New research from a team at the Harvard Center for Astrophysics suggests that the Large Magellanic Cloud, a dwarf galaxy neighboring the Milky Way, hosts a gravitational structure hundreds of thousands of times the mass of the sun: a potential supermassive black hole. The most widely accepted theory of galactic evolution holds that supermassive black holes are found only in the largest galaxies, such as the Milky Way. Until now, there was no reason to imagine that a small cluster like the Large Magellanic Cloud could host one. When x-ray telescopes or observatories have been trained on smaller clusters like the Large Magellanic Cloud, they have found no signatures associated with black hole activity. But then came the hypervelocity stars. For nearly 20 years, astronomers have spotted fast-traveling stars with enough acceleration to be ejected from their own galaxies. While a traditional star moves at about 100 kilometers per second, a hypervelocity star travels up to 10 times faster. Experts think such stars appear by being 'catapulted outward' by a supermassive gravitational structure under the Hills mechanism'which is where a binary star system interacts with a black hole, with one star captured by the black hole and the other flung away from it....

Sometimes politics resembles one of the weirder branches of modern physics or a fantasy version of biology. Time may seem to run backwards; solid things turn out to be insubstantial; black holes swallow up the light; the dead may walk the Earth, ghouls crawl out of cleft rocks, velociraptors not only reappear but learn to speak and, alarmingly, open doors. That is how American politics feels at the moment. By and large, however, Newtonian physics and traditional biology still apply, and that is worth remembering as we watch the Trump administration's circus of transgression, vindictiveness, and sometimes mere folly. Like most administrations, including those of considerably more sedate chief executives, that of the 47th president has decided to way overinterpret its mandate. The brute facts remain: Donald Trump received a plurality of votes (albeit a decisive majority in the Electoral College); the Republican Party is holding on to the House of Representatives by a hair and has a slim majority in the Senate. The administration may hate civil servants and seek to undermine their job security, but it will discover that it needs them to keep airplanes flying safely, the financial system functioning, drugs safe for use, and food fit for consumption....

Fast radio bursts are brief and brilliant explosions of radio waves emitted by extremely compact objects such as neutron stars and possibly black holes. These fleeting fireworks last for just a thousandth of a second and can carry an enormous amount of energy ' enough to briefly outshine entire galaxies. Since the first fast radio burst (FRB) was discovered in 2007, astronomers have detected thousands of FRBs, whose locations range from within our own galaxy to as far as 8 billion light-years away. Exactly how these cosmic radio flares are launched is a highly contested unknown. Now, astronomers at MIT have pinned down the origins of at least one fast radio burst using a novel technique that could do the same for other FRBs. In their new study, appearing today in the journal Nature, the team focused on FRB 20221022A ' a previously discovered fast radio burst that was detected from a galaxy about 200 million light-years away. The team zeroed in further to determine the precise location of the radio signal by analyzing its 'scintillation,' similar to how stars twinkle in the night sky. The scientists studied changes in the FRB's brightness and determined that the burst must have originated from the immediate vicinity of its source, rather than much further out, as some models have predicted....

MIT Professor Emeritus Hale Van Dorn Bradt PhD '61 of Peabody, Massachusetts, formerly of Salem and Belmont, beloved husband of Dorothy A. (Haughey) Bradt, passed away on Thursday, Nov. 14 at Salem Hospital, surrounded by his loving family. He was 93. Bradt, a longtime member of the Department of Physics, worked primarily in X-ray astronomy with NASA rockets and satellites, studying neutron stars and black holes in X-ray binary systems using rocket-based and satellite-based instrumentation. He was the original principal investigator for the All-Sky Monitor instrument on NASA's Rossi X-ray Timing Explorer (RXTE), which operated from 1996 to 2012. Much of his research was directed toward determining the precise locations of celestial X-ray sources, most of which were neutron stars or black holes. This made possible investigations of their intrinsic natures at optical, radio, and X-ray wavelengths. 'Hale was the last of the cosmic ray group that converted to X-ray astronomy,' says Bruno Rossi Professor of Physics Claude Canizares. 'He was devoted to undergraduate teaching and, as a postdoc, I benefited personally from his mentoring and guidance.'...