Swapping Mars for Exoplanets: My Time at Harvard University

Providing graduate students with a range of experiences is a key part of helping them figure out what they want to do and where they want to do it once they have completed their degrees. Sometimes that means visiting another university lab, or working for a government agency or finding out what it means to join a team in the industrial sector. For much of the year, PhD student Grace Bischof has been investigating these questions in the lab of Robin Wordsworth at Harvard University.

by Grace Bischof 

Last summer, I received an email telling me that I was eligible to apply to the Michael Smith Foreign Study Supplement, funded through the Natural Sciences and Engineering Research Council of Canada (NSERC). This supplement designates money for graduate students to partake in research internships at institutions abroad to help build global connections. Immediately after receiving the email, I excitedly emailed John to ask if we could talk about possible researchers that I could reach out to about this opportunity to see if they would be interested in having me in their lab for a few months.

At the top of the list of researchers I was interested in connecting with was Dr. Robin Wordsworth at Harvard University. During my time interning at JPL, one of Robin’s papers formed part of the basis for the work I was doing there, so I became familiar with some of his research. About a year later, I saw Robin give two fantastic talks about the environment of Mars at LPSC and the 10th International Conference on Mars. Ironically, though the two talks I’d seen by Robin had been about Mars, and my research at York for the past ~5 years has been about Mars, Robin does not primarily do research on the Martian atmosphere. Though Mars makes up a portion of his research, he also works extensively on modelling the atmospheres of exoplanets. So, for the first time, I wrote and submitted a proposal for research outside of the solar system, characterizing the atmospheres of rocky exoplanets through Lyman-alpha transit spectroscopy.

I learned in late December that my proposal was successful and by the first week of February I was on a plane, flying to Boston, Massachusetts. Unlike the winter of 2023 that I spent in sunny Pasadena happily skipping the cold Toronto winter, Boston has a similar climate to home. Upon landing, I was greeted with below zero temperatures and several inches of snow on the ground. I took a cab to my new home in Cambridge (where Harvard is located), which is just across the Charles River from Boston, feeling equal parts excited and anxious about the next few months ahead of me.

Luckily, I soon learned that I had I little to be anxious about. Though I had never researched atmospheres other than Mars’, I loved the project I was working on (and will write a blog post detailing it later on!). At the beginning of the internship, it felt like I had a mountain of literature to read and understand to even grasp the basics of the project, but I chipped away at it slowly, finding a new love for exoplanetary science. Everyone in Robin’s group was extremely friendly and thoughtful – I learned a lot listening to them talk about their research. Going into this experience, I didn’t think I could enjoy an area of research as much as I love Mars, but I am very pleased to have discovered something new that I find so fascinating. 

One of the best things about working at Harvard is the stunning campus, with its gorgeous centuries-old buildings. A favourite location of mine on campus was the Harvard Museum of Natural History, which also encompasses the Geological and Mineralogical Museum, the Museum of Comparative Zoology, the Harvard University Herbaria, as well as the Peabody Museum of Archaeology and Ethnology. My office was on the upper floor of the Geological Museum, so I was greeted by walls of gorgeous rocks and minerals every day. With a student ID, I was able to get in for free and roam around the floors of these museums. I took lots of pictures of the dinosaur fossils and bones for my 3-year-old nephew, Tate, who is a dinosaur fanatic. My favourite part of the museum was the comparative zoology section, where there are taxidermized animals of every kind you can imagine from all over the world – I kept finding it so fascinating to think that people in Australia would think seeing a kangaroo is as mundane as we find seeing a squirrel in Toronto. 

Under the bones of a Steller’s sea cow, while admiring the giraffe on my right

Since it was my first time in Massachusetts, I spent some time exploring the Boston area with friends and family who came to visit. We walked the Freedom Trail, visiting historic Boston sites like the Paul Revere House, Granary Cemetery where some of the American Founding Fathers are buried, and boarded the U.S.S Constitution, which is the world’s oldest commissioned warship that is still afloat. When my dad visited, we rented a car and spent a morning wandering the streets of Salem, learning more of the Witch Trials that plagued the town in the 1600s. That afternoon, we drove to Concord and visited the Orchard House, where Louisa May Alcott wrote and set the novel Little Women. The 2019 film adaption of Little Women is one of my favourite movies of all time, so exploring the home that inspired the novel was an experience I won’t forget!

 

 Outside of the Orchard House where Louisa May Alcott wrote Little Women 

Before I knew it, it was June 1st, and I was packing my bags to fly back home to Toronto after four incredible months at Harvard. One thing to know about my academic journey while reading this blog is that getting to grad school was not necessarily the easiest for me. Though I loved the content of my undergraduate degree in physics and I worked hard at it, my grades were certainly not the best. When John accepted me into PVL in 2020, he was taking a real chance on me. All that to say: I never thought I would spend any time at an institution as prestigious as Harvard, let alone feel like I belonged there and was proud of the work I was doing. This internship helped me grow confidence in myself both personally and professionally. Five years ago, when I started grad school, I wouldn’t have believed I would gain that confidence, so I am beyond lucky and grateful for this experience – and especially for my experience in PVL which got me here in the first place.

Exploring the Unknown: My First Steps into Planetary Science Research at the PVL

Every summer, we host undergraduates in the lab at the PVL and during the year we bring in volunteers to experience what professional research looks like. Today Ella, one of those undergrads, tells the story of their research journey so far!

by Ruella Ordinaria

Last summer, one of York’s monthly email updates featured an article on Dr. Haley Sapers’ expedition to Nunavut to test Mars rover simulations. The words, ‘astrobiology’ and ‘Mars’ immediately caught my attention. Seeing that Dr Sapers was part of the Planetary Volatiles Lab (PVL), I emailed Dr. Moores for potential opportunities to contribute to his lab. I exchanged an exciting conversation with Dr. John Moores and in the fall, I was assigned to help a PhD student, Grace Bischof, with her research on developing a Mars Microbial Survival (MMS) model. Fast forward, I completed eight months as an undergraduate volunteer at PVL and this summer, I received the NSERC USRA from NSERC and the Lassonde School of Engineering. 

Now, what’s the actual science I’m working on, you may ask? The MMS Model estimates the bioburden reduction on Mars spacecraft during the cruise phase and on the surface. The MMS model calculates the quantity of terrestrial microorganisms remaining on a spacecraft's surface as it is exposed to the effects of the most deleterious space conditions. These include high vacuum, extreme temperatures, solar UV radiation, and ionizing radiation such as solar wind particles (SWPs). This is important because when we send spacecraft to celestial bodies like Mars, we want to prevent forward contamination as it can impact future exploration of extra-terrestrial life on Mars.

My enriching, fulfilling experience while doing research at the PVL, along with the challenges that came with it, has allowed me to grow both academically and professionally. The first challenge I faced was my limited background in space and planetary science. When I joined the PVL, I was entering my second year as a Biochemistry major and I barely knew anything about biochemistry, let alone planetary science. Although I still struggle with this knowledge gap, it has become easier to address by learning through literature searches. In addition, I also struggled significantly with programming. Grace’s project, the MMS Model, uses Python for calculations and graphing. While I had previous experience with HTML / CSS and Python through hackathons and self-learning, I had never worked with numerical modeling or data processing before. Familiarizing myself with these concepts was a challenge, and I essentially had to learn from scratch—from graphing to using various Python libraries for modeling. Google and Stack Overflow became my go-to resources. Fortunately, I am surrounded by passionate Mars experts with many years of research experience who are always willing to answer my questions.

Not only did I learn about all the exciting things about microbial survival, Mars, clouds, and the atmosphere, but I’ve also developed many technical and soft skills such as coding, writing, data collection, collaboration, problem-solving, and critical thinking, just to name a few. This invaluable knowledge and skill are something that I would have never formally gained from my degree alone. Engaging in research early on in my academic career has also allowed me to apply the knowledge I’ve learned in the classroom to real, practical research. My interactions with lab members have given me insight into the workload, the highs and lows, and the overall culture in academia, which has helped clarify my career goals and deepened my passion for planetary science and research.

Most importantly, I learned that research is not instantaneous – it is a journey composed of both productive and unproductive days. I learned that some days you might read 10 papers, write pages of words, and run many lines of code, while on other days, you might spend hours just sitting, thinking, writing then scratching and writing again. Although there have been times when I felt unmotivated, I still look forward to coming to the office every day with the same excitement I had when I first visited Dr. Moores’ office.

And of course, one of the best parts about doing research is the people! My interest in research comes from my aspiration to be part of a community that shares a profound passion for exploring the intricacies of the world and a dedication to immersing themselves in their questions – I found that community in the PVL. Some of my favourite memories are getting last place during bowling, dilly-dallying at Toronto Island, and eating lunch at the Petrie courtyard under the legendary Newton tree (manifesting a Nature paper!). I owe all of my positive research experience to my role models – Grace, Dr. Moores, and all the PVL members. Their support has been incredibly helpful in navigating my research challenges and has kept me curious about the world.

So, what’s next? Tomorrow, the next day, and throughout the rest of the school year, I’ll be heading to the Petrie building to continue my exciting planetary science research! Stay tuned ;)!

The Center of the Universe – My Experience Interning at the Jet Propulsion Laboratory

We often encounter kids in our outreach work who can't wait to be astronauts when they grow up. Somehow this didn't have the same pull for me. Instead, I was mesmerized by the robotic spacecraft  exploring the distant reaches of the solar system. One facility came up over and over again in watching documentary after documentary on PBS about those probes: NASA's Jet Propulsion Laboratory in Pasadena, California. It was a thrill to visit while I was in graduate school. I still don't think I'm completely recovered from having a badge and a parking pass during the 90-sol prime mission of MSL while I was a postdoc!! Because of that, it's always a joy when one of our own here at PVL gets to experience this place for themselves. First there was Raymond, then Emily and, later on, Brittney. Recently, one of our PhD students, Grace Bischof (pictured above), had the opportunity to spend the winter working projects on-lab. She relates her experience below.

By Grace Bischof

In late 2020, I submitted a scientific proposal to the Technologies for Exo-Planetary Science (TEPS) program, with hopes of becoming a TEPS trainee. Upon a successful application, I was able browse through a list of TEPS collaborators with whom I could carry out a four-month long internship (assuming they accepted my inquiry to work with them). There was quite an appealing list of places to intern with – from national collaborators at Canadian universities and within industry, to international collaborators in institutions as far as Japan. There was one collaborator, however, that immediately jumped out of the page for me: Michael Mischna, who is a researcher at the Jet Propulsion Laboratory.

I had seen Michael’s name previously through a former PVL member – Brittney Cooper – who carried out an internship at JPL a couple years before I had arrived in the lab, and whose internship project with Michael inspired the bulk of my master’s thesis. Not only that, but as a member of the Mars Science Laboratory team since 2020, JPL was a place of legends to me, as JPL is the section of NASA that manages planetary robotic missions including the Curiosity rover. The idea of working there myself was something of a dream. In the summer of 2021, John reached out to Michael on my behalf to inquire if there was a place for me to carry out my internship with him, and luckily there was! Not only would I have the opportunity of working with Michael, but I would also be working with Leslie Tamppari, who had been project scientist on the Phoenix mission. 

After a year’s worth of delays due to the lingering pandemic, in January 2023, I packed two giant suitcases and flew down to Pasadena, California to start my adventure. After hopping off the plane at LAX (haha!), I was immediately greeted to views of the San Gabriel mountains, palm trees, and warm weather. I made my way to the house I was renting with four strangers, which luckily was not an internet scam, and spent the first couple of days unpacking and settling into my new home. 

 

(The first picture I took upon arrival in Pasadena. I couldn’t get over the palm trees.)

Although I had somehow found myself in LA during SoCal’s rainiest winter in a couple decades, nothing could rain on my parade that first day at JPL. Even the 5:30 am wake up call to ensure I was on-time for the first day’s onboarding activities felt exciting. I can clearly remember sitting on the LA city-bus as it approached the JPL gates and feeling awe at the opportunity ahead of me. The first day was spent filling in forms, giving my fingerprints, and taking a photo for my new JPL badge. Afterward, I met with Leslie and Michael to discuss the work I would be completing over the next few months, and then I was given a tour of the 168-acre lab by Michael. At JPL, you often need to have your walking shoes on to get from building to building.

Now, I should probably mention the actual science I did while I was at JPL before returning to the fun stuff. The plan was to work on two projects: the first was polishing some work I did in my master’s, using a radiative transfer model to determine the water-ice opacities at the Phoenix mission landing site. The second was to use the Mars Weather, Research, and Forecasting (MarsWRF) general circulation model to simulate the atmospheres of planets around stars with different stellar type, with future plans to expand this work to investigate the effect this would have on land-ocean distribution.

As science so often goes, the first project encountered many issues. A bug was found in the radiative transfer model which resulted in spending much of my time compiling and re-compiling, running and rerunning the model to determine the source of the issue. The MarsWRF work, however, went much more smoothly. I first spent a couple weeks becoming comfortable using the model. MarsWRF is a giant model, with many moving parts. I was set up with a NASA Supercomputing account so that I could run the model with relative quickness (often, this still took hours to days). Once I had the hang of using the model, I ran some cases simulating the ancient Martian environment to send to a team at Rice University who would use the inputs I provided for a Paleo-Mars lake model. Then, I got to work on the stellar-type investigation. I learned how to make changes to the source code of the model (which could be quite a task – altering several files to ensure that all the correct inputs were feeding into the correct scripts). Once I edited MarsWRF such that the user can define the temperature of the star they wish to simulate around, I ran the model for a Mars-like planet with a thin atmosphere around F-, G-, K-, and M-type stars. From this, we determined that, for the atmosphere that was set up, hotter stars will have more shortwave flux reach the surface of such a planet. This work was the first step in understanding exoplanet atmospheres around different stellar type and will eventually be applied more widely to understand the habitability of exoplanets based on star-type. Working on these projects with Leslie and Michael was such a delight, as they were incredibly supportive during this work.

Not only was the work I was doing at JPL extremely cool, but also the lab itself is one of the most incredible places to work. I was fortunate enough to have an office in the Science building (yes, there was big sign atop the front door reading Science). Although the office was very small and windowless, it got the job done, and I had two great office-mates. There was also ample seating around lab when I was craving a change of scenery. Sometimes I would work in the main cafeteria to be around the buzz of people conversing over their morning coffee, but my favourite place to work was the JPL mall. The mall is a big open area near the front of lab, which had plenty of tables set out to work or eat lunch outside in the fresh air. Working all day on the mall was how I managed to get a sunburn in February – a phenomenon I am not used to during Februarys in Canada. 

At JPL, cool things are happening all the time. In the main cleanroom, High Bay 1, they were assembling the Europa Clipper spacecraft when I was there. How amazing it was to look upon the brilliant people putting together a spacecraft that will one day be orbiting the moon of another planet so far out in the solar system. As cool as it is, this was one of the buildings I was only able to access if I brought an American with me. As a foreign national, there were several areas of lab that were off limits without an American escort – they take security very seriously at JPL.

 

The main cleanroom where the Europa Clipper Spacecraft was being assembled. If you look closely, you can see the workers in their bunny suits. Don’t be fooled by the worker at the front left of the picture – that’s a mannequin known as High Bay Bob, who is often moved around to appear to be carrying out various tasks. Currently, Europa Clipper has been removed from the cleanroom for testing, but a livestream of the cleanroom can typically be found on YouTube: https://www.youtube.com/watch?v=yKDA6smS9_k

One of the most memorable days for me was when I was able to visit the Mars Yard to watch the Perseverance Rover’s twin, OPTIMISM (Operational Perseverance Twin for Integration of Mechanisms and Instruments Sent to Mars) out into the yard completing some mobility testing. The Mars Yard is a big, sandy yard that is used to mimic the terrain of Mars. Here, OPTIMISM and MAGGIE (Mars Automated Giant Gizmo for Integrated Engineering – also known as Curiosity’s twin), are brought out for a multitude of testing purposes, including mobility and instrument testing, sample collection, or testing new autonomous algorithms. This day, I was also able to go into the garage to see MAGGIE, which was so incredible after working with the Curiosity rover for the past 3 years.

(Top: Outside in the Mars Yard with OPTIMISM as it completes mobility testing. Bottom: Inside the garage with MAGGIE)

Now, why is the blogpost titled, “The Center of the Universe”? Well, within the Space Flight Operations Facility on lab is the Mission Control Center. Here is where the data from the Deep Space Network antennas in Canberra (Australia), Goldstone (California), and Madrid (Spain) are managed. These giant dishes talk to the spacecraft that are currently exploring the solar system (and beyond for the Voyagers), and that communication is all funneled through the mission control room at JPL. This is also the room from which spacecraft, such as the Curiosity and Perseverance rovers, were landed on the surface of Mars. The story goes that former-JPL director, Charles Elachi, upon thinking about how all the information from the solar system comes into this room once said, “This must be the center of the universe!" There is now a big plaque in the floor in this room declaring it as the Center of the Universe. The JPL mission control center has someone within it, monitoring data around the clock to ensure there are no issues. In fact, since Southern California is so Earthquake-prone, Space Flight Operation Facility was built to be Earthquake-proof to protect the precious control center inside.

(Top: The Mission Control Center, where you can watch the DSN dishes communicating with spacecraft all over the solar system and beyond. Bottom: There is a superstition at JPL that peanuts must be passed around to ensure that launches and landings are successful, dating back to the 1960s. The lucky peanuts were eaten for Curiosity and Perseverance’s landings, among many others)

From my first day, the other interns who I met were incredibly kind and open. The JPL researchers and staff were all supportive and encouraging. I was lucky to experience only friendly and inviting people. The interns I met came to JPL from all over the world – Singapore, Australia, Italy, and Iceland, to name only a few – and were all open to having the most fulfilling experience at JPL, and in Southern California, as possible. I felt satisfied with not only the work I was doing at JPL, but also felt enriched by the experiences and memories I was making with my fellow colleagues.

Top: A hike up Echo Mountain trail which begins just north of Pasadena. This hike was organized by the Australian interns who had heard there was snow at the top of the hike. By the time we got there, one singular patch of snow about 0.25 square meters in size remained. They still made a few snowballs out of it to throw. Bottom: The view of the sunset from Joshua Tree National. My first time in the desert! We spent two nights camping in Joshua Tree, filling the days with hiking and rock-climbing (which I observed from the ground….).

The month of May came quicker than I could’ve imagined, and soon I was flying back to Toronto to continue my PhD back at York. While it was great to be back seeing my family, friends, and pets, my experience at JPL is one I will cherish forever. I feel incredibly grateful to have spent four months at such an amazing place, working with people who have such a hunger to explore what is out there in the universe. I will take the lessons I learned there with me through the rest of my degree – and hey, maybe in 2.5-years’ time when I’ve graduated with my PhD, JPL will have not seen the last of me (wink, wink, someone hire me!!).