More Learning Material

Hand-picked free tools, videos, and books we actually use ourselves.

NASA Astronomy Picture of the Day

NASA · Daily

A new image of our universe each day with a short explanation by a professional astronomer. Running since 1995.

NASA on YouTube

NASA · YouTube

Live rocket launches, ISS feeds, and full mission documentaries — straight from the agency. The single best free space channel online.

ESA / Hubble

ESA · Web

The European Space Agency's Hubble portal — three decades of images, papers, and explainers from humanity's most famous telescope.

James Webb Space Telescope

NASA · ESA · CSA

The official JWST gallery from STScI. Infrared views of galaxies, nebulae, and exoplanet atmospheres in resolutions Hubble never reached.

SpaceX

SpaceX · Live

Live launch webcasts, Starship test flights, and Starlink deployments. The most-watched rocket coverage on the internet — free, no signup.

Stellarium Web

Stellarium · Interactive

A free planetarium in your browser. Set your location and see exactly what the sky looks like right now — or any date in history.

Heavens-Above

Satellites · Free

Precise pass predictions for the ISS and bright satellites over your location. Know exactly when to look up and where.

NASA Eyes on the Solar System

NASA · Interactive

Fly through a real-time 3D model of our solar system built on actual NASA mission data. Track every planet, moon, and active spacecraft.

Learn Astronomy — Interactive Guides, Quizzes & Field Guide