If you wanted to look at weather and climate patterns on the Earth, you would put a satellite in orbit and watch the planet for a long time, looking for changes in the cloud layers and measuring wind speeds, etc. It isn’t a stretch to think that we could do the same for another planet, especially since most of the planets in the solar system have atmospheres. Jupiter, being the largest and heaviest planet, also has immense wind speeds and beautiful vortex features, some of which are larger than the Earth. But in order to understand these features, we have...
Every so often we see a new set of images from Pluto, giving us a chance to rediscover it multiple times. It’s like we are experiencing the July fly-by over and over again, and each new set of images reveals something new and exciting. I feel the same sense of excitement and discovery each time I see a new image, realizing that it spent 6 hours as a beam of light crossing the 5 Billion Kilometres of the solar system to connect us to the New Horizons probe, a lonely little piece of human ingenuity flying through the darkness. Here...
Is this a giant hole in space? I show a picture similar to this as I ask this question to students and audiences that I host in my planetarium. Most people answer that it is a black hole, or dark matter, or dark energy, or something strange like that. But the amazing thing is that it is actually a thick cloud of dust that is opaque, letting no visible light from the distant stars pass through. The funny thing is that the cloud is transparent in infrared light, but in the visible spectrum it highlights something interesting about the universe:...
It’s hard to do experiments in space. It costs a boatload of money, takes years of preparation, and even then we can’t get much further than low-Earth orbit. But there is a cheaper alternative to understanding the universe. We can perform experiments on Earth to simulate what happens far beyond our own planet. That’s just what scientists did at the Vertical Gun Range at NASA’s Ames Research Center in California. They found that Ceres is likely a mish-mash of celestial bodies from several billion years of bombardment. Until March of this year, when the Dawn spacecraft entered orbit of the...
We tend to think of the Moon as a boring old rock. “We’ve been there, so we know all there is to know, onto the next one.” But the Moon still holds secrets, and has its surprises. The formation of the Moon through collision of proto-Earth with a Mars-sized object is an idea that can give us a lot of insight into how the Earth formed and what raw materials we started with. But of course to study it we have to see what the Moon is made of in addition to what the Earth’s rocks contain. In recent years,...
In the midst of cooked turkey and a plethora of sides, I have been reaping the benefits of clear skies and doing my best to learn the skills of astrophotography. I spent a good 6 hours from sunset to just past midnight this past Sunday to see what kinds of shots I could get, and document the latest photos and tricks I’ve learned. I’ll start with my latest time lapse video, since that is what I took first. I started as the sun was about to set, and kept the exposure time very low, along with the ISO. I also...
Deep within the Earth, far below the layers of rock that form the crust, and even further below the molten rock of the mantle, lies a hot core of Iron and Nickel. The swirling of the liquid metal creates a flow of charge and produces the magnetic field of the Earth, without which we humans could not survive. But there is still more. At the centre of the Earth, a part of the liquid metal core, the size of Pluto, cooled into a solid ball of Iron and Nickel. When in the Earth’s history did it form? This question has...
Why should a galaxy have bluish spiral arms dotted with red patches and dark lanes. Why should it have a central region that is yellow and spherical rather than flat? Why are they flat to begin with? Because Galaxies are so huge, and made from hundreds of Billions of stars that change over the course of their lives, a galaxy shows the entire life cycle of a star in its own structure. Stars are born along spiral arms, where most of the thick dust and gas clouds are concentrated. The dark dust lanes of spiral arms condense to form stars,...
I went to the movies last night to see ‘The Martian,’ something I have been excited about for a long time. The theatre was packed, and the movie was amazing, both unsurprising facts. I had very few scientific issues with the film, even with low standards for a big screen pic, but mostly due to first thing the screen showed: ‘NASA was heavily consulted to ensure the science in this movie is accurate.’ Way to go Hollywood! My favourite parts of the movie employed some hilarious use of technical definitions. For example, when Mark Watney grows potatoes on Mars, he says...
I’m addicted. I love astrophotography. I find myself spending a lot of time working no the photos, being outside trying to get the perfect shot, learning how to use my camera and other equipment, and putting together a wish list of equipment that will let me do even more! I went outside before sunrise yesterday and managed to snap an hour’s worth of images, adding to an hour from the night before, where I attempted some star trails over the city of Toronto. All I’ve done so far today is play with the photos and learn to make them look...
