Astronomers have made the exciting discovery of an Earth-mass exoplanet in the habitable zone of our nearest neighbouring star, Proxima Centauri, a red dwarf star 4.25 light years (1.3 parsec) from the Sun. The new-found world, designated Proxima b, is a little more massive than the Earth, implying that it Read more…
At the end of part one of this article we left our galactic explorers uncovering the first hints of the existence of spiral structure within our Milky Way. In part two we see how the new field of radio astronomy opened up the Galaxy for viewing to our explorers. Read more…
Our galaxy, the Milky Way, is just one of an enormous number of galaxies spread throughout a vast Universe, which is expanding.Everyone knows these facts now, but how do we actually know about our place in the Universe? Light travels through space as a wave, and hence light has Read more…