Dark Matter

Category archives for Dark Matter

“Dark matter is interesting. Basically, the Universe is heavier than it should be. There’s whole swathes of stuff we can’t account for.” -Talulah Riley One of the most puzzling facts about the Universe is that 95% of the energy in it, in the forms of dark matter and dark energy, are completely invisible, and have…

“There are stars leaving the Milky Way, and immense gas clouds falling into it. There are turbulent plasmas writhing with X- and gamma-rays and mighty stellar explosions. There are, perhaps, places which are outside our universe. The universe is vast and awesome, and for the first time we are becoming a part of it.” -Carl…

“Hubble often takes images of distant gravitationally lensed galaxies to infer their substructure and to try to learn about early galaxies in general. For LUVOIR, we would have that same resolution for any galaxy! That’s truly revolutionary.” -John O’Meara If you were an observational astronomer, what would your dream telescope look like? It would have…

“Space and time may have a structure as intricate as the fauna of a rich ecosystem, but on a scale far larger than the horizon of our observations.” -Martin Rees On the largest scales, dark matter has been undoubtedly the most successful theory in modern cosmology for explaining a huge variety of observations. From the…

“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 Hubble When you look out at the distant Universe, you…

“Two recent studies by teams in the U.S. and the Netherlands have shown that the gamma-ray excess at the galactic center is speckled, not smooth as we would expect for a dark matter signal. Those results suggest the speckles may be due to point sources that we can’t see as individual sources…” -Eric Charles When…

“Dark matter or invisible element? You decide.” -Toba Beta The dark matter wars rage on and on, with both sides — those in favor of modifying gravity and those in favor of adding an additional mass component to the Universe — claiming victories for their own side and defeat for the other. But one piece…

“In our description of nature the purpose is not to disclose the real essence of the phenomena but only to track down, as far as possible, relations between the manifold aspects of our experience.” -Niels Bohr When it comes to galaxies, clusters of galaxies or the largest-scales on the Universe, dark matter is absolutely required.…

“For me the best answer is not in words but in measurements.” -Elena Aprile Dark matter is perhaps the most mysterious substance in the Universe. It outmasses normal matter and radiation, which includes all the known particles in the Standard Model, by a factor of 5-to-1. The observational, astrophysical evidence for its existence is overwhelming,…

“You may hate gravity, but gravity doesn’t care.” –Clayton Christensen If all we had were galactic rotation curves — like those measured by Vera Rubin — we would know that something was wrong with our picture of the Universe, but we wouldn’t know how. Two equally good explanations, that there was either a flaw in…