# Discovering the Universe

- Institution: Gresham College
- Speaker: Professor Chris Lintott
- Year: 2023
- Level: For everyone
- Language: English
- Subjects: Physics, Astronomy and space
- Source: [Gresham College](https://www.gresham.ac.uk/watch-now/series/discover-universe)
- Licence: [Educational use (Gresham College's terms)](https://www.gresham.ac.uk/terms-and-conditions)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

The discovery that we live in an ordinary galaxy, one of several hundred billion in the observable Universe, instigated a profound change in thinking about our place in the Universe. This first lecture covers the Great Debate of the early twentieth century as new telescopes and new ways of observing the cosmos put our Milky Way in its place; and looks at how subsequent observations helped us understand how galaxies like our own formed and evolved.

## Lectures

1. [Island Universes: Discovering Galaxies Beyond the Milky Way](https://invisiblenetwork.ai/learn/gresham/series-discover-universe/71f21a03835c) (YouTube)
2. [The Marvels of the Solar System](https://invisiblenetwork.ai/learn/gresham/series-discover-universe/3dd0daf33e76) (YouTube)
3. ['Oumuamua: Our first interstellar visitor](https://invisiblenetwork.ai/learn/gresham/series-discover-universe/d1c197921be2) (YouTube)
4. [Pulsars, Microwave Ovens and the Radio Sky](https://invisiblenetwork.ai/learn/gresham/series-discover-universe/278b2f2243fa) (YouTube)
5. [Is it Aliens? The Most Unusual Star In The Galaxy](https://invisiblenetwork.ai/learn/gresham/series-discover-universe/794eecd5a325) (YouTube)
6. [First light: Revealing the Early Universe](https://invisiblenetwork.ai/learn/gresham/series-discover-universe/750d16f252a2) (YouTube)