Veritasium is a channel of science and engineering videos featuring experiments, expert interviews, cool demos, and discussions with the public about everything science.
Eyes on the Solar System is an online, interactive 3-dimensional model of the major bodies in our solar system, together with current NASA spacecraft orbits and positions.
The Turtle System is a free educational program developed at the University of Oxford, designed to bridge the “Post-Scratch Gap” between visual programming systems like Scratch and text-based programming.
Kurzgesagt is a YouTube channel that publishes educational videos every week. They cover a range of topics, from astronomy to physics, biology, art, and much more.