The fundamentals of cosmology, dark energy, and other topics by Cambridge University’s Andrei Kaliazin. A little over 20 minutes, it’s somewhat technical, but worth the effort. Watch it here.
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I have enjoyed astronomy since I was a little boy, and wondered what all the little white dots were. My father bought me a 30 dollar reflector when I was about ten years of age. It had a cardboard tube and a rickety wooden tripod. Didn't matter-- I had the Universe at my beck and call!