A small site for a very large universe
Explore Universe is a free, open-source website that turns the cosmos into something you can play with. Instead of just reading about planets, you watch them orbit. Instead of a list of galaxies, you filter and search them. Instead of numbers you cannot picture, you slide a control and feel the scale change beneath your fingers.
Everything runs right in the browser. There is no backend, no database and no tracking — just a handful of plain files you can read, fork and make your own.
What's inside
An animated orrery
A canvas engine that draws the Sun and eight planets at true relative orbital speeds, with hover, click and live controls.
A searchable gallery
Fifteen deep-space objects — galaxies, nebulae, clusters, black holes and exoplanets — each with hand-written, factual copy.
A scale explorer
A slider that steps from a single planet up to the observable universe, with real measured sizes alongside the visuals.
A universe timeline
The whole story from the Big Bang to today, told in eleven stops you can scroll through.
Where the facts come from
Figures are rounded, standard values drawn from public science references. For anything precise or up to date, go straight to the primary sources below.
NASA — Solar System Exploration
Planet sizes, distances, temperatures, moon counts and mission data.
NASA / ESA — Hubble & James Webb
Imaging and measurements of galaxies, nebulae and star-forming regions.
NASA Exoplanet Archive
Confirmed exoplanets, their host stars, distances and orbital properties.
Event Horizon Telescope
Imaging of black holes, including the first-ever image of M87*.
Open source, and yours to build on
The whole project is a few plain files. Fork it, add your own planets, swap the data, or ship it to the web as-is. Contributions and corrections are always welcome.