◆ Astronomy

What a cosmologist
really does.

20 tasks, each one witnessed by the sources that watched the job — and behind every one, a prompt you can use tonight.

20evidenced tasks
2,120in the US (2025)
$128,820median pay / year
7systems it runs on
See the 20 tasks ↓Open in the atlasThe full career map →
This is what one task looks like here
Teach astronomy or astrophysics.
Draft a semester course plan on cosmology covering the Friedmann equat…4 sources agree

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The work, task by task

20 tasks
Grow the practice9
Present research at conferences+
Present my latest cosmic background and dark-matter constraints at the Royal Astronomical Conference next Thursday: prepare a 12‑minute talk with clear plots, one slide for methodology, one slide for results, a slide of uncertainties, and a one‑page handout for chairs.
jdonet2 agree
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Perform theoretical research+
Work through the derivation of the perturbation equations for scalar modes in a flat ΛCDM background, test assumptions about initial conditions, and produce a one‑page note with equations, key approximations, and next analytic steps by Thursday noon.
jd
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Develop software to interpret satellite data+
Design and write the processing module that ingests the satellite's calibrated detector timelines, removes known systematics, fits the instrument response, and outputs time‑ordered data and a QA report so the pipeline can produce maps next week.
jd
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Publish research articles+
Draft the methods and results sections for the cluster lensing paper: include lens model equations, data selection, error budget table, and two figures, circulate a complete draft to Maria and James for comments by Monday midday.
jd
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Analyze research data to determine its significance, using computers.+
Assess the latest survey and telescope output, run the statistical tests that quantify detection significance, produce a short methods-and-results note with figures, and flag any anomalies needing re-observation by Monday.
onet
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Raise funds for scientific research.+
Draft a concise two-page proposal summarising the scientific case, preliminary results, required budget and timeline, attach key figures and a one-page CV, and send to the university research office and two potential funders by next Friday.
onet
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Serve on professional panels and committees.+
Prepare my committee report: list conflicts of interest, summarise recent topical developments, state recommended actions and time commitments, and circulate to panel members with requested responses within two weeks.
onet
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Research the formation, structures, properties, and development of interstellar matter+
Perform a literature and catalogue cross-match for the molecular cloud region, compile spectral line and dust continuum measurements, model density and temperature profiles to test fragmentation scenarios, and draft a one‑page summary of implications for star formation.
esco
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed. Helpful?
Hands on the work6
Watch and assess4
Work with people1

What the work runs on

named inside the evidenced tasks
9 tasksPythondefine data processing and statistical testing workflows and prototype analysis scripts for the proposal
8 tasksMicrosoft Wordcreate a structured course document with embedded equations, schedules, and assessment detailsOpen its task library →
3 tasksLinuxcontrol remote instruments, run acquisition scripts, and transfer large raw datasets to archive
2 tasksMicrosoft PowerPointassemble slides, embed plots and speaker notes for a timed talk
2 tasksC++implement high-performance numerical solvers for hydrodynamics and run intensive cluster merger simulations
2 tasksMicrosoft Excelorganise schedules, rosters, and maintenance logs in tables that recalculate and can be sharedOpen its task library →
1 taskStructured query language SQLdescribe the queries I will run to validate the delivered tables
Browse every evidenced software task →

The same task, four heights

this page is height one
ExecuteDo today's task, with fewer mistakesyou are here → ImproveMake it easy for the next person to acceptin the atlas → DecideWork out the right move when it is unclearin the atlas → BecomeLearn the pattern so it stops coming backin the atlas →

Can AI actually do this job?

the honest answer

It can

where it genuinely helps
  • Explain the theory behind the work
  • Draft, tidy and structure your writing
  • Rehearse a hard conversation before you have it
  • Build a study plan that fits your gaps

It cannot

where it stops, completely
  • Be in the room where a cosmologist actually works
  • Carry the responsibility when the call is wrong — that weight stays yours
  • Notice what no one wrote down: the hesitation, the thing left unsaid
  • Live with the outcome
M · R6 of R7This job sits on stargazing — real theory, real diagnosis, but reality still holds the grading pen.

What the work pays

two countries, two different measures

United States

this exact occupation · BLS 2025
  • $128,820 a year — the middle: half earn more, half earn less
  • The lowest tenth earn near $78,010; the top tenth near $195,190
  • 2,120 people employed in this occupation

India

the occupation GROUP, not this job · PLFS via ILOSTAT 2025
  • ₹38,298 a month — the median for Professionals, the group this work sits in
  • India publishes pay by broad occupation group, so this covers many jobs besides this one. It is a shape, not a salary.
read this carefullyThese two numbers are not comparable and must not be converted into each other. One is a yearly figure for this job alone; the other is a monthly figure for a whole family of jobs. What travels between them is the pattern, not the amount: experience lifts pay almost everywhere.

Where the evidence lives

open any of it yourself
O*NETThe US Department of Labor's own record of this job8 of these tasks ESCOThe European skills and occupations register5 of these tasks Job descriptionsReal postings, in the wild9 of these tasks WikipediaHow the world describes this work4 of these tasks US Bureau of Labor StatisticsPay and employment, by occupation2025 figures

Close to this work

12 nearby
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Questions people actually ask

You split time between desk work and collaboration. Mornings often mean coding in Python or C++ to run simulations or process telescope data on Linux machines.

Afternoons can be meetings with engineers or data analysts, mentoring students, writing or editing a paper in Microsoft Word, and preparing a talk in PowerPoint for a conference or public lecture.

Expect to use Python and C++ heavily for modeling and data analysis, running scripts on Linux servers. SQL is common for querying large survey databases.

You’ll also use Microsoft Excel for quick data checks, Word for papers and proposals, and PowerPoint for conference or public presentations.

According to the U.S. Bureau of Labor Statistics (BLS), there were about 2,120 employed cosmologists in 2025 with a median wage of $128,820 per year.

The lowest tenth earned about $78,010 and the top tenth about $195,190. Pay varies by employer: universities, observatories, national labs, or industry.

Start with a bachelor's in physics, astronomy, or a closely related field. Learn calculus, differential equations, and basic programming (Python is best).

Then apply to graduate (PhD) programs in astrophysics or cosmology. Research experience at an observatory or on a faculty project and skills in data analysis and modeling matter a lot.

Cosmology focuses on the universe’s large-scale structure, origin, and evolution—things like the Big Bang, dark matter, and dark energy.

Astrophysics covers objects (stars, planets, galaxies) at any scale; observational astronomers specialize in collecting photons or gravitational waves. Cosmologists may do theory, observation, or both.

Yes. AI/ML tools are useful for pattern finding in large surveys, classifying objects, or speeding up simulations. Use Python libraries and validate models on held-out data.

Always cross-check ML outputs with physical models, perform uncertainty estimates, and document training data—especially before publishing or using results from satellite data or observatories.

Communication: you’ll explain results to engineers, funding panels, students, and the public (PowerPoint and plain language matter).

Practical data skills: cleaning big datasets, using Linux clusters, writing maintainable Python/C++ code, and basic SQL for databases. Grant writing and teamwork on long projects are also crucial.

km/h RPM

How far can AI take you?

one question
Be honest — how far can a language model take you on stargazing?
There is a real answer, and it is not the flattering one.