Galaxies

Category archives for Galaxies

“We detect motion along this axis, but right now our data cannot state as strongly as we’d like whether the clusters are coming or going.” -Alexander Kashlinsky When dark energy was discovered, and the expansion of the Universe was shown to be accelerating, there was concurrently another puzzle that received much less attention: the problem…

“Mozart’s music is like an X-ray of your soul – it shows what is there, and what isn’t.” -Isaac Stern When supermassive black holes have a large amount of matter fall onto them, they accelerate a large amount of the ionized material — particularly electrons — into high-velocity, bi-directional jets. In many cases, those jets…

“The first amazing fact about gravitation is that the ratio of inertial mass to gravitational mass is constant wherever we have checked it. The second amazing thing about gravitation is how weak it is.” -Richard Feynman One of the strangest, most novel predictions of Einstein’s relativity is that mass would not only curve space, but…

“Even when Darwin’s teaching first made its appearance, it became clear at once that its scientific, materialist core, its teaching concerning the evolution of living nature, was antagonistic to the idealism that reigned in biology.” -Trofim Lysenko When it comes to many issues, democracy and popular opinion does and should determine the outcome. But when…

“The slow philosophy is not about doing everything in tortoise mode. It’s less about the speed and more about investing the right amount of time and attention in the problem so you solve it.” –Carl Honore Einstein’s theories of special and general relativity tell us that there’s no Universal, preferred frame of reference. But that…

“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…