Ask Ethan

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“I soon became convinced… that all the theorizing would be empty brain exercise and therefore a waste of time unless one first ascertained what the population of the universe really consists of.” –Fritz Zwicky When we look out at the galaxies in the Universe, watching how they rotate, we find that the starlight we see…

“I just think too many nice things have happened in string theory for it to be all wrong. Humans do not understand it very well, but I just don’t believe there is a big cosmic conspiracy that created this incredible thing that has nothing to do with the real world.” –Edward Witten It’s a difficult…

“[I]f there were no light in the universe and therefore no creatures with eyes, we should never know it was dark. Dark would be without meaning.” –C.S. Lewis The Universe had two periods where light was abundant, separated by the cosmic dark ages. The first came at the moment of the hot Big Bang, as…

“We are told to let our light shine, and if it does, we won’t need to tell anybody it does. Lighthouses don’t fire cannons to call attention to their shining- they just shine.” –Dwight L. Moody When it comes to the farthest thing we can see in the Universe, that’s the Cosmic Microwave Background, or the…

“Never erase your past. It shapes who you are today and will help you to be the person you’ll be tomorrow.” –Ziad K. Abdelnour But even moreso than the fact that we’re shaped by our past, the Universe itself — geometrically — is shaped by its history and composition. You might imagine all sorts of…

“A single tiny light creates a space where darkness cannot exist. The light vanquishes the darkness. Try as it might, the darkness cannot conquer the light.” –Donald L. Hicks While it might seem like there are an endless supply of stars in the Universe, the process that powers each and every one requires fuel to…

“Silently, one by one, in the infinite meadows of heaven, Blossomed the lovely stars, the forget-me-nots of the angels.” –Longfellow The cosmic microwave background is a thing of beauty, as not only does its uniform, cold temperature reveal a hot, dense past that began with the hot Big Bang, but its fluctuations reveal a pattern…

“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 If you want, you can imagine back in the Universe to a time before it looked anything like ours did. Before there…

“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 We’ve come…

“Hope is not the conviction that something will turn out well but the certainty that something makes sense, regardless of how it turns out.” –Vaclav Havel When you take a look at the planets in our Solar System, one of the most striking features about them is that they all orbit in almost exactly the…