My work takes a couple of different slants. I’m one of the team working to building the UVIS instrument, which is part of a mission designed to look for methane in the atmosphere of Mars.
The mission is called the Trace Gas Orbiter and is meant to be launched to Mars as part of the European Space Agency’s ExoMars programme (though you might have seen in the news that this isn’t looking too hopeful
). I do various jobs like building parts and testing things in the lab. This brings in a lot of aspects of space engineering; thermal, electrical, structural and much more, which is great because the work is really varied.
UVIS is a spectrometer that looks at the ultraviolet and visible part of the electromagnetic spectrum. A spectrometer is just some equipment that splits the light up into its different parts and allows you to look at how the different wavelengths of light are affected.
If we look at the atmosphere of Mars, some of the light is absorbed by different gases. Each gas absorbs different parts of the spectrum, so when we look at Mars we would like something like this:
The dips in the spectrum correspond to different gases (which are helpfully labelled in the diagram!). So in this spectrum we can tell that there is water and methane in the atmosphere of Mars.
The other side of my research is trying to understand processes that happen between the surface and atmosphere of Mars. There are a few people in my office looking at this. For example, one is trying to model how dust devils happen on Mars, one is looking at how we can detect molecules that might be a sign of life and one is doing experiments to see where little microbes might be able to survive underground.
My particular area is working out how methane could be released or removed from the atmosphere. We can see that there is methane on Mars, but no one really knows how it got there. Since most of the methane on Earth is released by living organisms, it would be really exciting if methane pointed towards life on Mars! This means I get to use some pretty fancy environmental chambers to try and simulate what it’s like on Mars and examine the processes that might be involved.
The kind of things I use are big vacuum chambers that we suck all the air out of and cool with liquid nitrogen to make more like Mars. Then I’m going to stick some pretend Mars rock in (we don’t have any of the real stuff!) and do a variety of experiments to see how it behaves.