Galaxies

Category archives for Galaxies

“Men occasionally stumble over the truth, but most of them pick themselves up and hurry off as if nothing ever happened.” -Winston Churchill When we look out at the Universe on the largest scales, from large-scale structure to the fluctuations in the CMB to lensed clusters of galaxies and to giant spirals and ellipticals, we…

“True realism consists in revealing the surprising things which habit keeps covered and prevents us from seeing.” -Jean Cocteau Each time you look at a photograph of the Universe, you aren’t just seeing it as it was at a particular moment in time, but also in a particular wavelength (or set of wavelengths) of light!…

“Our spectroscopic observations reveal the galaxy to be even farther away than we had originally thought, right at the distance limit of what Hubble can observe.” -Gabriel Bremmer One of the holy grails of cosmology is to measure, directly, exactly when the first stars and galaxies formed in our Universe. The Hubble Space Telescope has…

“The wonder is, not that the field of stars of so vast, but that man has measured it.” -Anatole France If you could gather 250 million times as much light as your eye, and improve your resolution by several orders of magnitude, you just might be able to see what the Hubble Space Telescope can.…

“We are stardust, we are golden, We are billion year old carbon, And we got to get ourselves back to the garden.” –Crosby, Stills, Nash & Young When Charles Messier first began cataloguing nebulae, even globular clusters, just a few tens of thousands of light years distant, weren’t resolvable into individual stars. But thanks to the…

“Think about it this way – a boomerang goes out and comes back to you if you throw it. If you throw it out at the universe, it will come back down to you on Earth.” -J. B. Smoove Give a planet a kick, and it goes into a more distant orbit around our star.…

“If you take a galaxy and try to make it bigger, it becomes a cluster of galaxies, not a galaxy. If you try to make it smaller than that, it seems to blow itself apart.” -Jeremiah P. Ostriker 13.8 billion years ago, the Universe as we know it was born with no stars, no clusters…

“Gamow was fantastic in his ideas. He was right, he was wrong. More often wrong than right. Always interesting; … and when his idea was not wrong it was not only right, it was new.” -Edward Teller Considering what we know about our Universe today, it’s hard to believe that just a century ago, Einstein’s…

“I know there is strength in the differences between us. I know there is comfort where we overlap.” -Ani DiFranco The observable Universe is a big, big place. Some 46 billion light years in all directions, with hundreds of billions of galaxies inside, it’s no wonder that we see stars and galaxies in all directions…

“If the expansion of the space of the universe is uniform in all directions, an observer located in anyone of the galaxies will see all other galaxies running away from him at velocities proportional to their distances from the observer.” -George Gamow When Einstein put forth his space-and-time changing theory of General Relativity, one of…