COSMOKNOWLEDGEJoin our newsletter

TWO YOUTUBE CHANNELS

Our latest videos

Watch videos from both channels, or explore one of our free simulations.

Explore our free simulations ↓

INTERACTIVE SCIENCE

Free simulations

Explore Earth, gravity, planetary motion and impact physics.

All simulations ↗

FEATURED SIMULATION

Spacetime explorer

Explore the solar system in a 3D grid. Select a planet, move around it and adjust the orbit speed.

Open Spacetime Explorer ↗
THE SOLAR SYSTEM

Sun-centered view. Drag to rotate.

1× · 30 days per second

Drag to rotate. Tap a planet to follow it. Use + and − to zoom. On phones, drag sideways; swipe up or down to scroll the page.

The grid illustrates gravity. Planet sizes, distances and bending are exaggerated for visibility.

THE COSMIC DISPATCH / EVERY SUNDAY

Join our newsletter

Our latest video, a popular Short, a discovery, a science fact and a simulation to explore. Free, every Sunday.

THE DAILY BRIEFING /

Daily news

Read all the news ↗

Science news with source links. Previous editions are available in the news archive.

FROM BOTH CHANNELS

Short videos

More Shorts ↗

COSMOKNOWLEDGE MERCH

T-shirts, hoodies
and art prints

Original designs from Cosmoknowledge. Purchases help fund our videos and simulations.

Shop the collection ↗

Made to order. Shipping and taxes calculated at checkout.

YOUTUBE MEMBERSHIP

Support Cosmoknowledge

Membership helps fund our free videos and simulations. Type 1 includes early access and channel perks. Type 2 also includes full researcher interviews.

Become a member ↗

Type 1 Civilization: $3.99/moType 2 Civilization: $7.99/mo

USD. YouTube shows local pricing before joining. Full interviews require Type 2.

ABOUT COSMOKNOWLEDGE

Our channels
and community

We explain space and science through videos, animation and interactive simulations.

About us ↗

Watch on YouTube ↗

Playing loads YouTube. Its privacy policy applies.