Why is the Earth spherical?
The video explains why the Earth is round.
The video is a short virtual tour of the National Observatory of Athens. The viewer can see the meridian transit telescope, a replica of the Antikythera mechanism (the world’s oldest computer) and the Doridis telescope.
The video explains the solar system to children.
In the video, a model of the solar system is created, and the various planets and their order in relation to the Sun are learned.
The video introduces the Earth’s axis of rotation. It shows how light from the Sun reaches some areas on Earth more than others.
This video explains the story of two scientific discoveries: the discovery of Neptune and the prediction of black holes.
The NASA engineer Asad Aboobaker explains that there is Oxygen on Mars and that a new technology called “MOXIE” has proven that we could convert Martian CO2 into oxygen for use by future explorers.