I love data visualization. If I didn’t love astronomy and explosions so much, I would probably be in the art form of visualizing data in fascinating ways. Who knows? I may change my life’s work some day. A recent APOD takes the art to a new level. By looking at time sensitive measurements of Gamma Rays from an incredible active galactic nucleus (AGN), we can get an idea of how a gamma ray burst comes at us from so far away, and what the difference is between the usual activity and a true burst of radiation. Each circle represents a...
It has been well established that Galaxies have formed during the last 13.7 Billion years of cosmic evolution. They didn’t just pop into existence, but developed in a long and arduous process that spans immense time. Many of them will continue to flourish for many Billions of years. If Galaxies do indeed have a birth, as has been seen, it stands to reason that they should someday ‘die’ as well. But have we ever seen the death of a galaxy? Have we ever seen the end for a massive collective structure of stars? We have seen galaxies collide and merge...
As we push the limits of our technology, we naturally will find the biggest, the brightest, the smallest, the most extreme, and of course the most distant objects in the universe. We are at the time in history where we are beginning to see the edges of our universe in unprecedented detail. Eventually will will stop finding the biggest, brightest, and most distant, after which point our technology will serve to improve our precision and allow us to peer within these unique objects. Astronomers have used this incredible technology to discover the most distant galaxy in the universe, forming only...
New research using the ESA’s Planck telescope has revealed that the first stars to shine in the universe sprouted up 100 Million years later than originally thought. Studying the universe is like piecing together a 13.8 Billion year story, from the time of the Big Bang to the present. We study objects in the local Galaxy to piece together the present state, and we look further from Earth to see back in time and visit the earlier chapters to determine the long term evolution of the universe. When the universe was 380,000 years old, it was large enough for the...
Last year we received some incredible news about Cosmology and the Big Bang. An experiment devised to find the signature of the inflationary model of the Universe told the world they had done it! The world cheers, as did many scientists; but of course there are always reasons to be sceptical, especially with claims that have such an impact for humanity let alone the science world. And now it seems the scepticism was correct, as the conclusive result has now been deemed inconclusive. This doesn’t mean its false, not by a long shot, but it does mean the research team...
A set of questions I get from kids and adults alike while doing my Astronomy in Action planetarium shows consists of the following: Does the Universe have an end? How big is the Universe? Where is the center of the Universe? What is the ‘Observable Universe?’ How is it different from just saying ‘the Universe?’ First of all, let me say that it is really hard to imagine the Universe as it is, even with a solid understanding of large-scale Physics. This is because there is no analogy in our lives, no reference point in our everyday experience. It’s very...
The Universe is big, in case you weren’t aware. It’s the biggest thing we know of, containing at least 100 Billion Galaxies, each with up to 1 Trillion of their own stars. It’s ludicrously large. How do we know its so big? A major project completed in 2001 surveyed the Galaxies of the local Universe, and what was found can be summed up in the video below, from Reddit. The data is from the 2 Micron All Sky Survey (2MASS), whose goal was to map all the galaxies in the known Universe in Infrared. The colours in the above map show...
Quasars are Galaxies with incredibly massive Black Holes at their centre. These Black Holes are fuelled by a swirling disc of material that can be ejected in a long jet along their axis of rotation, all due to the conservation of angular momentum. This accretion disc can be so hot that it causes the central region of the Galaxy to shine more brightly than the entire Galaxy of stars surrounding it. A Belgian team using the Very Large Telescope (VLT) studied a population of 93 Quasars spread over Billions of Light-Years, and noticed that the rotation axes of the Quasars...
Dark Matter; Dark Energy; We basically use the term ‘dark’ as a cool sounding version of ‘We have no clue what this is.’ But Dark Matter is a better name than ‘We haven’t a clue’ Matter. Over the years, Astronomers have been trying to pinpoint what the stuff actually is that seems to permeate the universe and makes up 26.8% of the entire total energy-mass (Compare this to a paltry 4.9% of ordinary matter, ie the stuff we can see). But now, as per usual, theorists have come up with another possibility for the source of dark matter: moderately sized,...
A Commander Chris Hadfield returns home tonight, the York Universe crew will be focusing on his voyage with a special show, featuring talk of the incredible and inspiring exploits of the first Canadian commander of the International Space Station. Featured in this episode will be an interview with one of the newest Canadian Astronauts, Jeremy Hansen. I was lucky enough to be a part of this interview, and am excited that it will finally reach air time tonight! Also debuting tonight after the York Universe episode, will be my second ‘What’s The Latest?’ podcast, entitled ‘Supernova part 1.’ Find it in...
