Posted by In the summer of 2020, an undergraduate named Shane Smith was working through radio data from the Parkes telescope in Australia as part of the Breakthrough Listen internship program at Berkeley. He found a narrow signal that seemed to come from the direction of Proxima Centauri, the nearest star to the Sun. It was catalogued as BLC1 and, for a while, was the most interesting candidate the project had ever seen. A careful follow-up analysis eventually showed it was almost certainly human-made interference. Nobody counts that as a failure. It is a good illustration of what astronomy internships for undergraduates can actually involve: real data, real stakes, and the slow discipline of proving yourself wrong.
What an internship actually looks like
The word covers a lot of ground. Most undergraduate research placements in astronomy run for eight to ten weeks over the summer, full time, with a stipend and often housing. Others happen during term, a few hours a week, with a professor in your own department. The work could be fitting light curves of variable stars, writing code to clean up telescope images, modelling the orbit of a planet, testing a receiver in a lab, or running simulations on a cluster.
You will rarely be handed a neat problem with a known answer. That is the point. Classes teach you how to solve equations; research teaches you what to do when the data are noisy, half the files are missing, and the question itself turns out to be the wrong one. Most interns spend their first two weeks feeling lost. That is normal.
Where the programs are
In the United States the best-known route into astronomy internships for undergraduates is the National Science Foundation’s Research Experiences for Undergraduates program, usually shortened to REU. Universities and observatories host REU sites in astronomy and physics, each taking a small group of students for the summer. Eligibility for NSF-funded places is generally limited to US citizens and permanent residents, which catches some international students by surprise, so read the fine print.
The National Radio Astronomy Observatory runs summer student programs at its sites, including Green Bank in West Virginia, home of the giant steerable dish where Frank Drake ran Project Ozma in 1960. NASA offers internships across its centres. The SETI Institute in California has hosted summer undergraduates working on astrobiology and technosignature projects. Berkeley’s Breakthrough Listen team takes interns most years. Outside the US, many universities and research institutes in Europe, Australia and elsewhere run their own summer schemes, often advertised only on departmental websites.
Community-maintained lists, such as the one on the AstroBetter wiki and the American Astronomical Society’s job register, gather a lot of these in one place. They are a better starting point than general job sites.
And do not overlook your own building. A large fraction of first research experiences start with a student emailing a professor down the corridor.
The skills that get you picked
Physics and maths matter, obviously. But if there is one practical skill that changes your chances, it is programming, and in astronomy that mostly means Python. Libraries like Astropy, NumPy and Matplotlib are what working astronomers use every day. You do not need to be a software engineer. You need to be able to load a data file, plot it, and fit a model without being walked through every line.
Statistics is the quiet second. Astronomers live with uncertainty, small samples and selection effects, and a student who understands why a three-sigma result is not proof will stand out. A little knowledge of how telescopes and detectors work helps too, especially for observing or instrument projects.
What you can skip worrying about: having everything. Programs know undergraduates are learners. They are mostly looking for curiosity, persistence and evidence that you can teach yourself things.
Getting closer to SETI
There is no internship labelled “SETI” that guarantees a career in it, and very few people in the field started out on a straight line. The search for technosignatures borrows from radio astronomy, signal processing, exoplanet science, machine learning and planetary science. Any of those is a reasonable entry point.
Radio astronomy is the most direct. A summer spent learning how dishes are calibrated, and how astronomers separate real cosmic sources from satellites, radar and mobile phones, is exactly the training that BLC1 demanded. Interference is the everyday enemy of SETI, and also of ordinary radio science. Jocelyn Bell Burnell, then a graduate student at Cambridge, noticed a bit of “scruff” on her chart recordings in 1967 that turned out to be the first pulsar. The skill was the same one: telling an odd signal from a broken instrument.
Exoplanet projects build a different but related intuition. Students who have worked with Kepler or TESS light curves know how hard it is to pull a planet out of a star’s flickering, and why claims about distant atmospheres need caution. Astrobiology placements can come from chemistry, geology or microbiology departments as easily as from physics. A student studying microbes in hot springs or analogue sites for ancient Mars is doing work that feeds directly into the search for life.
Machine learning is now everywhere in large surveys. It is useful for spotting anomalies in huge datasets, which is precisely what technosignature searches need. The catch is that an algorithm flags oddities; it does not tell you what they mean. Interns who understand the instrument behind the data are far more valuable than those who only know the model.
Applying without a track record
Most summer programs open applications in the autumn or winter and close somewhere between December and February, months before the work starts. Keep a spreadsheet of deadlines and requirements. You will typically need a CV, a transcript, a personal or research statement, and two or three recommendation letters. Ask your referees early and send them a short note about each program and why you are applying, so their letters can say something specific.
The statement is where many applications fail. A generic paragraph about loving the stars since childhood tells the reader nothing. Name the projects or research groups that interest you, and explain what you have actually done: a coursework project, a Python script that analysed public telescope data, an astronomy club observing campaign. Be concrete about tools and data. “I analysed TESS light curves with Lightkurve to measure a planet’s transit depth” beats “I have data analysis experience” every time.
If you have no research experience at all, you are in the same position as most applicants. That is what these programs are for. Public archives make it possible to do a small independent project before you apply, and citizen-science platforms like Zooniverse have let thousands of volunteers classify galaxies and hunt for planets in real survey data.
What you take home
Some interns publish. Many present a poster at a meeting of the American Astronomical Society or a university symposium. Almost all come away knowing whether they actually like research, which is worth a lot before committing to a PhD. Others discover they love the coding more than the astronomy and head into data science or engineering, carrying skills that transfer well.
The field is small enough that the people you meet in one summer will turn up again in graduate admissions, conferences and collaborations. For astronomy internships for undergraduates, that network may be the most lasting benefit.
If you are working out your own route into astronomy or SETI, SETIworld covers the research, the instruments and the people behind them, and the portal is a good place to keep reading and to compare notes with others on the same path.
