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Exoplanet Detective for a heartbeat

Simulate a heartbeat live in your browser. This runs the real Exoplanet Detective solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.

For:StudentsResearchersEducatorsEngineersHobbyists & MakersK-12 StudentsFirst Responders
1

Exoplanet Transit

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Exoplanet TransitLive

Controls

Presets

As a planet crosses its star, it blocks a tiny fraction of the light — a dip of depth (Rp/Rs)². This is how Kepler and TESS have found thousands of exoplanets. Impact parameter sets how centrally the planet crosses, changing the transit shape and duration. Drag the planet across the star to set its phase, or up and down to set the impact parameter — the light curve updates live.

▶ Run in Python

Data Inspector

Transit depth1.00%
Rp/Rs0.10
Impact b0.20

Governing equation

Reading this result: The dip depth is almost exactly (Rp/Rs)², so measuring how much light is blocked directly gives the planet's size relative to its star. The width of the dip is the transit duration, which — combined with how often it repeats — follows from the planet's orbital period and speed across the disk.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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2

H-R Diagram

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Hertzsprung-Russell DiagramLive

Controls

Presets

The H-R diagram plots stars by temperature and luminosity, revealing the main sequence (a diagonal band), red giants, supergiants, and white dwarfs. Your star (pink ring) sits on the main sequence where luminosity scales as T⁴.

▶ Run in Python

Data Inspector

Spectral classG
Luminosity1.00 L☉
Temperature5,778 K

Governing equation

Reading this result: A cool orange K-type star: lower temperature places it low-right on the main sequence, dimmer and longer-lived than the Sun.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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About this simulation

The full Exoplanet Detective tool models a heartbeat with the same numerics engineers and scientists use — running entirely client-side. Change any parameter and the result updates in real time, so you can build intuition, check a design, or teach the concept without spreadsheets or installs.

More you can do with Exoplanet Detective

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Other ways to simulate a heartbeat

Dynamical Systems for a heartbeatEpidemic Network for a heartbeatSpatial Predator–Prey for a heartbeatSIR Epidemic for a heartbeatHodgkin-Huxley Neuron for a heartbeatLotka-Volterra for a heartbeat

Frequently asked questions

How do I simulate a heartbeat?
Open this page and use the live Exoplanet Detective tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.
Is it free?
Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.
Can I use my own numbers?
Absolutely — every input is adjustable, and with data import you can drive a heartbeat from your own measurements.