Initializing, please wait a moment

How to explore Sunspot Activity 3D Explorer

Open the Sunspot Activity 3D Explorer, read the ~11 yr / ~25 d / ~35 d / Maunder 1645-1715 figures, and scrub the cycle year slider while watching spot counts change.

  1. Open https://freetoolonline.com/space-3d/sunspot-cycle.html and wait for the photosphere, latitude belts, and spot groups.
  2. Read the facts panel: Schwabe ~11 yr, equator ~25 d, poles ~35 d, Maunder 1645-1715.
  3. Scrub cycle year from 0 toward 5-6 to see more umbra/penumbra spots at maximum.
  4. Press Play cycle, then Pause cycle, to auto-advance one Schwabe period.
  5. Toggle Maunder Minimum to compare a nearly spot-free era (1645-1715).
Follow four steps: open the Sunspot Cycle explorer, read the facts panel, scrub cycle year toward maximum, then press Play cycle and Pause cycle.
Open explorer, read facts, scrub year, press Play and Pause.

Next: the when guide or vs alternatives. Open the Sunspot Activity 3D Explorer.

Reviewed by the Free Tool Online editorial team · Tested in the current versions of Chrome, Firefox, Safari, and Edge before publishing. No account is needed to use any tool. Report a bug - we triage within 72 hours. · Last refreshed April 2026.

Why trust these tools

  • Ten-plus years of web tooling. The freetoolonline editorial team has shipped browser-based utilities since 2015. The goal has never changed: get you to a working output fast, without an install.
  • No install, no sign-up. Open a tool and get a working output in seconds - nothing to download and no account to create. Tools that need heavy processing run it on our service, so even a low-powered machine gets the job done.
  • Analytics stops at the page view. We measure which pages get visited, not what you type or upload inside a tool. There is nothing to sign in to and no profile is attached to your input.
  • Open-source core components. The processing engines underneath (libheif, libde265, pdf-lib, terser, clean-css, ffmpeg.wasm, and others) are public and audit-able. We link to each one in its tool page's footer.
  • Free, with or without ads. All tools are fully functional without sign-up. The Disable Ads button in the header is always available if you need a distraction-free run.

Related tools:

  • Solar System 3D Explorer - Solar System 3D Explorer - All eight planets orbit the sun live on screen - drag to orbit the view,
  • Galaxy 3D Simulator - Galaxy 3D Simulator - Up to 100,000 points form the spiral arms on desktop (30,000 on phones so
  • Velociraptor 3D Viewer - View a Velociraptor in 3D at its true, turkey-sized scale - rotate the model, size it against a
  • Triceratops 3D Viewer - View a Triceratops in 3D - rotate its frilled skull and three horns, size the model against a
  • Giganotosaurus 3D Viewer - View Giganotosaurus in 3D - rotate the model, size it against a person, and read its real length,
  • Apatosaurus 3D Viewer - View Apatosaurus in 3D - rotate the stocky sauropod, size it against a person, and read its real
  • Moon Phases 3D Explorer - Moon Phases 3D Explorer - Scrub through a synodic month and watch the Sun-Earth-Moon geometry set
  • Saturn Rings 3D Explorer - Saturn Rings 3D Explorer - Explore Saturn's main C, B, and A rings and the Cassini Division in 3D
  • Kepler Orbits 3D Explorer - Kepler Orbits 3D Explorer - Explore Kepler's three laws with an elliptical orbit in 3D -
  • Moon Calendar 3D Explorer - Moon Calendar 3D Explorer - Scrub a synodic month on a calendar-style Moon view with earthshine on
  • ISS Orbit Tracker 3D Explorer - ISS Orbit Tracker 3D Explorer - Watch a procedural ISS low-Earth orbit around Earth with a yellow
  • Lunar Eclipse 3D Explorer - Lunar Eclipse 3D Explorer - Scrub a lunar eclipse as the full Moon passes through Earth's penumbra

Related guides: