Dunlap Award for Innovation in Astronomical Research Tools

CASCA is pleased to announce Dr. Peter Stetson, from NRC-Herzberg, as the 2016 recipient of the Dunlap Award.

Dr. Stetson obtained his Ph.D. in Astronomy at Yale in 1979. After a short research fellowship at Yale he took a Carnegie Fellowship at the Mount Wilson and Las Campanas Observatories, subsequently moving to the Dominion Astrophysical Observatory (DAO) of NRC-Herzberg in 1983.
Dr. Stetson has been the principal research officer at DAO since 2003.
He was elected as a Fellow of the Royal Society of Canada in 2006, and was awarded the George van Biesbroeck Prize of the American Astronomical Society in 2008.

To address the problem of measuring the properties of stars in digital images from the earliest CCDs, Dr. Stetson developed and released the DAOPHOT program in 1986. He has single-handedly maintained, improved, and supported it since then. Countless investigators have used DAOPHOT; the Hubble Space Telescope Key Project to measure the size of the Universe and the Nobel Prize-winning discovery of dark energy are but two transformational scientific results that exploit its photometry. Dr. Stetson’s more recent spectral line measurement code, DAOSPEC, has been adopted by many of the world’s largest optical facilities. Additionally, Dr. Stetson’s carefully calibrated, freely available photometric standard star catalog now exceeds 114,000 objects, and underpins the majority of photometric observations carried out today. Dr. Stetson has also long served as an image structure expert for senior National Research Council engineers, impacting the design of instruments for the nex
t generation of large facilities such as the Thirty Meter Telescope.

CASCA congratulates Dr. Stetson on the receipt of the 2016 Dunlap Award.

Qilak Award

CASCA is pleased to announce Dr. Jaymie Matthews, from the University of British Columbia, as the 2016 recipient of the Qilak Award for Astronomy Communications, Public Education and Outreach.

After obtaining his Ph.D. from the University of Western Ontario in 1987, Dr. Matthews held positions at Western and l’Université de Montréal before moving to the University of British Columbia as a Killam Postdoctoral Fellow in 1988. He obtained tenure at UBC in 2000, and has been a full professor there since 2008.

Dr. Matthews’ dedication and boundless enthusiasm for communicating with the public about astronomy are illustrated by the dozens of outreach activities in which he participates annually, ranging from public presentations, to radio interviews, to campus tours, to TV show consultations. Beyond his legendary teaching reputation at UBC, he has given courses aimed at younger children as well as special lectures in Vancouver’s Downtown Eastside, the First Nations Summer Science Programme, and the Canadian Association of Physics (CAP) undergraduate lecture series, among many others. In recognition of these efforts, Dr. Matthews received the CAP Education Medal in 2002, was named an officer of the Order of Canada in 2006, and received the Queen Elizabeth II Diamond Jubilee Medal in 2012.

Please join CASCA in thanking Dr. Matthews for his selfless dedication to improving public understanding and appreciation of science and astronomy.

2016 Beals Award

CASCA is pleased to announce Dr. Chris Pritchet, from the University of Victoria, as the 2016 recipient of the Carlyle S. Beals Award.

Dr. Pritchet obtained his Ph.D. in Astronomy from the University of Toronto in 1975. After holding positions at the University of British Columbia, the Dominion Astrophysical Observatory and the University of Calgary, Dr. Pritchet has been on faculty in the Department of Physics and Astronomy at the University of Victoria since 1982. He was Department Chair from 1995-1998, and the chair of the 2010-2020 Long Range Plan Committee for Canadian Astronomy. Dr. Pritchet is currently an associate fellow of the CIfAR Cosmology and Gravity program as well as the principal investigator of CANFAR, which coordinates astronomical computing resources across Canada.

Dr. Pritchet’s research in observational cosmology combines the best available technology with sophisticated analysis techniques. His discovery, along with Sidney van den Bergh, of RR Lyrae variable stars in the Andromeda galaxy is recognized as a vital contribution to fixing distance scales in the Local Group. He is a leader of the Supernova Legacy Survey that has provided precise measurements of dark matter and dark energy in the Universe, and he initiated the close galaxy pair study in the Canadian Network for Observational Cosmology redshift survey. He has also produced important results on galaxy mass profiles, globular cluster distributions, and stellar populations of galaxies in the local universe. Dr. Pritchet has mentored over three dozen graduate students and postdoctoral fellows, and has also made important contributions to astronomy education and outreach as a Galileo lecturer of the International Year of Astronomy and the initiator and primary organizer of Vict
oria’s Café Scientifique.

CASCA congratulates Dr. Pritchet on a distinguished career of scientific achievement and community service.

La Médaille de l’ACP pour contributions exceptionnelles à la physique 2016 est décernée à Gilles Fontaine

C’est avec le grand plaisir que la Canadian Astronomical Society / Société Canadienne d’Astronomie se réjouit de cette annonce:

L’Association canadienne des physiciens et physiciennes (ACP) est fière d’annoncer que la Médaille de l’ACP pour contributions exceptionnelles à la physique 2016 est décernée à Gilles Fontaine, Université de Montréal, pour ses travaux exceptionnels mondialement reconnus dans les études théoriques et d’observation sur les naines blanches et les derniers stades de l’évolution des étoiles, dont d’importants apports à l’équation d’état des naines blanches et les études sur les étoiles compactes pulsantes, ainsi que la découverte d’une nouvelle catégorie de sous-naines pulsantes. Son leadership a donné naissance au groupe qui est incontestablement prédominant dans le monde en ce domaine.

(Du communiqué de presse de l’ACP:) Digne héritier de la tradition d’excellence dans le domaine de l’astrophysique au Canada, le professeur Fontaine s’est distingué sur la scène internationale pour la qualité exceptionnelle de ses travaux de recherche en astrophysique stellaire, particulièrement dans l’étude des phases finales de l’évolution stellaire (étoiles naines blanches et sous-naines), ces produits ultimes de l’évolution stellaire pour la grande majorité des étoiles. Il a non seulement jeté les bases d’une véritable théorie de l’évolution des naines blanches, mais il est aussi un des pionniers de leur utilisation comme cosmochronomètres indépendants des différentes composantes de notre galaxie. Il s’est également imposé comme chef de file dans le domaine de l’astérosismologie, cette méthode unique permettant de sonder la structure interne des étoiles par l’étude de leurs « tremblements d’étoile », en combinant à la fois observations et modélisation numérique. L’ensemble de son œuvre scientifique, qui fait école dans le monde, lui a valu de multiples prix et récompenses.

Le communiqué de presse de l’ACP est ici.

Victoria Kaspi wins the Gerhard Herzberg Canada Gold Medal

It is with great pleasure that the Canadian Astronomical Society / Société Canadienne d’Astronomie recognizes and applauds the selection of Dr. Victoria M Kaspi of McGill University in Montreal, Canada to receive the Gerhard Herzberg Canada Gold Medal for Science and Engineering from the Natural Sciences and Engineering Research Council of Canada.

Dr. Victoria M. Kaspi is one of the world’s leading experts on neutron stars, the ancient remnants of the most massive stars in the Milky Way. The most massive stars end their lives as black holes. Less massive stars, however, leave behind celestial objects no bigger than the city of Montreal, yet so dense that just one teaspoon would weigh 100 million metric tonnes.

Dr Kaspi uses the largest and most powerful radio and X-ray telescopes in the world to study the physical behaviour of neutron stars, pulsars and magnetars (neutron stars with very strong magnetic fields). Her seminal research sheds light on how stars evolve, how they die and, ultimately, the very nature of matter under extreme conditions.
Dr Kaspi’s research group has had major impacts in the field of astrophysics, including unique tests confirming Einstein’s long-held theory of general relativity and discovering the fastest rotating star. Her team’s landmark discovery of powerful X-ray bursts from an enigmatic class of stars (a finding that essentially doubles the number of known magnetars in our galaxy) was published in Nature in 2013.

Dr Kaspi received her PhD from Princeton University in 1993. She has received numerous prizes and fellowships, including the Hubble Fellowship, the Annie Jump Cannon Prize of the American Astronomical Society, and has been elected as a fellow of the Royal Society of Canada, the Royal Society of London, and the US National Academy of Sciences.

CASCA congratulates Dr. Kaspi for this well earned recognition of her outstanding contributions to cosmology and to Canadian scientific excellence.

VLA Reveals Spectacular “Halos” of Spiral Galaxies

A study of spiral galaxies seen edge-on has revealed that “halos” of cosmic rays and magnetic fields above and below the galaxies’ disks are much more common than previously thought.


Composite image of an edge-on spiral galaxy with a radio halo produced by fast-moving particles in the galaxy’s magnetic field. In this image, the large, grey-blue area is a single image formed by combining the radio halos of 30 different galaxies, as seen with the Very Large Array. At the center is a visible-light image of one of the galaxies, NGC 5775, made using the Hubble Space Telescope. This visible-light image shows only the inner part of the galaxy’s star-forming region, outer portions of which extend horizontally into the area of the radio halo.

IMAGE CREDIT: Jayanne English (U. Manitoba), with support from Judith Irwin and Theresa Wiegert (Queen’s U.) for the CHANG-ES consortium; NRAO/AUI/NSF; NASA/STScI

SCIENCE CREDIT: Theresa Wiegert, Judith Irwin and the CHANG-ES consortium.

An international team of astronomers used the Karl G. Jansky Very Large Array (VLA) to study 35 edge-on spiral galaxies at distances from 11 million to 137 million light-years from Earth. The study took advantage of the ability of the VLA, following completion of a decade-long upgrade project, to detect radio emission much fainter than previously possible.

“We knew before that some halos existed, but, using the full power of the upgraded VLA and the full power of some advanced image-processing techniques, we found that these halos are much more common among spiral galaxies than we had realized,” said Judith Irwin, of Queen’s University in Canada, leader of the project.

Spiral galaxies, like our own Milky Way, have the vast majority of their stars, gas, and dust in a flat, rotating disk with spiral arms. Most of the light and radio waves seen with telescopes come from objects in that disk. Learning about the environment above and below such disks has been difficult.

“Studying these halos with radio telescopes can give us valuable information about a wide range of phenomena, including the rate of star formation within the disk, the winds from exploding stars, and the nature and origin of the galaxies’ magnetic fields,” said Theresa Wiegert, also of Queen’s University, lead author of a paper in the Astronomical Journal reporting the team’s findings. The paper provides the first analysis of data from all 35 galaxies in the study.

To see how extensive a “typical” halo is, the astronomers scaled their images of 30 of the galaxies to the same diameter, then another of the authors, Jayanne English, of the University of Manitoba in Canada, combined them into a single image. The result, said Irwin, is “a spectactular image showing that cosmic rays and magnetic fields not only permeate the galaxy disk itself, but extend far above and below the disk.”

The combined image, the scientists said, confirms a prediction of such halos made in 1961.

Along with the report on their findings, the astronomers also are making their first batch of specialized VLA images available to other researchers. In previous publications, the team described the details of their project and its goals. The team has completed a series of VLA observations and their latest paper is based on analysis of their first set of images. They now are analyzing additional datasets, and also will make those additional images available to other scientists when they publish the results of the later analyses.

With the data from their study made public, “others can do their own analysis to explore other aspects of these halos and what they can tell us about galaxies and their evolution,” said Marita Krause of the Max-Planck Institute for Radioastronomy in Bonn, Germany.

The data are available at: http://queensu.ca/changes

The National Radio Astronomy Observatory is a facility of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc. This work was supported by the Natural Sciences and Engineering Research Council of Canada.

Original press release: <a href=”https://public.nrao.edu/news/pressreleases/galaxy-halos”>https://public.nrao.edu/news/pressreleases/galaxy-halos</a>.

CFHT data helps New Horizons navigate toward Pluto

Launched January 19 2006, the New Horizons spacecraft is now getting very close to Pluto with a predicted closest approach on Tuesday July 14 at 11:49:57 UTC, 01:00 HST. This will be the first human encounter with the Plutonian world. New Horizons will get there relying on CFHT data.

New Horizons is roughly 2.5 meters (8 feet) across and weighed approximately 480 kilograms (1,050 pounds) – about half a ton – when first fueled. It travels a the tremendous Earth-relative speed of about 16.26 kilometers per seconds (58,536 km/h; 36,373 mph). At this speed however, New Horizons will only be able to make a flyby close to Pluto and will not be able to enter orbit. Entering orbit would mean that operators would have to reduce the craft speed by over 90%, which would require more than 1,000 times the fuel that New Horizons can carry.

Nevertheless, a series of maneuvers are needed for a collisionless approach to Pluto so an accurate mapping of the objects close to or in the Plutonian system is crucial. In order to achieve this, the New Horizons team performed several images scans for smaller objects, for both intrinsic scientific interest, and as potential collision hazards. However, in order to enable the hazard search, New Horizons required a high-precision flux/position reference system.

CFHT discretionary time awarded to JJ Kavelaars at the CADC in 2014 turned out to be the best dataset to do just that. During the 2014A semester, Kavelaars and collaborators used MegaCam to refine Pluto’s astrometric system, improving our knowledge of Pluto’s orbit and aiding the New Horizons pre-encounter hazard search team. The catalog resulting from these observations allows more precise calibration than any other wide field imager currently in operation due to the decade long use of MegaPrime on CFHT and the precise calibration system developed for this camera by Stephen Gwyn at the CADC. CFHT/MegaPrime astrometric reference catalogue is now being fed directly into the navigation process for guiding New Horizons into it’s final encounter with the Pluto system.

Additional information:

CFHT press release

New Horizons website

Contact Information:

Stephen Gwyn
Canadian Astronomical Data Center
Herzberg Institute for Astrophysics

JJ Kavelaars
Canadian Astronomical Data Center
Herzberg Institute for Astrophysics

La Société canadienne d’astronomie se réjouit de l’engagement du Canada pour le financement de la construction du Télescope de trente mètres

VANCOUVER, 7 avril, 2015 – La Société canadienne d’astronomie (CASCA) se réjouit de l’engagement du Canada pour le financement de la construction en partenariat international du Télescope de trente mètres (TMT), tel qu’annoncé hier soir par le Premier ministre Stephen Harper au Centre spatial H.R. MacMillan de Vancouver.

“Le TMT constitue la plus haute priorité du plan à long terme pour l’astronomie et l’astrophysique au Canada, afin d’assurer la continuité de notre leadership international dans ce domaine. Les astronomes canadiens souligneront pendant des décennies la nouvelle annoncée aujourd’hui comme étant un moment critique dans la consolidation de notre excellence dans ce domaine», a déclaré Christine Wilson, présidente de la CASCA et co-présidente de la Coalition pour l’astronomie canadienne.

Le TMT est un télescope révolutionnaire conçu et dessiné par des astronomes canadiens et l’industrie canadienne travaillant de concert avec leurs partenaires de la Chine, de l’Inde, du Japon, de l’Université de Californie et de l’Institut de technologie de Californie. Le TMT sera presque 100 fois plus puissant que le meilleur télescope actuel. Il examinera la formation des premières étoiles dans l’univers, le trou noir au centre de la Voie Lactée et les atmosphères et autres propriétés des planètes se trouvant dans les zones habitables d’autres étoiles.

«Le Canada s’est toujours classé parmi les trois premiers pays au monde en matière d’astronomie et d’astrophysique, et ce succès est directement lié à notre capacité de concevoir les meilleures installations astronomiques au monde et de pouvoir y accéder, comme c’est le cas pour le TMT. C’est un grand jour pour l’astronomie canadienne alors que nous venons d’assurer notre accès à long terme au télescope terrestre le plus puissant au monde”, a déclaré Mme Wilson.

La Société canadienne d’astronomie (CASCA) s’est jointe à la Coalition canadienne pour les partenaires en astronomie du secteur universitaire et de l’industrie pour applaudir cette annonce du premier ministre.

“Les astronomes canadiens sont responsables de certaines des plus grandes découvertes dans ce domaine, et le TMT saura inspirer une nouvelle génération de jeunes canadiens à poursuivre une carrière en science. On s’attend à ce que les découvertes qui découleront du TMT apportent des transformations majeures en astronomie, autant au niveau canadien qu’international. Il s’agit d’un projet unique qui marquera toute une génération, et dont tous les canadiens peuvent être très fiers », a déclaré Ray Carlberg, directeur du Projet canadien TMT.

À propos de la Société canadienne d’astronomie / Canadian Astronomical Society

La Société canadienne d’astronomie a été fondée en 1971 et incorporée en 1983 en tant que société d’astronomes professionnels. La Société se consacre à la promotion et à l’avancement de la connaissance de l’univers en se vouant à la recherche et à l’éducation. Le plan à long terme pour l’astronomie et l’astrophysique, ou LRP, permet d’assurer la continuité de notre leadership international dans ce domaine.

Le LRP définit les priorités relatives à la participation canadienne à la prochaine génération de projets astronomiques mondiaux, conjuguée aux investissements dans le développement de la technologie au Canada, à la formation de jeunes scientifiques et ingénieurs canadiens, et au leadership intellectuel dans la planification et l’exploitation d’installations par des astronomes canadiens.

Pour de plus amples informations, veuillez contacter:

Christine Wilson
Présidente CASCA
(905) 525-9140 x27483

Leslie Sage
Attaché de presse CASCA
(301) 675-8957

Ray Carlberg
Directeur du projet canadien TMT
(416) 978-2198

Pour plus d’informations sur le TMT, veuillez consulter tmt.org

Birth of Planets Revealed in Astonishing Detail in ALMA’s ‘Best Image Ever’

Astronomers have captured the best image ever of planet formation around an infant star as part of the testing and verification process for the Atacama Large Millimeter/submillimeter Array’s (ALMA) new high-resolution capabilities.

ALMA image of the young star HL Tau and its protoplanetary disk. This best image ever of planet formation reveals multiple rings and gaps that herald the presence of emerging planets as they sweep their orbits clear of dust and gas. Credit: ALMA (NRAO/ESO/NAOJ); C. Brogan, B. Saxton (NRAO/AUI/NSF)

This revolutionary new image reveals in astonishing detail the planet-forming disk surrounding HL Tau, a Sun-like star located approximately 450 light-years from Earth in the constellation Taurus.

ALMA uncovered never-before-seen features in this system, including multiple concentric rings separated by clearly defined gaps. These structures suggest that planet formation is already well underway around this remarkably young star.

“These features are almost certainly the result of young planet-like bodies that are being formed in the disk. This is surprising since HL Tau is no more than a million years old and such young stars are not expected to have large planetary bodies capable of producing the structures we see in this image,” said ALMA Deputy Director Stuartt Corder.

All stars are believed to form within clouds of gas and dust that collapse under gravity. Over time, the surrounding dust particles stick together, growing into sand, pebbles, and larger-size rocks, which eventually settle into a thin protoplanetary disk where asteroids, comets, and planets form.

Once these planetary bodies acquire enough mass, they dramatically reshape the structure of their natal disk, fashioning rings and gaps as the planets sweep their orbits clear of debris and shepherd dust and gas into tighter and more confined zones.

The new ALMA image reveals these striking features in exquisite detail, providing the clearest picture to date of planet formation. Images with this level of detail were previously only seen in computer models and artist concepts. ALMA, living up to its promise, has now provided direct proof that nature and theory are very much in agreement.

“This new and unexpected result provides an incredible view of the process of planet formation. Such clarity is essential to understand how our own Solar System came to be and how planets form throughout the Universe,” said Tony Beasley, director of the National Radio Astronomy Observatory (NRAO) in Charlottesville, Virginia, which manages ALMA operations for astronomers in North America.

HL Tau is hidden in visible light behind a massive envelope of dust and gas. Since ALMA observes at much longer wavelengths, it is able to peer through the intervening dust to study the processes right at the core of this cloud. “This is truly one of the most remarkable images ever seen at these wavelengths. The level of detail is so exquisite that it’s even more impressive than many optical images. The fact that we can see planets being born will help us understand not only how planets form around other stars but also the origin of our own Solar System,” said NRAO astronomer Crystal Brogan.

ALMA’s new high-resolution capabilities were achieved by spacing the antennas up to 15 kilometers apart. This baseline at millimeter wavelengths enabled a resolution of 35 milliarcseconds, which is equivalent to a penny as seen from more than 110 kilometers away.

“Such a resolution can only be achieved with the long baseline capabilities of ALMA and provides astronomers with new information that is impossible to collect with any other facility, including the best optical observatories,” noted ALMA Director Pierre Cox.

These long baselines fulfill one of ALMA’s major objectives and mark an impressive technological and engineering milestone. Future observations at ALMA’s longest possible baseline of 16 kilometers will produce even clearer images and continue to expand our understanding of the cosmos.

“This observation illustrates the dramatic and important results that come from NSF supporting world-class instrumentation such as ALMA,” said Fleming Crim, the National Science Foundation assistant director for Mathematical and Physical Sciences. “ALMA is delivering on its enormous potential for revealing the distant Universe and is playing a unique and transformational role in astronomy.”

Original press release: https://public.nrao.edu/news/pressreleases/planet-formation-alma

Début de la construction du Télescope de Trente-Mètres à Hawaii Accès audiovisuel par Webcast le 7 octobre

Le 7 octobre 2014 auront lieu l’inauguration et une cérémonie de bénédiction pour le télescope du trente mètres (TMT), un projet de $1.4 milliard situé près du sommet du Mauna Kea à Hawaii.

Bien que l’accès au chantier du TMT sera limité en raison de l’environnement précaire et des conditions physiques imposantes du site, la cérémonie sera retransmise en direct par internet.

L’éminent acteur, metteur en scène et auteur, George Takei, bien connu pour sa participation à la série Star Trek, présentera des segments à saveur scientifique durant la presentation. Le chercheur, vulgarisateur scientifique, et chargé de cours, Dr. Robert Hurt, sera l’hôte de cette présentation que l’on pourra suivre à tmt.org/buildingTMT .

Découvertes anticipées d’un observatoire de nouvelle génération

“Nous vivons des moments de grande intensité alors que nous entamons la construction du TMT. Avec son mirroir géant de plus de 30m de diamètre, le TMT offrira des images d’une résolution inégalée pour des systèmes planétaires autour d’étoiles proches et des premières étoiles et galaxies dans l’univers lointain” disait Edward Stone, Directeur Exécutif de l’Observatoire international TMT.

L’Observatoire international TMT (TIO) est un partenariat international dont les membres proviennent de l’Institut de technologie de Californie, les Observatoires astronomiques nationaux de l’académie chinoise des sciences, les Instituts de sciences naturelles au Japon, et l’Université de Californie. L’Inde a récemment reçu l’approbationde son cabinet d’union pour joindre le project TMT cet automne; le Canada a le but de se joindre en tant que membre au printemps 2015.

Les activités préliminaires à Hawaï comprennent la préparation du site et son nivellement; le travail hors site est aussi en plein essor. En Chine, les partenaires s’affairent à concevoir le système d’alignement du telescope équipé de miroirs entièrement articulés et de développer le système de guidage au laser. Le Japon a produit plus de soixante segments en verre à expansion thermique nulle pour le miroir principal et conçoit la structure du télescope en détail. La fabrication du système de soutien du miroir est en cours en Inde. Le module d’optique adaptative est en conception finale et la coupole est prête à être construite au Canada. Le système de contrôle des miroirs est dans sa conception finale en Californie.

“C’est avec un profond respect pour la culture, l’environnement et les valeurs des habitants d’Hawaii, que nous entrevoyons la possibilité de construire cette installation révolutionnaire pour élargir notre compréhension de l’univers, » a déclaré le président du Conseil d’administration OTI, Henry Yang. “Il s’agit d’un partenariat remarquable entre les institutions de ces cinq pays, en coopération avec l’Université d’Hawaï, pour atteindreun objectif visionnaire commun. Nous sommes reconnaissants pour le travail hardu et les contributions remarquables de tant de gens et organismes, y compris le Gordon et Betty Moore Foundation, depuis plus de dix ans, pour atteindre ce jalon si important et significatif”.

Inauguration hawaïenne traditionnelle et la cérémonie de benediction

Le président du Conseil OTI et chancelier de l’Université de Californie à Santa Barbara, Henry Yang, livrera le 7 octobre l’allocution d’ouverture pour l’inauguration et le programme de benediction, suivie du gouverneur d’Hawaii Neil Abercrombie et du maire du comté d’Hawaii, William Kenoi. Une cérémonie traditionnelle Hawaïenne est prévue pour conclure le programme.

“Le TMT s’est engagé auprès du peuple Hawaïen pour respecter le plan créé par le Bureau de gestion de Mauna Kea pour un développement responsible sur le Mauna Kea,”a déclaré Sandra Dawson, directrice au TMT des affaires communautaires Hawaïenne. “Le respect de la communauté et du Mauna Kea est la pierre angulaire de notre gérance harmonieuse.”

Transmission sur l’internet de la cérémonie

Le webcast débutera à 11:15, heure d’Hawaii, le 7 octobre 2014. Visitez TMT.org/buildingTMT pour assister à la cérémonie en direct, découvrir des informations pertinentes, communiquer via les réseaux sociaux, et explorer les archives multimédia de l’événement par la suite. Les téléspectateurs du monde entier peuvent envoyer leurs voeux au TMT (@TMTHawaii) via le hashtag # #buildingTMT.

Traduction du communiqué de presse original: http://www.tmt.org/news-center/site-construction-begins-thirty-meter-telescope-hawaii-watch-worldwide-webcast