LyrArc Article Gist
Light in our galaxy The Milky Way travels at a speed of 300,000 kilometres a second so that light from the moon reaches us in less than 2 seconds. There are other distances we cannot even comprehend such as it taking thousands years for light to travel from distant stars in the Milky Way to earth. And even these distant stars have contributed to life on earth say scientists.

During this strange pandemic where virus can mutate and can infect 18 million in the U.S. alone and about which so little is known, this idea of the planets and stars and time puts everything in perspective. Here DW.com talks to a British astronomer who studied at University College, London and Imperial College. Giles Sparrow is the author of "The History of the Universe in 21 Stars." Giles Sparrow tells us there are 200 billion stars, think of that for a moment! 

Sparrow says 61 Cygni is an obscure star in the constellation of a swan. Astronomers with today's telescopes, itself something recent, have figured out the distance. Why are stars not shifting their positions as the earth moves around the sun? The reason is that stars are so far away we can only imagine these distances, or maybe not even able to imagine.