Ten Years of MOST

June 30, 2013
It isn't very often that Canadians get a chance to celebrate a Canadian space experiment. Maybe it is a lack of science funding, or the smaller population compared with our southern neighbours, or maybe we are just too content to join in with other projects at the expense of our own. In any case, the day before Canada Day we get the chance to celebrate a full decade of data from the MOST experiment.

The Microvariability and Oscillation of STars (MOST) was launched on June 30, 2003 as part of  the Canadian Space Agency's Small Payloads Program and represents Canada's first space science microsatellite and Canada's first space telescope.

The goals of this experiment were to measure light intensity oscillations in stars that are similar to our own, to
determine the age of nearby sub-dwarf stars (which also implies a lower limit on the age of the Universe) and to detect light reflected from exoplanets. This last task is especially exciting, as the spectrum of the reflected light can then be analyzed to determine the chemical composition of the planets and their atmospheres.

MOST is the first instrument in history capable of detecting such signals, and the first to provide direct data about the atmospheres of planets outside of our own solar system. The oscillations of the parent stars  can also be used to determine the age of the stellar systems, giving us new information on how stars and planets form. And all of this amazing scientific discovery is the result of Canadian science!

Happy Canada Day!!




 

Scientific Terminology

June 21, 2013

There is a disturbing trend in the world today in which common society and the scientific community are growing apart, not just in beliefs and knowledge but in even the language used to communicate. This problem has gotten so bad, that there are now courses and textbooks being offered to scientists on how to give public lectures, write popular books, and perhaps most disturbingly on how to properly testify in courts as an expert witness. The language of science and technology is precise, and ...


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The Most Precise Microscope

June 18, 2013
Today marks the official launch of the University of Victoria's new advanced microscopy facility. It was actually installed in March, and tested out by imaging gold flecks, but it has taken several months to complete all of the installation and calibration.

The new device is actually a 4.5 meter tall microscope, called a  scanning transmission electron holography microscope (STEHM). It uses quantum mechanical tunneling of electrons, whose flux depends on the material it is passing through, and...

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Photographing a Distant Planet

June 4, 2013
There was an interesting announcement at the International Astronomical Union conference yesterday (which I must mention was held in Victoria, BC, my home town). A team of astronomer from France have photographed a planet orbiting a distant star. Usually only indirect evidence of such planets is found, and in fact only about a dozen photos have ever been made of extrasolar planets. Until twenty years ago, it wasn't even known if there were any extrasolar planets!

This one has been given the l...
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Thirty Years of Z-Bosons

June 1, 2013
It was on this day, June 1, 1983, that physicists at the CERN facility in Switzerland first confirmed the existence of the Z-boson and provided full confirmation of the GWS model of weak nuclear forces (also known as electroweak theory) first predicted twenty years earlier. Although it had been inferred from other experiments in the 1970s, this was the first direct observations of its existence. (The CERN press release can be viewed here.)

As I have written in past articles, the Universe is kn...
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The Value of Science

May 21, 2013
There has been a lot of commentary in the media lately about the value of fundamental science. The current government of Canada has suggested that the federal funding agencies should shift their focus toward applied science and engineering and research that benefits the business community, and reduce the funding for pure science. Of course there has been a lot written already about the short sightedness of this edict, (and I certainly have my own bias being trained as a theoretical physicist ...
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Happy Birthday Feynman!

May 11, 2013
Today would have been the 95th birthday of the great American theoretical physicist, Richard Feynman. Not only a brilliant researcher, but also an amazing teacher who inspired generations of young minds to dream of science and knowledge, and to view the world in a unique way. Here is an example of Feynman discussing the beauty of a flower.

For those few who are reading this and don't know who he is, here are a few highlights of his life and career:

  • Earned his doctorate at Princeton working in t...

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Matter-Antimatter Asymmetry Observed

April 24, 2013
There is news this morning from the LHCb experiment at the Large Hadron Collider in CERN that they have observed CP-violation in the decays of one of the neutral B-mesons known as B0s. In less technical terms, this means that they have observed one of only four known particles in which matter and antimatter versions decay differently. ( Their formal paper announcing it can be viewed here. )

While this may seem rather academic in nature, it does have a potentially important role in understandin...
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Baby Pictures of the Universe

March 21, 2013
Astrophysicists have just released the most advanced data yet on the early Universe - in essence they have produced a baby picture of the Universe. The results are from the European Space Agency's PLANCK satellite, and measured microwave photons that were produced over 13 billion years ago, when the Universe was only 370,000 years old.

Although background radiation such as this appears to be just noise and static to most electronics, it actually contains quite a lot of information on the early...
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Still the Higgs Boson

March 15, 2013
I am certain that by now the general public is tiring of physicists and science nerds rambling on about the amazing discovery last summer of the Higgs boson, but that will never stop us! This week there have been more news stories about this particle (which serious scientists will never, ever refer to as the 'God Particle'), and I have had a few inquiries as to why it is in the media yet again. 

The reason that it is in the news again is that earlier this week, the LHC teams studying the Higgs...
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About Me


Dr. Chris Bird I am a theoretical physicist & mathematician, with training in electronics, programming, robotics, and a number of other related fields.

   


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