Astronomy Club members learned a range of techniques for finding exoplanets and experimented with these methods through Google Colab’s online Python development environment during a workshop held during lunch on Nov. 10.
Director of Internal Affairs Elizabeth Zhang (11) described detection methods ranging from the transit method, which involves looking for periodic dips in star brightness caused by obscuring exoplanets, to astrometry, which requires directly measuring a celestial body’s position and velocity over time. She laid out the advantages and disadvantages of each approach and explained that open source software for analyzing publicly available astronomical data has made exoplanet research very approachable.
“Normally when people do astronomy, they think of needing to act as a telescope or needing to go outside when it’s really dark and look at the sky,” Elizabeth said. “In fact, astronomy can be much closer to Harker life. It can just be you coding on your computer. I wanted to make it clear that you can still do astronomy without having resources like expensive telescopes.”
Using a Google Colab notebook to manipulate data from NASA’s exoplanet archive, attendees looked into the properties of exoplanets utilizing the transit method. Astronomy Club Committee Member Lucas Wu (10) pointed out the workshop portion of the lecture as his favorite part.
“When a planet passes in front of a star in front of our vision, then light flux is going to decrease, because it’s blocking some of the light,” Lucas said. “So then you look at how often the light flux is going down and coming back up. [Through the activity], you actually got to explore an exoplanet, and it made you feel like you made a cool scientific discovery.”

Exoplanet research is a growing field of study. Astronomy Club President Eric Dong (12) explained that studying exoplanets allows scientists to learn more about the possibility of life beyond Earth.
“Exoplanets are worth studying, not just because they’re inherently interesting, but because they have the potential to harbor life,” Eric said. “Learning about life beyond the solar system gives us a better idea of how life develops and how we should be approaching space exploration.”
Elizabeth added that the relative ease of exoplanet detection reflects the growing accessibility of science research due to the increased availability of information online.
“I hope the attendees learned that as long as you put your mind to some project, you can get it done,” Elizabeth said. “The internet is such a big space, and there is so much out there for you to learn that if you were to really just sit down and try to make something happen, like find an exoplanet, it is doable for a high schooler. Anything’s possible.”





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