Big Idea: The Earth is a planet orbiting the Sun - one of many stars
in our galaxy, which is one of many galaxies in the Universe. More info...
The universe is expanding; don’t confuse this with the big bang (see episode 705: Cosmology).
Cosmology is the study of the origins, history and future of the universe. The currently favoured model is the big bang.
Recognising and celebrating outstanding contributions to the field of physics education.