“Some say the world will end in fire, Some say in ice. From what I’ve tasted of desire I hold with those who favor fire. But if it had to perish twice, I think I know enough of hate To say that for destruction ice Is also great And would suffice.” –Robert Frost Depending on … Read moreFor destruction ice is also great and would suffice
“Light thinks it travels faster than anything but it is wrong. No matter how fast light travels, it finds the darkness has always got there first, and is waiting for it.” –Terry Pratchett It’s the end of the week once again, and so let’s have a go at another Ask Ethan! Perhaps inspired by a great … Read moreAsk Ethan #12: How far is the distant Universe?
“The aim of science is not to open the door to infinite wisdom, but to set a limit to infinite error.” –Bertolt Brecht One of the most frequent questions I get about the Universe — as a cosmologist — isn’t quite about the Big Bang in and of itself. The Big Bang is a remarkable … Read moreWhat Happened Before The Big Bang?
“Not even light can escape such hollowing, this huge mass in a small space. Even the Milky Way with its open arms is said to have a black hole at its heart.” -Susan B.A. Somers-Willett Our Milky Way is home to us all. With its hundreds of billions of stars, massive spiral arms, dust lanes, … Read moreIf it comes back to you, it's yours!
“How old would you be if you didn’t know how old you are?” –Satchel Paige Today marks another year and another trip around the Sun for me. For you, and me, and everything on Earth that makes it through another year on this world, there’s a whole lot we get to experience. Some things are … Read moreAnother Trip Around the Sun
“Nothing exists except atoms and empty space; everything else is just opinion.” –Democritus of Abdera When you take a look out at the Universe, past the objects in our own solar system, beyond the stars, dust and nebulae within our own galaxy, and out into the void of intergalactic space, what is it that you see? What … Read moreEmpty space has more energy than everything in the Universe, combined
The Universe isn’t a static place. Although the laws of nature (physics, chemistry, biology, etc.) don’t appear to change over time, everything in the Universe appears to evolve, and changes over time. One of the simplest ways that this happens is through Hubble expansion. General relativity tells us how the Universe expands, and more specifically, … Read moreThe Cosmic Microwave Background? Not always…