Galaxies

Category archives for Galaxies

“Mapping out the elements in a star is like reading its DNA. We’re using those DNA readings to decode the history of the Milky Way from the stars that we can observe today.” -Steven Majewski Most of the stars in our Milky Way have long lives ahead of them, with dozens or even hundreds of…

“These galaxies are among the most massive galaxies in the universe and are believed to have rapidly formed their stars a long time ago. However, how these galaxies formed and why have they stopped forming new stars remain mysteries.” -Tao Wang, lead author on this new study There was once a time early on in…

“Motions of the stars tell you how much matter there is. They don’t care what form the matter is, they just tell you that it’s there.” -Pieter van Dokkum Everything in the Universe was born with the same ratios of dark matter to normal matter: approximately 5-to-1. It shows up in everything from the cosmic…

“This suggests a lack of Cepheids in the inner 2.5 kpc region of the Galactic disc except the [Nuclear Stellar Disc].” –N. Matsunaga et al. If you want to find where all the young stars in a galaxy are, you look for the densest regions of gas and dust: the locations where new stars and star…

“He ate and drank the precious Words, his Spirit grew robust; He knew no more that he was poor, nor that his frame was Dust.” -Emily Dickinson When we look at spiral galaxies, we think of grand arms, star-forming regions and dust lanes lining our perspective. But unlike face-on galaxies, where everything looks the same,…

“Another very good test some readers may want to look up… is the Casimir effect, where forces between metal plates in empty space are modified by the presence of virtual particles.” -Gordon Kane If you ask what the zero-point energy of space itself is, you can sum up all of the quantum fluctuations you can…

“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…