help GPS Communications

26.02.2015 by Kaido Reivelt

A new study of Earth’s ionosphere, a part of the upper atmosphere, could have applications for better GPS communications.

Filed Under: RSS Kosmos

Search for Higgs Boson Pair Production in the γγbb[over ¯] Final State Using pp Collision Data at sqrt[s]=8  TeV from the ATLAS Detector

26.02.2015 by Kaido Reivelt

Author(s): G. Aad et al. (ATLAS Collaboration) A search for new physics in production of a pair of Higgs bosons finds a modest excess of events, 2.4 standard deviations above the background-only hypothesis.[Phys. Rev. Lett. 114, 081802] Published Thu …

Filed Under: RSS Teadus

Possible Indication of Momentum-Dependent Asymmetric Dark Matter in the Sun

26.02.2015 by Kaido Reivelt

Author(s): Aaron C. Vincent, Pat Scott, and Aldo Serenelli

The presence of a certain type of dark matter in the Sun’s core may solve discrepancies between standard solar models and observations.

Selected for a Synopsis in Physics
[Phys. Rev. Lett. 114, 081302] Published Thu Feb 26, 2015

Filed Under: RSS Teadus

Observing Inflationary Reheating

26.02.2015 by Kaido Reivelt

Author(s): Jérôme Martin, Christophe Ringeval, and Vincent Vennin

Recently available high-precision measurements of the cosmic microwave background constrain the kinematic properties of the reheating era for most of the inflationary scenarios proposed so far.

[Phys. Rev. Lett. 114, 081303] Published Thu Feb 26, 2015

Filed Under: RSS Teadus

Earth from Space

26.02.2015 by Kaido Reivelt


Join us Friday, 27 February, at 10:00 CET for the ‘Earth from Space’ video programme. This week features a false-colour image of Brussels

Filed Under: RSS Kosmos

Pockets of calm protect molecules around supermassive black hole

26.02.2015 by Kaido Reivelt

This is most likely due to dense areas of dust and gas that shield molecules from otherwise lethal radiation.

Filed Under: RSS Kosmos

“Bright spot” on Ceres has dimmer companion

26.02.2015 by Kaido Reivelt

This may be pointing to a volcano-like origin of the spots, but Dawn scientists will wait for better resolution to make geologic interpretations.

Filed Under: RSS Kosmos

CubeSats offered deep-space ride on ESA asteroid probe

26.02.2015 by Kaido Reivelt

Think of it as the ultimate hitchhiking opportunity: ESA is offering CubeSats a ride to a pair of asteroids in deep space.

Filed Under: RSS Kosmos

‘Bright Spot’ on Ceres Has Dimmer Companion

25.02.2015 by Kaido Reivelt

Dwarf planet Ceres continues to puzzle scientists as NASA’s Dawn spacecraft gets closer to being captured into orbit around the object.

Filed Under: RSS Kosmos

NASA’s Curiosity Mars Rover Drills at ‘Telegraph Peak’

25.02.2015 by Kaido Reivelt

Sample-collection drilling that NASA’s Curiosity Mars rover completed Tuesday will likely be the last before the rover departs “Pahrump Hills.”

Filed Under: RSS Kosmos

Gravitational Casimir Effect

25.02.2015 by Kaido Reivelt

Author(s): James Q. Quach

Evidence that gravitational waves induce an attractive force between two closely spaced mirrors could confirm gravity’s quantum nature.

[Phys. Rev. Lett. 114, 081104] Published Wed Feb 25, 2015

Filed Under: RSS Teadus

Quantum Thermodynamics: A Nonequilibrium Green’s Function Approach

25.02.2015 by Kaido Reivelt

Author(s): Massimiliano Esposito, Maicol A. Ochoa, and Michael Galperin

A thermodynamic description for an open quantum system coupled to its surroundings is provided using nonequilibrium Green’s functions.

[Phys. Rev. Lett. 114, 080602] Published Wed Feb 25, 2015

Filed Under: RSS Teadus

Ancient super-bright quasar with massive black hole found

25.02.2015 by Kaido Reivelt

At a distance of 12.8 billion light-years from Earth, this quasar was formed only 900 million years after the Big Bang.

Filed Under: RSS Kosmos

Physicists offer a solution to the puzzle of the origin of matter in the universe

25.02.2015 by Kaido Reivelt

Scientists propose that the matter-antimatter asymmetry could be related to the Higgs boson particle.

Filed Under: RSS Kosmos

Improved vision for James Webb Space Telescope

25.02.2015 by Kaido Reivelt

Key science elements of the James Webb Space Telescope have been upgraded ahead of the observatory’s launch in 2018.

Filed Under: RSS Kosmos

Software satellite

25.02.2015 by Kaido Reivelt

Technology image of the week: Through daily software uploads, this miniature satellite will be a testbed for innovative control methods

Filed Under: RSS Kosmos

Imeline teadus

25.02.2015 by Kaido Reivelt

Lõhe tavakodaniku ning mõnest spetsiifilisest valdkonnast arusaamiseks tarvilike teadmiste ja arusaamade vahel on tavaliselt üüratu. Ja mida aeg edasi, seda hullemaks läheb.

Filed Under: Päevapilt

NASA Briefing to Discuss First Spacecraft Arrival at a Dwarf Planet

24.02.2015 by Kaido Reivelt

JPL will host a briefing Monday, March 2, about the March 6 arrival of NASA’s Dawn spacecraft at the dwarf planet Ceres. The event will be carried live on NASA TV and online.

Filed Under: RSS Kosmos

Latest Selfie from NASA Mars Rover Shows Wide Context

24.02.2015 by Kaido Reivelt

NASA’s Curiosity Mars rover used the camera on its robotic arm to record the pieces of a portrait that shows the rover within a panorama of the area it is studying.

Filed Under: RSS Kosmos

New NASA Soil Moisture Mapper Completes Key Milestone

24.02.2015 by Kaido Reivelt

Mission controllers at JPL today sent commands to unfurl the reflector antenna on NASA’s new Soil Moisture Active Passive (SMAP) observatory, launched Jan. 31.

Filed Under: RSS Kosmos

Out of this world

24.02.2015 by Kaido Reivelt

Watch a replay of our ‘Out of this world’ Google hangout between ESA astronaut Tim Peake and pupils from Rode Heath Primary from Cheshire, UK

Filed Under: RSS Kosmos

ESA’s spaceplane is coming home

24.02.2015 by Kaido Reivelt

ESA’s IXV spaceplane, launched on a Vega rocket on 11 February, is now on its way to Europe for detailed study in Italy.

Filed Under: RSS Kosmos

Actin’ strange

24.02.2015 by Kaido Reivelt

Human spaceflight and operations image of the week: Human endothelial cells and nuclei stained and exposed under a microscope in preparation for space

Filed Under: RSS Kosmos

Last look at Sentinel-2A

24.02.2015 by Kaido Reivelt

Before Sentinel-2A is packed up and shipped to French Guiana for its launch targeted on 12 June, media representatives and specialists got one last look at the second satellite for Europe’s Copernicus programme.

Filed Under: RSS Kosmos

Calling on satellites in alpine rescues

24.02.2015 by Kaido Reivelt

Emergency services rescued 1780 people in the Austrian Alps last year. They can now count on satellites to access maps, send messages, give warnings and stay in contact.

Filed Under: RSS Kosmos

Why comets are like deep-fried ice cream

24.02.2015 by Kaido Reivelt

Research shows that under a crystalline crust should still be very cold and contain more porous amorphous ice.

Filed Under: RSS Kosmos

Laserrelvasüsteemide täiustamine jätkub

24.02.2015 by Kaido Reivelt

Laserrelva põhiidee on ju tegelikult iidvana – legend räägib, et juba Archimedes kasutas nõgusa peegliga koondatud päikeseenergiat, et vaenlase laevastikku hävitada. Mida üks laserrelvgi muud teha saab, kui koondada väga intensiivne valgus sihtmärgile, üritades seda sel teel kahjustada. Neil päevil tuli teade, et Boeing on võitnud 29,5 miljonit dollarit maksva lepingu laserrelva laserikiire stabiliseerimise süsteemi […]

Filed Under: Teadusuudised, Valguse aasta 2015

NASA to Highlight Results from New Earth Missions

23.02.2015 by Kaido Reivelt

Over the past 12 months NASA has added five missions to its orbiting Earth-observing fleet. NASA scientists will share early observations during a media telecon Feb. 26.

Filed Under: RSS Kosmos

Turbulent Black Holes

23.02.2015 by Kaido Reivelt

Author(s): Huan Yang, Aaron Zimmerman, and Luis Lehner A rapidly rotating black hole can have a horizon instability, where certain modes become excited and grow. The behavior is analogous to turbulence in high Reynolds number fluids.[Phys. Rev. Lett. 1…

Filed Under: RSS Teadus

Two Fermions in a Double Well: Exploring a Fundamental Building Block of the Hubbard Model

23.02.2015 by Kaido Reivelt

Author(s): Simon Murmann, Andrea Bergschneider, Vincent M. Klinkhamer, Gerhard Zürn, Thomas Lompe, and Selim Jochim

A simple system consisting of a pair of atoms in a two-site “minicrystal” is able to reproduce the physics of a widely used model of electrons in a solid.

Selected for a Synopsis in Physics
[Phys. Rev. Lett. 114, 080402] Published Mon Feb 23, 2015

Filed Under: RSS Teadus

Scientific spring in isolated Antarctica

23.02.2015 by Kaido Reivelt

In Antarctica, the crew of the French–Italian Concordia research station are preparing for the winter. They have to survive six months of complete isolation – four in darkness because the Sun never rises above the horizon – while they perform science in one of the most barren places on Earth.

Filed Under: RSS Kosmos

Does dark matter cause mass extinctions and geologic upheavals?

23.02.2015 by Kaido Reivelt

A university professor concludes that movement through dark matter may perturb the orbits of comets and lead to additional heating in Earth’s core, both of which could be connected with mass extinction events.

Filed Under: RSS Kosmos

Colours in the cloud

23.02.2015 by Kaido Reivelt

Space Science Image of the Week: Herschel and Spitzer team up to explore the Small Magellanic Cloud, one of our nearest extragalactic neighbours

Filed Under: RSS Kosmos

Kas teadsid, et ka neutronkiirgust kasutades saab asju pildistada?

23.02.2015 by Kaido Reivelt

Neutronkiirgus on vabade neutronite voog, mis tekib tuumalagunemise või tuumasünteesi (tekke) protsessi käigus ja reageerib ettejäävate tuumadega, moodustades uusi isotoope, mis omakorda võivad  kiirgust tekitada. Neutronkiirgusega saab uurida üliväikeses mõõtkavas ainete ehitust (struktuuri)– objektilt väjunud neuronite energiate ja liikumissuundade  järgi tehakse kindlaks mõõdetava objekti sisestruktuur (kasutatakse kristallograafias, vedelate- ja tahkete ainete füüsikas, bioloogias, tahkiste keemias, […]

Filed Under: Teadusuudised

Murphy seadustest ja inimvõimete piiridest

22.02.2015 by Kaido Reivelt

See võib tunduda uskumatu, kuid Murphy oli reaalne isik, kes elas Ameerika Ühendriikides kuni oma surmani 1990. aastal. Kapten Edward A. Murphy Jr. töötas õhujõudude insenerina. Kuigi ta osales oma karjääri jooksul paljudes projektides, pani Murphy seadusele aluse katse, kuhu ta sattus pea kogemata. Aastal 1949 tehti Californias asuvas Edwardsi sõjaväebaasis projekti MX981 katseid, et […]

Filed Under: Arvamus ja Inimesed

Robert H. March’i “Füüsika võlu”, nüüd e-raamatuna

21.02.2015 by Kaido Reivelt

2000.aastal andis kirjastus Ilmamaa välja Robert H. March’i raamatu Physics for poets. Tõlkis Henn Käämbre, eestikeelseks pealkirjaks sai Füüsika võlu. Eesti Füüsika Selts on nüüd selle väärt teose uuesti välja andnud, e-raamatuna aadressi õpik.füüsika.ee. Lugemiseks tuleb küll keskkonda sisse logida, aga muus osas on selle kasutamine vaba. Legend räägib, et pealkirja otsetõlke – Füüsika poeetidele […]

Filed Under: Füüsika koolis, Teated

Directional Antineutrino Detection

20.02.2015 by Kaido Reivelt

Author(s): Benjamin R. Safdi and Burkhant Suerfu

A proposed detector for low-energy antineutrinos would reveal the particles’ trajectories, potentially allowing more detailed studies of Earth’s radioactivity and of nuclear reactors.

[Phys. Rev. Lett. 114, 071802] Published Fri Feb 20, 2015

Filed Under: RSS Teadus

Week In Images

20.02.2015 by Kaido Reivelt

Our week through the lens: 16-20 February 2015

Filed Under: RSS Kosmos

Hubble gets best view of a circumstellar debris disk distorted by a planet

20.02.2015 by Kaido Reivelt

The new images reveal the inner disk around Beta Pictoris and confirm structures predicted by computer simulations.

Filed Under: RSS Kosmos

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