Dark Energy

Category archives for Dark Energy

“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…

“If you’re puzzled by what dark energy is, you’re in good company.” -Saul Perlmutter The accelerated expansion of our Universe was one of the biggest surprise discoveries of all-time, and something that still lacks a good physical explanation. While many models of dark energy exist, it remains a completely phenomenological study: everything appears consistent with…

“Until the 1990s, there were few reliable observations about movement at the scale of the entire universe, which is the only scale dark energy effects. So dark energy could not be seen until we could measure things very, very far away.” -Adam Riess Just thirty years ago, scientists argued over the value of the Hubble…

“We’ve known for a long time that the universe is expanding. But about 15 years ago, my colleagues and I discovered that it is expanding faster and faster. That is, the universe is accelerating, and that was not expected, but it is now attributed to this mysterious stuff called dark energy which seems to make…

“If I can’t make it through one door, I’ll go through another door – or I’ll make a door. Something terrific will come no matter how dark the present.” -Rabindranath Tagore Time continues marching on here at Starts With A Bang, just as it does everywhere. My Patreon supporters have stepped up their game, and we’re just…

“It’s everywhere, really. It’s between the galaxies. It is in this room. We believe that everywhere that you have space, empty space, that you cannot avoid having some of this dark energy.” -Adam Riess Back in the 1990s, scientists were quite surprised to find that when they measured the brightness and redshifts of distant supernovae,…

“Even if I stumble on to the absolute truth of any aspect of the universe, I will not realise my luck and instead will spend my life trying to find flaws in this understanding – such is the role of a scientist.” -Brian Schmidt Imagine you had arbitrarily great technology, limitless energy, and the ability…

“The world is the great gymnasium where we come to make ourselves strong.” -Swami Vivekananda But what does it truly mean to be strong? We have four fundamental forces in the Universe: the strong, electromagnetic, weak and gravitational forces. You might think that, by virtue of its name, the strong force is the strongest one.…

“That’s all regular matter, just five percent. A quarter is “dark matter,” which is invisible and detectable only by gravitational pull, and a whopping 70 percent of the universe is made up of “dark energy,” described as a cosmic antigravity, as yet totally unknowable. It’s basically all mystery out there – all of it, with…

“Quintessence is a dynamic, time-evolving, and spatially dependent form of energy with negative pressure sufficient to drive the accelerating expansion […] Whereas the cosmological constant is a very specific form of energy.” -Robert Caldwell, inventor of the Big Rip scenario Our Universe began with a period of cosmic inflation: where energy intrinsic to space itself…