Gravity

Category archives for Gravity

“It may be that ultimately the search for dark matter will turn out to be the most expensive and largest null result experiment since the Michelson-Morley experiment, which failed to detect the ether.” -John Moffat Dark matter is a puzzle that’s now more than 80 years old: the presence of all the known, observable, detectable…

“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…

“Astronomers are greatly disappointed when, having traveled halfway around the world to see an eclipse, clouds prevent a sight of it; and yet a sense of relief accompanies the disappointment.” –Simon Newcomb Next year, on August 21st, 2017, millions of Americans will delight in the first total solar eclipse to go from coast-to-coast in 99…

“Dimension regulated the general scale of the work, so that the parts may all tell and be effective.” -Vitruvius In a four-dimensional Universe (3 space and 1 time), it’s easy to get lost. If you take a random walk, the chances of you coming back to your original starting point in a finite number of…

“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…

“How well I have learned that there is no fence to sit on between heaven and hell. There is a deep, wide gulf, a chasm, and in that chasm is no place for any man.” -Johnny Cash The largest mountains, the greatest chasms, steepest cliffs and the tallest peaks on Earth are certainly impressive, particularly…

“You can be the Moon and still be jealous of the stars.” -Gary Allen Earlier this week, NASA announced the discovery of Asteroid 2016 HO3, calling it Earth’s second moon. And it turns out that this is an object in a stable orbit, the same distance from the Sun as the Earth, that can be…

“We shall not cease from exploration, and the end of all our exploring will be to arrive where we started and know the place for the first time.” -T.S. Eliot Now that not just one but two gravitational wave events have been directly detected, we’re officially in the era of true gravitational wave astronomy. LIGO…

“It turned out that nature was very kind, and there appear to be many of these black holes in the Universe and we were lucky enough to see one.” -Dave Reitze, executive director of LIGO On September 14th, 2015, just days after turning on, the twin Advanced LIGO detectors detected the first gravitational wave signature:…

“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…