Forbes articles by Brian Koberlein 11 Dec 2019, 17:40 UTC A new study finds that Population II stars have two distinct groups, with different origins.
Starts With a Bang! 11 Dec 2019, 15:01 UTC It’s difficult to appreciate how revolutionary of a transformation it is to consider the Universe from Einstein’s, rather than Newton’s, point of view. According to Newtonian mechanics and Newtonian gravity, the Universe is a perfectly deterministic system. If you were to give a scientist who understood the masses, positions, and momenta of each and every particle in the Universe, they could determine for you where any particle would be and what it would be doing at any point in the future. In theory, Einstein’s equations are deterministic as well, so you can imagine something similar would occur: if you could only know the mass, position, and momentum of each particle in the Universe, you could compute anything as far into the future as you were willing to look. But whereas you can write down the equations that would govern how these particles would behave in a Newtonian Universe, we can’t practically achieve even that step in a Universe governed by General Relativity. Here’s why.
Parabolic Arc 11 Dec 2019, 10:23 UTC TUCSON, Ariz. (University of Arizona PR) — The University of Arizona is spearheading work that would begin efforts to construct a space-based infrared telescope that could provide the capabilities NASA needs to search for asteroids and comets that pose impact hazards to Earth, called near-Earth objects, or NEOs.
Air & Space Magazine 10 Dec 2019, 18:30 UTC The world’s largest single-dish radio telescope—the Five Hundred-Meter Aperture Spherical Telescope (FAST) in southern China—is about to start operation after more than three years of testing and commissioning. While the trials have focused on detecting neutron stars, one of the goals during the telescope’s operational lifetime will be to search for signals generated by intelligent extraterrestrials. Since Chinese officials claim that FAST is already three times as sensitive as the Arecibo observatory in Puerto Rico, the second-largest single-dish telescope in the world, we surely expect new discoveries.
Bad Astronomy 10 Dec 2019, 14:00 UTC We've known for some time now that at the heart of every big galaxy lies a supermassive black hole. These monsters earn their moniker: They range from millions to many billions of times the mass of the Sun. These beasts form along with their host galaxy, growing huge pretty rapidly from gas in the young galaxy.