Gravity

Category archives for Gravity

“To disagree leads to study, to study leads to understanding, to understand is to appreciate, to appreciate is to love. So maybe I’ll end up loving your theory.” -John Wheeler Out there in the Universe, there’s a lot to marvel at. Over billions of years, gravity has attracted different portions of the expanding Universe together…

Cosmic Awe

“…the magnificence of the Universe as revealed by modern science might be able to draw forth reserves of reverence and awe hardly tapped by the conventional faiths.” -Carl Sagan As many of you know, I’m fortunate enough to live in a city that values science and scientific knowledge so highly that the our local news…

“God put me on this earth to accomplish a certain number of things. Right now I am so far behind that I will never die.” -Bill Watterson Welcome back to another Messier Monday, only here on Starts With A Bang! With each new Monday, we take an in-depth look at a prominently visible random object from Messier’s catalogue…

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…

“Anyone who has never made a mistake has never tried anything new.” -Albert Einstein Back when Einstein first proposed his theory of General Relativity, his revolutionary picture of the Universe was met with a mix of curiosity, awe, and intense skepticism. It isn’t every day that your most cherished of all physical theories — the…

“As seismologists gained more experience from earthquake records, it became obvious that the problem could not be reduced to a single peak acceleration. In fact, a full frequency of vibrations occurs.” -Charles Francis Richter You’ve all been around long enough to be familiar with the severe damage that earthquakes can cause, rattling and cracking the…

Putting Einstein to the Test

“The views of space and time which I wish to lay before you have sprung from the soil of experimental physics, and therein lies their strength. They are radical. Henceforth space by itself, and time by itself, are doomed to fade away into mere shadows, and only a kind of union of the two will…

“Despite its name, the big bang theory is not really a theory of a bang at all. It is really only a theory of the aftermath of a bang.” -Alan Guth So you finally understand it. The Big Bang tells us that the Universe was hotter, denser, and expanding at a faster rate in the…

What Matters about Dark Matter?

“A cosmic mystery of immense proportions, once seemingly on the verge of solution, has deepened and left astronomers and astrophysicists more baffled than ever. The crux… is that the vast majority of the mass of the universe seems to be missing.” -William J. Broad Three classic observations — the Hubble expansion of the Universe, the…

How Big is Our Observable Universe?

“The mind, once expanded to the dimensions of larger ideas, never returns to its original size.” -Oliver Wendell Holmes When General Relativity supplanted Newton’s work as our theory of how gravity works in the Universe, it didn’t just change how we view how masses attract, it gave us a new understanding of what the questions where…