Great segment Laura, i love the subject of Astronomy, and have read all the versions of A History of Time, i reckon i could have some major conversions with that scientist (he sounded like he had a slight english accent, was he english?), i have some theories of my own concerning the origins of the universe, but i shall spare you those.
The research of analyzing light is paramount to understanding who we all are by way of Astronomy, light itself will reveal everything to us one day, despite all the beauty we can see, our eyes in their current state are pitifull in the grand scheme of things, therfore we remain reliant on such advances in this field of technology.
Once again, great segment, i learnt some things i did not know before, i am always open to education, as everyone should be. LS;) Maida Vale, London