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Dawn Captures Sharper Images of Ceres

17.02.2015 by Kaido Reivelt

Craters and mysterious bright spots are beginning to pop out in the latest images of Ceres from NASA’s Dawn spacecraft.

Filed Under: RSS Kosmos

Cool ride!

17.02.2015 by Kaido Reivelt

Thanks to space, some Parisian Metro riders now enjoy a very high-tech commute. A satellite spin-off is paving the way for more comfortable journeys.;

Filed Under: RSS Kosmos

Final goodbye

17.02.2015 by Kaido Reivelt

Human Spaceflight and Operations image of the week: the International Space Station and the last Automated Transfer Vehicle streaking through the sky over Europe

Filed Under: RSS Kosmos

Rosetta in 2015

17.02.2015 by Kaido Reivelt

From close encounters to distant flybys, discover what’s in store for the Rosetta mission as the comet increases in activity

Filed Under: RSS Kosmos

A new way to view Titan: “Despeckle” it

17.02.2015 by Kaido Reivelt

The technique produces radar images of Titan’s surface that are much clearer and easier to look at than the views to which scientists and the public have grown accustomed.

Filed Under: RSS Kosmos

Mystery Mars plume baffles scientists

17.02.2015 by Kaido Reivelt

The plumes were seen rising to altitudes of over 155 miles (250 kilometers) above the same region of Mars on both occasions.

Filed Under: RSS Kosmos

SMOS on acid

17.02.2015 by Kaido Reivelt

With fundamental changes happening to the chemistry of the world’s oceans, salinity information from ESA’s SMOS mission is being used with other Earth observation data to obtain information on ‘the other carbon dioxide problem’ – ocean acidification.

Filed Under: RSS Kosmos

Kas termotuumareaktor peab nii suur olema?

17.02.2015 by Kaarel Piip

Tuumasüntees (ing. k. fusion ) on füüsikute huviobjektiks olnud juba üle poole sajandi . Alates möödunud sajandi keskpaigast on loodetud, et paarikümne aasta jooksul lahendab see inimkonna energiaprobleemid. Paraku on tööstuslike seadmeteni endiselt pikk tee. Üldiselt on peetud kõige perspektiivikamateks tokamak (ven. k. тороидальная камера с магнитными катушками) tüüpi reaktoreid. Praeguseks on neid ehitatud sadu, […]

Filed Under: Teadusuudised Tagged With: Tulevikuenergia

Close encounter

16.02.2015 by Kaido Reivelt

Space science image of the week: Rosetta swoops in for the closest comet flyby yet

Filed Under: RSS Kosmos

Mystery Mars plume baffles scientists

16.02.2015 by Kaido Reivelt

Plumes seen reaching high above the surface of Mars are causing a stir among scientists studying the atmosphere on the Red Planet.

Filed Under: RSS Kosmos

<i>Interstellar</i> technology throws light on spinning black holes

16.02.2015 by Kaido Reivelt

The computed code used to generate the movie’s iconic images revealed that when a camera is close up to a rapidly spinning black hole, peculiar surfaces in space create more than a dozen images of individual stars and of the thin, bright plane of the g…

Filed Under: RSS Kosmos

ALMA sees super stellar nurseries at heart of Sculptor Galaxy

16.02.2015 by Kaido Reivelt

The research suggests that it’s not just the number of stellar nurseries that sets the throttle for a galaxy to create new stars, but also what kind of stellar nurseries are present.

Filed Under: RSS Kosmos

ATV undocking

16.02.2015 by Kaido Reivelt


Time-lapse showing the departure of ATV Georges Lemaître from the International Space Station on 14 February

Filed Under: RSS Kosmos

Kuidas näha väga kiireid laetud osakesi?

16.02.2015 by Kaido Reivelt

Kui laetud osake, näiteks elektron, liigub läbi dielektriku kiirusega, mis on suurem valguse kiirusest selles keskkonnas, siis tekib kiirgus, mida nimetatakse selle avastaja järgi Cherenkovi kiirguseks. Näiteks vees paiknevate tuumareaktorite kiiratav sinine valgus on justnimelt Cherenkovi kiirgus ja selle järgi on võimalik beeta-kiirguse olemasolu kindlaks teha (vt pilti). Sellist, kiirete laetud osakeste poolt tekitatud kiirgust […]

Filed Under: Päevapilt, Valguse aasta 2015

Last ATV reentry leaves legacy for future space exploration

15.02.2015 by Kaido Reivelt

ESA’s fifth automated cargo ferry completed its mission to the International Space Station today when it reentered the atmosphere and burned up safely over an uninhabited area of the southern Pacific Ocean.

Filed Under: RSS Kosmos

Miks on Higgs’i boson nagu täringud?

15.02.2015 by Kaido Reivelt

Higgsi bosoni avastamise aegu kirjutas Andi Hektor Horisondis: “Hurraa! Mõõtmistulemused näitavad, et uus ATLAS ja CMS mõõdavad signaali olulisusega 5-sigma. Mhh, ühmatab nüüd mitteosakestefüüsik! Mida see peaks tähendama? Mitteosakestefüüsikute keeles tähendab see tõenäosust umbes 1/1000000, et tegu ei ole uue osakesega. Osakestefüüsikud on kokku leppinud, et sellist olukorda nimetatakse osakese avastuseks.” Mis on see salapärane […]

Filed Under: Teadusuudised Tagged With: Elementaarosakesed ja LHC eksperiment

Rohelise laseri valgus

14.02.2015 by Kaido Reivelt

Rohelise laseri valgus läheb läbi kolme klaasi, vasakult paremale. Esimeses klaasis on canola õli, teises on vesi, kolmandas oliivõli. Õlis osa kõrge energiaga (rohelisi) footoneid neeldub ning kiirgub madalama energiaga footoneid (fluorestsents), canola õli annab oranzi, oliiviõli punase fluorestsentsi. Veeklaasis näeme rohelist kiirt, mis on lihtsalt rohelise valguse hajumine vees.

Filed Under: Päevapilt

‘Pale Blue Dot’ Images Turn 25

13.02.2015 by Kaido Reivelt

NASA’s Voyager 1 spacecraft showed its love for the solar system, including Earth, with these images on Feb. 14, 1990.

Filed Under: RSS Kosmos

Neutral Naturalness from Orbifold Higgs Models

13.02.2015 by Kaido Reivelt

Author(s): Nathaniel Craig, Simon Knapen, and Pietro Longhi A new class of models, rooted in ideas of extra dimensions of space, is proposed that protect the Higgs mass from large loop corrections.[Phys. Rev. Lett. 114, 061803] Published Fri Feb 13, 2015

Filed Under: RSS Teadus

Laser Filamentation as a New Phase Transition Universality Class

13.02.2015 by Kaido Reivelt

Author(s): W. Ettoumi, J. Kasparian, and J.-P. Wolf A powerful laser beam separates into many smaller filaments that undergo a phase transition similar to fluid percolating through a porous material.[Phys. Rev. Lett. 114, 063903] Published Fri Feb 13,…

Filed Under: RSS Teadus

Week In Images

13.02.2015 by Kaido Reivelt

Our week through the lens: 9-13 February 2015

Filed Under: RSS Kosmos

Happy Valentine’s

13.02.2015 by Kaido Reivelt

Choose your favourite image and send an e-card

Filed Under: RSS Kosmos

Exploded star blooms like a cosmic flower

13.02.2015 by Kaido Reivelt

Astronomers are discovering that some type Ia supernova explosions may not be as symmetric as previously thought.

Filed Under: RSS Kosmos

Mismatched twin stars spotted in the delivery room

13.02.2015 by Kaido Reivelt

The discovery of these stellar twins could provide invaluable insight into the formation and evolution of massive stars, close binaries, and star nurseries.

Filed Under: RSS Kosmos

ATV-5 mission ends

13.02.2015 by Kaido Reivelt

Follow the last moments of ESA’s fifth and final Automated Transfer Vehicle as it leaves a legacy for future space exploration

Filed Under: RSS Kosmos

Follow ESA spacecraft

13.02.2015 by Kaido Reivelt

See the ground tracks of ESA spacecraft and satellites on our interactive map, including the final voyage of Europe’s Automated Transfer Vehicle

Filed Under: RSS Kosmos

LHC kaks aastat kestnud remont hakkab läbi saama

13.02.2015 by Kaido Reivelt

Suur Hadronite Põrguti (Large Hadron Collider ehk LHC) lülitati välja 14. veebruaril 2013, pärast kolm aastat kestnud tööd. Sellest alates on sajad insenerid ja tehnikud parandanud ja täiustanud LHC kiirendeid ja eksperimente, et valmistada need ette tööks kõrgematel energiatel. LHC taaskäivitamine on planeeritud käesolevale, 2015.aastale. Plaanis on eksperimendid, kus põrkuvate osakeste energia on 13TeV (6,5 […]

Filed Under: Teadusuudised

Bending of Light in Quantum Gravity

12.02.2015 by Kaido Reivelt

Author(s): N. E. J. Bjerrum-Bohr, John F. Donoghue, Barry R. Holstein, Ludovic Planté, and Pierre Vanhove

Theorists calculate how quantum gravity effects could alter the bending of light induced by massive objects.

Selected for a Synopsis in Physics
[Phys. Rev. Lett. 114, 061301] Published Thu Feb 12, 2015

Filed Under: RSS Teadus

Earth from Space

12.02.2015 by Kaido Reivelt


Join us Friday, 13 February, at 10:00 CET for the ‘Earth from Space’ video programme. This week features Las Vegas and Lake Mead in the United States

Filed Under: RSS Kosmos

Astronomers catch multiple-star system in first stages of formation

12.02.2015 by Kaido Reivelt

Direct observations of this process give strong support to one of several suggested pathways to producing such systems.

Filed Under: RSS Kosmos

The Very Large Array finds unexpected “storm” at galaxy’s core

12.02.2015 by Kaido Reivelt

The discovery provides important insight on how supermassive black holes can have a catastrophic effect on the galaxies in which they reside.

Filed Under: RSS Kosmos

IXV safely recovered

12.02.2015 by Kaido Reivelt

IXV is hoisted onboard the Nos Aries recovery ship. Looking in great shape, it will now travel back to Europe for further analysis

Filed Under: RSS Kosmos

Suured holograafilised ekraanid ei ole enam ulme

12.02.2015 by Kaido Reivelt

Holograafia ei ole tegelikult surnud, kujutlus holograafilistest avataridest, kes meie asemel koosolekul istuvad või koju kätte toodud ruumilisest maailmast toidab endiselt terve armee teadlaste ja inseneride meeli, kunstnikest, disaineritest ja müügimeestest rääkimata. Seda küll, et kuuekümnendatel suurte lootustega alustatud arendused jäid toppama tehnoloogia taha, see lihtsalt ei olnud veel piisavalt kaugele arenenud. Nüüd on teadlased […]

Filed Under: Teadusuudised, Valguse aasta 2015

Open source virtual reality platform takes on 13 new partners

12.02.2015 by Kaido Reivelt

An open source virtual reality platform reports 13 new partners. This is the Open Source Virtual Reality (OSVR) ecosystem, envisioned as the platform that can bring together companies doing work in a number of areas of virtual reality. OSVR aims to set…

Filed Under: Uncategorized

Tumeaine leitud ka Linnutee südames

11.02.2015 by Kaido Reivelt

Rahvusvaheline astronoomide meeskond on leidnud uusi tõendeid selle kohta, et Linnutee keskmes on märkimisväärses koguses tumeainet. See tulemus kinnitab teadlaste seniseid hinnanguid, edasises töös loodetakse tumeaine jaotus meie galaktikas veel täpsemalt kindlaks teha. Esimesed vihjed tumeaine olemasolule said teadlased galaktikate pöörlemise uurimisest. Selgus nimelt, et galaktikad pöörlevad palju kiiremini, kui võiks ennustada eeldades, et neid […]

Filed Under: Teadusuudised

A New Way to View Titan: ‘Despeckle’ It

11.02.2015 by Kaido Reivelt

Views of Saturn’s hazy moon Titan now appear much sharper, thanks to a technique that greatly improves radar images taken by NASA’s Cassini spacecraft.

Filed Under: RSS Kosmos

Liftoff to splashdown

11.02.2015 by Kaido Reivelt


Relive IXV’s 100 minute reentry success from liftoff at Europe’s Spaceport to splashdown in the Pacific Ocean on 11 February

Filed Under: RSS Kosmos

IXV awaits ship

11.02.2015 by Kaido Reivelt

Job done, IXV floats in the Pacific Ocean awaiting the Nos Aries recovery ship that will hoist it on board for its journey back to Europe for further analysis

Filed Under: RSS Kosmos

Madis Ollikainen: tänavune Tamkivi Reaalteaduste Fondi stipendiaat

11.02.2015 by Kaido Reivelt

Madis Ollikainen erineb peaaegu kõiges veel hiljuti laialt levinud füüsiku stereotüübist. Ei, füüsikud ei ole ujedad ja hajameelsed tüübid, kes teavad küll hästi füüsikat, aga muus elus on üsna saamatud. Seda küll, et Madis teab ametile kohaselt füüsikat, aga ta on ka aktiivne, sirge selja ja jutuga maailmakodanik. Eriti hea on tõdeda, et ta ei […]

Filed Under: Eestist endast, Persoon

Friedrich Kaasik: tänavune Tamkivi Reaalteaduste Fondi stipendiaat

11.02.2015 by Kaido Reivelt

On hea kuulda, et Tamkivi Reaalteaduste Fondi tänavune stipendiaat on  Friedrich Kaasik. Eesti Füüsika Selts teab Friedrichit kui olulist ja asjalikku tegutsejat teaduse populariseerimise rindel. Ta on andnud oma väga väärtusliku panuse nii Teadusbussis, õpikodades, kui ka Teaduslaagrites. Õnnitleme ja soovime jätkuvat jõudu nii teadlasena kui ka teaduse äraseletajana. Loe asjakohast intervjuud fondi kodulehelt.

Filed Under: Eestist endast, Persoon

ESA experimental spaceplane completes research flight

11.02.2015 by Kaido Reivelt

An experimental vehicle to develop an autonomous European reentry capability for future reusable space transportation has completed its mission. ESA’s Intermediate eXperimental Vehicle flew a flawless reentry and splashed down in the Pacific Ocean just west of the Galapagos islands.

Filed Under: RSS Kosmos

Postinflationary Higgs Relaxation and the Origin of Matter-Antimatter Asymmetry

11.02.2015 by Kaido Reivelt

Author(s): Alexander Kusenko, Lauren Pearce, and Louis Yang

A new explanation for why matter dominates in our Universe rests on the idea that the Higgs field hasn’t been constant in time.

Selected for a Synopsis in Physics
[Phys. Rev. Lett. 114, 061302] Published Wed Feb 11, 2015

Filed Under: RSS Teadus

Vega VV04 liftoff

11.02.2015 by Kaido Reivelt


Watch the liftoff of Vega VV04 with ESA’s experimental spaceplane at 13:40 GMT (14:40 CET) on 11 February

Filed Under: RSS Kosmos

IXV in pictures

11.02.2015 by Kaido Reivelt

View the latest pictures of ESA’s reentry mission lasting 100 minutes. IXV will test in flight the lastest technologies and critical systems for future space exploration

Filed Under: RSS Kosmos

Experimental spaceplane completes research flight

11.02.2015 by Kaido Reivelt

The European Space Agency’s Intermediate eXperimental Vehicle flew a flawless reentry and splashed down in the Pacific today.

Filed Under: RSS Kosmos

Mars Rover Nearing Marathon Achievement

10.02.2015 by Kaido Reivelt

Since landing on Mars in January 2004, NASA’s Mars Exploration Rover Opportunity has driven nearly as far as a marathon footrace.

Filed Under: RSS Kosmos

Smile, and the Universe Smiles With You

10.02.2015 by Kaido Reivelt

An upbeat-looking galaxy cluster appears to smile at us in a newly released image from the NASA/ESA Hubble Space Telescope.

Filed Under: RSS Kosmos

National Academy of Engineering Adds Two JPL Members

10.02.2015 by Kaido Reivelt

Two JPL researchers have been elected to the National Academy of Engineering, the highest professional distinction for engineers.

Filed Under: RSS Kosmos

Why Comets Are Like Deep Fried Ice Cream

10.02.2015 by Kaido Reivelt

Origins of crunchy crusts on comets explained in new laboratory research.

Filed Under: RSS Kosmos

ATV to bid farewell to Space Station for last time

10.02.2015 by Kaido Reivelt

ESA’s last Automated Transfer Vehicle will leave the International Space Station on Saturday for its final solo voyage, setting course for a fiery demise that will mark the end of its mission and the programme.

Filed Under: RSS Kosmos

In the hot seat

10.02.2015 by Kaido Reivelt


Human spaceflight and operations image of the week: The Control Centre that will command Europe’s largest spacecraft, the Automated Transfer Vehicle, when it undocks from the International Space Station on Saturday

Filed Under: RSS Kosmos

Classical-to-Quantum Transition with Broadband Four-Wave Mixing

10.02.2015 by Kaido Reivelt

Author(s): Rafi Z. Vered, Yaakov Shaked, Yelena Ben-Or, Michael Rosenbluh, and Avi Pe’er

A key question of quantum optics is how nonclassical biphoton correlations at low power evolve into classical coherence at high power. Direct observation of the crossover from quantum to classical behavior is desirable, but difficult due to the lack of adequate experimental techniques that cover the…

[Phys. Rev. Lett. 114, 063902] Published Tue Feb 10, 2015

Filed Under: RSS Teadus

Universality Far from Equilibrium: From Superfluid Bose Gases to Heavy-Ion Collisions

10.02.2015 by Kaido Reivelt

Author(s): J. Berges, K. Boguslavski, S. Schlichting, and R. Venugopalan A new universality class for many-body systems far from equilibrium is conjectured, providing a link between disparate physical systems ranging from hot plasmas to cold gases.[Phy…

Filed Under: RSS Teadus

Observation of Two New Ξ_{b}^{-} Baryon Resonances

10.02.2015 by Kaido Reivelt

Author(s): R. Aaij et al. (LHCb Collaboration) Researchers report the detection of two new subatomic particles made of three quarks from each of the possible quark families.[Phys. Rev. Lett. 114, 062004] Published Tue Feb 10, 2015

Filed Under: RSS Teadus

ESA astronaut Thomas Pesquet’s space colleagues announced

10.02.2015 by Kaido Reivelt

The next crews to visit the International Space Station, including ESA astronaut Thomas Pesquet, have been announced.

Filed Under: RSS Kosmos

IXV gets ready

10.02.2015 by Kaido Reivelt

ESA’s spaceplane is set for its 100 minute mission tomorrow, 11 February. See how it was done in the timelapse video

Filed Under: RSS Kosmos

NASA spacecraft completes 40,000 Mars orbits

10.02.2015 by Kaido Reivelt

The orbiter is investigating seasonal and longer-term changes, including some warm-season flows that are the strongest evidence so far for liquid water on Mars today.

Filed Under: RSS Kosmos

Europe set to test new spaceplane

10.02.2015 by Kaido Reivelt

In a world first, the European Space Agency will launch and land an unmanned spaceplane February 11 that has no wings but instead features an aerodynamic shape that produces the lift to fly through the atmosphere.

Filed Under: RSS Kosmos

Google helps Lick Observatory stay open with $1 million gift

10.02.2015 by Kaido Reivelt

A resurgence of support from the University of California and several large donations signal a turning of the tide for the world’s first permanent mountaintop observatory.

Filed Under: RSS Kosmos

Google helps Lick Observatory stay open with $1 million gift

10.02.2015 by Kaido Reivelt

A resurgence of support from the University of California and several large donations signal a turning of the tide for the world’s first permanent mountaintop observatory.

Filed Under: RSS Kosmos

Valmistati materjal, millel on negatiivne murdumisnäitaja nähtavas spektri piirkonnas

10.02.2015 by Kaido Reivelt

Ajakirja Nature väljaandest Scientific reports saime lugeda, et esmakordselt on saadud ja ära mõõdetud nähtavas piirkonnas negatiivset murdumisnäitajat omav materjal. Töö on tehtud Hiina teadlaste poolt ja selle rõhk on just materjali valmistamise meetodil. Ja õige ka – oleme ju siinsetelgi veergudel mitut puhku rääkinud, kui keeruline on spektri nähtavasse piirkonda sobivaid metamaterjale valmistada. Juuresolev […]

Filed Under: Teadusuudised, Valguse aasta 2015 Tagged With: Kuidas saada nähtamatuks, nanotehnoloogia

Retsept metamaterjalide valmistamiseks

9.02.2015 by Kaido Reivelt

Metamaterjalid on huvitavad, ei ole probleem neile rakendusi välja mõelda alates ideaalsest valguse neelajast lõpetades superläätsedega. Aga nende valmistamine on väga keeruline. Siiski, vahel on valmistamise protsess ja selle tulemus üsna lihtsalt hoomatav. Käesoleval juhul on Jaapani ja Taiwani teadlased valmistanud metamaterjali mis erinevalt varasematest on isotroopne, st selle omadused ei sõltu langeva valguse suunast […]

Filed Under: Teadusuudised, Valguse aasta 2015 Tagged With: Kuidas saada nähtamatuks

NASA Spacecraft Completes 40,000 Mars Orbits

9.02.2015 by Kaido Reivelt

NASA’s Mars Reconnaissance Orbiter has exceeded 40,000 trips around Mars and continues to study patterns of change on the Red Planet.

Filed Under: RSS Kosmos

A sweet martian treat

9.02.2015 by Kaido Reivelt

Space Science Image of the Week: This surprising view of the Red Planet, courtesy of Mars Express, shows chocolate, caramel and cream-coloured swirls encircling the south pole

Filed Under: RSS Kosmos

Composite-Light-Pulse Technique for High-Precision Atom Interferometry

9.02.2015 by Kaido Reivelt

Author(s): P. Berg, S. Abend, G. Tackmann, C. Schubert, E. Giese, W. P. Schleich, F. A. Narducci, W. Ertmer, and E. M. Rasel

By keeping its atomic components in the same state, a team was able to reduce one typical source of noise in a rotation-measuring device.

Selected for a Synopsis in Physics
[Phys. Rev. Lett. 114, 063002] Published Mon Feb 09, 2015

Filed Under: RSS Teadus

Measuring the Transverse Spin Density of Light

9.02.2015 by Kaido Reivelt

Author(s): Martin Neugebauer, Thomas Bauer, Andrea Aiello, and Peter Banzer Under certain conditions the spin of photons can acquire an unusual transverse component. Using intensity differences in the far-field, the transverse spin density is experimen…

Filed Under: RSS Teadus

Synthesis of Programmable Reaction-Diffusion Fronts Using DNA Catalyzers

9.02.2015 by Kaido Reivelt

Author(s): Anton S. Zadorin, Yannick Rondelez, Jean-Christophe Galas, and André Estevez-Torres

Strands of DNA can be used to generate waves of chemical reactions with programmable shape and velocity.

Selected for a Synopsis in Physics
[Phys. Rev. Lett. 114, 068301] Published Mon Feb 09, 2015

Filed Under: RSS Teadus

Watch IXV launch

9.02.2015 by Kaido Reivelt

Join us for the launch of Europe’s experimental spaceplane, scheduled for 13:00 GMT (14:00 CET) on 11 February. Streaming starts at 12:45 GMT (13.45 CET)

Filed Under: RSS Kosmos

First pair of merging stars destined to become supernova found

9.02.2015 by Kaido Reivelt

A team of astronomers has discovered a close pair of white dwarf stars in a planetary nebula that have a total mass of about 1.8 times that of the Sun.

Filed Under: RSS Kosmos

Garage48 ”Hardware & Arts” Physicumis

9.02.2015 by Aile Tamm

 6.-8. veebruaril toimus uhiuues Tartu Physicumi hoones Garage48 ”Hardware & Arts”. Garage48 on üritus, mis võimaldab iduettevõtetel erinevaid ärilisi algatusi ellu viia. See aasta osales üle saja elektrooniku, programmeerija, inseneri, arhitekti, turundaja ja projektijuhi ning nad pidid 48 tunni jooksul oma idee müügikõlbulikuks realiseerima. Selleks pidid nad valmis saama riistvaratoote, mida toetas arvutiprogramm, interneti teenus, mobiilirakenduse vms. Lisaks sellele töötasid nad […]

Filed Under: Eestist endast, Teated Tagged With: Tehnovidinad

IXV mission timeline

9.02.2015 by Kaido Reivelt

An annotated timeline of the most critical events during the IXV mission. ESA’s wingless spaceplane is set for liftoff on a Vega rocket from Kourou, French Guiana, 11 February 2015.

Filed Under: RSS Kosmos

Söövitusmeetod aitab 2-D struktuuridest luua 3-dimensionaalseid

8.02.2015 by Kaido Reivelt

Tänapäevases kaugsides kannab valgus digitaalset informatsiooni kilomeetrite taha vaid sekunditega. Kohandatud optilised materjalid kontrollivad valgussignaale. Teadlased Berliini, Louvain’i ja Karlsruhe Tehnoloogia Instituutidest esitavad ajakirjas Advanced Functional Materials meetodit footonkristallide tootmiseks. Nende optilised omadused on paika pandud mikromeetri suuruste struktuuridega. Antud meetod on kiire, odav ja lihtne ning kasutab osaliselt iseorganiseeruvuse printsiipi. „Materjalide optilisi omadusi saab […]

Filed Under: Teadusuudised, Valguse aasta 2015 Tagged With: Kuidas saada nähtamatuks, nanotehnoloogia

Põgenevate kivide mõistatus lahendatud?

7.02.2015 by Kaido Reivelt

California ja Nevada kuivanud järvede põhjas vedelevate kivide taga on tihti pikad vaod, mis algavad kivi juurest ja võivad ulatuda kümneid meetreid üle kõvaks kuivanud kõrbepinnase. Kivid ise kaaluvad kuni 300 kilo. Mis neid jälgi tekitab? Kas kivid üritavad Las Vegase kasiinodesse murda? Või käib mõni veidrik neid lükkamas? Igal juhul peab jälgede tekitamine keeruline […]

Filed Under: Teadusuudised

Week In Images

6.02.2015 by Kaido Reivelt

Our week through the lens: 2-6 February 2015

Filed Under: RSS Kosmos

Camera to record doomed ATV’s disintegration – from inside

6.02.2015 by Kaido Reivelt

Next Monday, ESA astronaut Samantha Christoforetti will float into Europe’s space ferry to install a special infrared camera, set to capture unique interior views of the spacecraft’s break-up on reentry.

Filed Under: RSS Kosmos

Planck mission explores the history of our universe

6.02.2015 by Kaido Reivelt

The latest data release is providing insights on the first stars, dark energy, and cosmic structure.

Filed Under: RSS Kosmos

Curiosity analyzing sample of martian mountain

6.02.2015 by Kaido Reivelt

Preliminary results suggest the area had acidic ancient conditions

Filed Under: RSS Kosmos

Fluorestseeruvad nanotorud – uus aken aju ehitusse

6.02.2015 by Kaido Reivelt

Stanfordi Ülikooli teadlased töötasid hiljuti välja maailma esimese mitteinvasiivse pildistustehnoloogia, mis suudab tuvastada hiire aju veresoontes asuvaid kuni mikromeetrise läbimõõduga struktuure. Meetodis süstitakse hiire ajusse ühekihilisi süsiniknanotorusid (ingl. k. single-walled carbon nanotubes) ja detekteeritakse nende kiiratavat valgust. Veresoonte struktuuri ja seal oleva vere voolamist on erakordselt oluline teada näiteks insuldi, dementsuse ja ajukasvajate ravimisel. Tänapäeval tugineb ajust kujutise saamine peamiselt […]

Filed Under: Rakenduslik teadus, Teadusuudised, Valguse aasta 2015 Tagged With: nanotehnoloogia, Vaata sissepoole

Lisbon

6.02.2015 by Kaido Reivelt

Earth observation image of the week: a Sentinel-1 radar image of Portugal’s capital, also featured on the Earth from Space video programme

Filed Under: RSS Kosmos

Latest Galileo satellites reach launch site

6.02.2015 by Kaido Reivelt

Another two Galileo satellites have touched down in French Guiana ready to take their place in Europe’s satellite navigation constellation.

Filed Under: RSS Kosmos

What’s new about Europe’s reentry mission?

6.02.2015 by Kaido Reivelt

ESA’s experimental spaceplane, poised for liftoff on Vega, is set to showcase the latest technologies and critical systems to extend Europe’s capability for space exploration.

Filed Under: RSS Kosmos

Dawn Gets Closer Views of Ceres

5.02.2015 by Kaido Reivelt

NASA’s Dawn spacecraft, on approach to dwarf planet Ceres, has acquired its latest and closest-yet snapshot of this mysterious world.

Filed Under: RSS Kosmos

Planck Mission Explores the History of Our Universe

5.02.2015 by Kaido Reivelt

New data from Planck are helping scientists better understand the history and fabric of our universe, as well as our own Milky Way galaxy.

Filed Under: RSS Kosmos

NASA’s Curiosity Analyzing Sample of Martian Mountain

5.02.2015 by Kaido Reivelt

NASA’s Curiosity Mars rover is analyzing a rock-powder sample collected by using the rover’s drill in a gentler manner than at previous drill targets.

Filed Under: RSS Kosmos

Kuidas näevad välja tõelised laserkuulid?

5.02.2015 by Kaido Reivelt

Laserkuulid on ulmefilmides üsna sagedane nähtus. Aga tegelikkuses? Poola füüsikud T.Fok, Y.Stepanenko ja W.Wegrzynski on oma teravatise laseri justeerimise käigus võtnud vaevaks ja teinud video sellest, kuidas sellise ülivõimsa laseri tekitatud valgusimpulss (“valguskuul”) lendab. Video (vt allpool) näib üsna arusaadav – tõepoolest, midagi helendavat liigub piki koridori.  Aga siin on nii mõndagi seletamist. Esiteks, ükskõik […]

Filed Under: Päevapilt, Valguse aasta 2015

Storage and Retrieval of THz-Bandwidth Single Photons Using a Room-Temperature Diamond Quantum Memory

5.02.2015 by Kaido Reivelt

Author(s): Duncan G. England, Kent A. G. Fisher, Jean-Philippe W. MacLean, Philip J. Bustard, Rune Lausten, Kevin J. Resch, and Benjamin J. Sussman

Diamond crystals enable new ways of storing single photons at room temperature and detecting their entanglement.

Selected for a Synopsis in Physics
[Phys. Rev. Lett. 114, 053602] Published Thu Feb 05, 2015

Filed Under: RSS Teadus

Entangled Absorption of a Single Photon with a Single Spin in Diamond

5.02.2015 by Kaido Reivelt

Author(s): Hideo Kosaka and Naeko Niikura Diamond crystals enable new ways of storing single photons at room temperature and detecting their entanglement.[Phys. Rev. Lett. 114, 053603] Published Thu Feb 05, 2015

Filed Under: RSS Teadus

Earth from Space

5.02.2015 by Kaido Reivelt


Join us Friday, 6 February, at 10:00 CET for the ‘Earth from Space’ video programme. This week features a Sentinel-1 radar image over the metropolitan area of Portugal’s capital, Lisbon

Filed Under: RSS Kosmos

A brand new sky

5.02.2015 by Kaido Reivelt


New Planck maps uncover the ‘polarised’ light from the early Universe, revealing that the first stars formed much later than previously thought

Filed Under: RSS Kosmos

Hubble captures rare triple-moon conjunction

5.02.2015 by Kaido Reivelt

These so-called Galilean satellites complete orbits around Jupiter with durations ranging from two to 17 days.

Filed Under: RSS Kosmos

The Lunar Reconnaissance Orbiter discovers lunar hydrogen more abundant on Moon’s pole-facing slopes

5.02.2015 by Kaido Reivelt

Explorers are excited because these deposits could be mined if they are sufficiently abundant.

Filed Under: RSS Kosmos

New Horizons returns new images of Pluto

5.02.2015 by Kaido Reivelt

These are the first photos of the Pluto system for the spacecraft’s optical navigation phase of the mission.

Filed Under: RSS Kosmos

NASA Aircraft, Spacecraft Aid Atmospheric River Study

4.02.2015 by Kaido Reivelt

NASA is part of a major field campaign studying intense atmospheric river storms from the ocean, land, air and space.

Filed Under: RSS Kosmos

Glow in the Dark Matter: Observing Galactic Halos with Scattered Light

4.02.2015 by Kaido Reivelt

Author(s): Jonathan H. Davis and Joseph Silk The dark matter around galaxies might produce a detectable glow at infrared wavelengths.[Phys. Rev. Lett. 114, 051303] Published Wed Feb 04, 2015

Filed Under: RSS Teadus

Estonia joins ESA family

4.02.2015 by Kaido Reivelt


PR N° 5-2015: Estonia took a step further in its relations with ESA by signing the Accession Agreement to the ESA Convention on 4 February 2015, to become the 21st ESA Member State

Filed Under: RSS Kosmos

Rosetta swoops in for a close encounter

4.02.2015 by Kaido Reivelt

ESA’s Rosetta probe is preparing to make a close encounter with its comet on 14 February, passing just 6 km from the surface.

Filed Under: RSS Kosmos

Meade appoints new president

4.02.2015 by Kaido Reivelt

Victor Aniceto, former vice president of sales and marketing, will succeed Joe Lupica.

Filed Under: RSS Kosmos

New infrared view of the Trifid Nebula reveals new variable stars far beyond

4.02.2015 by Kaido Reivelt

They are the first such stars found that lie in the central plane of the Milky Way beyond its central bulge.

Filed Under: RSS Kosmos

Rosetta swoops in for a close encounter

4.02.2015 by Kaido Reivelt

The February 14 flyby will allow the spacecraft to sample the innermost parts of Comet 67P/Churyumov-Gerasimenko’s atmosphere.

Filed Under: RSS Kosmos

Füüsikaviktoriin Spekter

4.02.2015 by Kaido Reivelt

TÜ teaduskool koostöös TÜ koolifüüsika keskuse ja Eesti Füüsika Seltsiga korraldavad 8. aprillil 2015 veebipõhise füüsikaviktoriini „Spekter“. Viktoriin on pühendatud rahvusvahelisele valguse aastale ning sellest oodatakse osa võtma kõiki 8.-10. klasside õpilasi, kes soovivad oma füüsikateadmisi proovile panna. Võistlusest saab osa võtta arvuti, nutitelefoni või tahvelarvuti vahendusel. Viktoriini idee initsiaatori ja vedaja, TÜ teaduskooli haridustehnoloogi […]

Filed Under: Füüsika koolis, Valguse aasta 2015

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