Visit to the National Observatory of Athens

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 solar system

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 seasons

The video introduces the Earth’s axis of rotation. It shows how light from the Sun reaches some areas on Earth more than others.

Solar System

The video explains the composition of the Solar System and its planets.

Is there oxygen on Mars?

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.