redshift

Tag archives for redshift

“We find them smaller and fainter, in constantly increasing numbers, and we know that we are reaching into space, farther and farther, until, with the faintest nebulae that can be detected with the greatest telescopes, we arrive at the frontier of the known universe.” -Edwin Powell Hubble With 110 deep-sky objects scattered throughout the heavens,…

“Pinwheel, pinwheel spinning around. Look at my Pinwheel and see what I found. Pinwheel, pinwheel, breezy and bright. Spin me good morning, spin me good night.” -Janet Gardner It’s time for another Messier Monday, where each week, one of the 110 deep-sky objects that make up the famed Messier Catalogue — the first large, accurate catalogue of non-cometary…

What is dark energy?

“Because dark energy makes up about 70 percent of the content of the universe, it dominates over the matter content. That means dark energy will govern expansion and, ultimately, determine the fate of the universe.” -Eric Linder It’s been a while since we’ve spoken about dark energy, and we were just talking about Einstein’s greatest…

“Great spirits have always encountered violent opposition from mediocre minds.” -Albert Einstein It may be hard to believe, seeing as how it’s been our leading theory of gravity for nearly a century now, but Einstein’s General Relativity is possibly the most frequently challenged scientific idea of all-time. Of course, it’s emerged victorious from each and…

“It took less than an hour to make the atoms, a few hundred million years to make the stars and planets, but five billion years to make man!” -George Gamow Earlier today, a video (from last month) was released where one of the members of the US House of Representative — a member who sits…

Another Trip Around the Sun

“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…

This is an enhanced version (with some upgraded images and text) of an article I first wrote over two years ago. It is just as valid today as it was back then, only today, I have a special offer to go with it. Next week, a bunch of cosmologists and myself are getting together and…

Say Goodbye to Virgo…

Aaah, the Virgo cluster. A huge cluster of hundreds of galaxies, and our closest large neighbor in the Universe. People have known for a long time that although Virgo is still redshifting away from us, it isn’t quite as fast as we would expect from the Hubble expansion rate of the Universe. Does this mean…

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,…