If you have ever seen the Andromeda Galaxy, M31, in the sky or through a telescope, you’ll find it’s reminiscent of a small blurry, fuzzy patch, almost like a cloud. The cloudy look is similar to looking at the hazy white glow of the milky way’s concentrated disk. But that cloudy view is not all of M31. The galaxy is so far away, around 2.5 Million light years, that you’re only seeing the concentrated light from its central bulge. You’re actually missing a large portion of the galaxy because its just too dim for your eyes to see. If you can take a...
Every time a comet slowly approaches the inner solar system, astronomers get excited. We are hopeless romantics, wishing the new comet will brighten enough to be labeled the next ‘comet of the century.’ Yet we have had our hearts broken before, more often than not. The most recent fizzled comet was nearly two years ago with the burn up of comet ISON as it passed close to the Sun. It made for a spectacular view for SOHO and SDO looking at the Sun, but for the rest of us it was just another heartbreak. But once again we have hope; A...
Rosetta captured comet 67P in all its glory this past week, as it reached perihelion, its closest approach to the Sun. This marks the point where the comet feels the most solar energy, resulting in streams of gas and dust shooting from the nucleus. Rosetta captured a series of images to show the brilliance of the comet. It’s been just over a year since Rosetta first injected itself into orbit around 67P on August 6th, 2014, and it has been hitching a ride around the Sun with the comet ever since, collecting amazing science data and observing the comet through its...
The rendering I’ve been waiting for is finally here! A conceptual video of the flyby of Pluto from far away, leading through closest approach and turning back to see the dark side, all together. This will give you a sense of the motion of New Horizons, and the state of the Pluto system in the Kuiper Belt. The credit goes not just to NASA, but to space enthusiast Björn Jónsson, who created the rendering from the latest Pluto images and data from New Horizons. The strangest part of watching this was the sense of longing I felt as we fly past...
Occasionally it’s strange to see photos from the Curiosity Rover on Mars. Some of them feel distinctly like home. I can almost imagine a person walking by on the soft sand, through the pathway of rocks, and over the horizon, like a traveller navigating the desert. The latest panorama of Mars gives me that feeling in spades. And yet, this rusty world has too thin an atmosphere to allow a human to breathe. It has no water to drink, and intense radiation from the Sun that prevents life from blanketing its surface. It is human, and yet alien. No homo...
I was with my friend and fellow astronomer Jesse Rogerson discussing the fantastic book from xkcd author Randall Munroe, called What if? We were talking about the brilliant analogy used by Munroe when talking about how big a supernova is. The questions asked was “Which of the following is brighter, in terms of the amount of energy delivered to your retina?” 1. A supernova, seen from 150 Million Kilometers, about as far as the Sun is from Earth. 2. The detonation of a Hydrogen Bomb, pressed against your eyeball. What a great question. The answer, surprisingly, is the Supernova, which is...
One of the big questions in astrophysics is about variation of the laws of Physics. The laws we know and are familiar with; angular momentum, gravity, energy, are the same everywhere on Earth. But what about beyond Earth? The universe is so large and so vast, we may be in a local region where the laws of Physics are set, and our laws may be different from a distinct region somewhere else in the universe. The good news is that we can make predictions based on our understanding of physics. And with our powerful telescopes that allow us to view a variety of...
A few weeks back, the Philae lander woke up and began transmitting the coveted science data it had been holding on to for the better part of 2015, waiting for the Sun to shine bright enough to wake it from its deep slumber. As soon as it was able, it transmitted data back to the Rosetta orbiter, which then sent it on its long journey back home to Earth. Now that a few weeks have passed, we can finally see what the first science from the surface of 67P looks like, and determine its true fate. We can clearly see a...
With more than a decade of observations, the Cassini spacecraft has redefined our understanding of the ringed giant Saturn and its diverse moons. Continually working and returning new data, it has achieved significant scientific milestones, along with it’s partner probe Huygens, which dropped down through the thick clouds of mighty moon Titan’s atmosphere in early 2005. Along with a new scientific understanding comes views never-before-seen by human eyes, revealing the artful dance between the gas giant, its moons, and its incredible ring system. One of my favourite photos shows the incredibly beautiful symmetry of the rings. The rotational symmetry in...
Hey hey! It’s a blue moon today! For all those people who have used the phrase ‘Once in a blue moon,’ it finally happened. Turns out that phrase means ‘about once every 2-3 years.’ A blue moon doesn’t mean the moon is changing colour anytime soon, just like a supermoon doesn’t mean the moon actually gains superpowers or gets noticeably bigger. A blue moon is simply the second full moon in a calendar month. The moon orbits the Earth in approximately 29.5 days. This was how months were originally formed. But 12 months x 29.5 days means that we are...
