Wednesday, August 16, 2017

The Landscape Art of Mars

Alexandra Innanen is an Undergraduate Researcher working at PVL for the summer. Along with MSc Giang Nguyen, they've been scouring the Northern Polar Cap of Mars in images, looking at the fine details and trying to deconvolve what role the atmosphere plays in their formation. Along the way, Alexandra has seen more than just thousands of images of dust and ice and had the opportunity (below) to talk a little bit about the aesthetic appreciation of the landscape that one can obtain from orbit. Today she shares with you her top five selections!

By Alexandra Innanen

The North Pole of Mars is a pretty cool place – pun absolutely intended. This summer I’ve joined Giang in looking for patterns in the Martian ice cap, something he talked about in a previous post. I have looked through a truly astronomical number of HiRISE images, nearly 1000 at this point. While many of them do showcase those beautiful patterns we’re looking for (I have been known to punch the air at a particularly uniform set of dunes), a number are what I lovingly refer to as ‘garbage’. Some of these are just flat nothingness, with no distinguishing features to recommend it. Some are more visually interesting, but without any sense or uniformity. These are fairly useless in terms of patterns, but can be fun to look at, and sometimes have neat stories behind them.

I have a folder on my laptop called “Space Stuff” which I could easily rename “Nifty Pictures of Mars” at this point. It’s full of HiRISE images that I looked at and went “well, there’s no pattern there but boy is that cool!” I’m going to show off my top five images here.

Okay, the one at the top of this article is probably the coolest. Should I have ended with it? Is everyone going to leave now? Anyway, this is an avalanche at the edge of the layered deposits of the north pole, which fall off in steep cliffs (reminding me a bit of the Scarborough Bluffs near where I live). You can see the layering in the escarpment, and the edge of the ice in the lower left corner. Here’s some perspective: the dust cloud you can see is about 200 m across. That’s nearly two football fields long. This led me to another image taken in 2008 showing FOUR avalanches, which readers are encouraged to peruse at their leisure.

Wednesday, August 2, 2017

Frozen Moons

This week, Keagan Lee, an Undergraduate Research Assistant working at PVL for the summer reports on some independent reading he has been doing on a fascinating solar system object: Europa. The image above is a well-known mosaic acquired by the Galileo Orbiter, which you can find on the Planetary Photojournal here.

By Keagan Lee

We like to think of Earth being in the “Goldilocks Zone” -- an area in a star system that is not too cold and not too hot so that liquid water can exist on its surface -- as if this is the ideal location in the solar system. We call Earth the “Blue Planet” because it has so much water. Ostensibly, yes. In our neighbourhood, we are the largest host of water; any water that made its way to Mercury (outside of the permanently shadowed polar traps) or Venus would be boiled off instantly, and it is too cold for water to exist in liquid form on Mars, at least currently. But water is much more likely to exist further out in the solar system where the effects of solar radiation are lessened because of the distance from the Sun and, as a consequence, is found in the form of ice. Europa, one of the moons of Jupiter, which is less than 1% the mass of Earth, is estimated to have more than twice the volume of water than Earth!

Tuesday, August 1, 2017

My Summer Internship

As part of the TEPS program, MSc Candidate Elisabeth Smith has spent her summer working at local space engineering firm MacDonald, Dettwiler and Associates, better known to us as MDA. She relates her experiences here.

By Elisabeth Smith

This past May, I started a part-time internship with engineering company MacDonald, Dettwiler & and Associates (or, MDA for short) in Brampton, Ontario – located not too far from York University. MDA was founded in 1969 by John S. MacDonald and Werner Dettwiler, and is likely best known for their development of communications and robotics systems. Perhaps their best-known product is the Canadarm, the robotic arm present on both the International Space Station and the Space Shuttles that is used to grab and move payloads from different spacecraft, especially for the assembly of the ISS.  It also has cameras on it that allows for the inspection of spacecraft.  After the Columbia Space Shuttle disaster in 2003, this became a very important step in future manned space missions. 

Being able to work for such a fantastic company with such an incredible position in the space industry was a very exciting prospect indeed. I would be helping develop a robotic arm that will be used in aircraft manufacturing – a very good fit for me, given my prior internship experience with business jet manufacturer Gulfstream Aerospace. I have always dreamed of working in the space industry, and being at MDA is a great way to achieve that goal. I am also very interested in robotics, and being able to combine my interests in space and robotics was perfect.