Bad Astronomy 13 Nov 2019, 14:00 UTC Hypervelocity stars are weird. They were first discovered a couple of decades ago, and like their name suggests, they are stars that are moving. Pretty much every star in the sky is orbiting the center of the galaxy, like the planets orbit the Sun, and those speeds can be fairly high in human terms (the Sun orbits at about 230 kilometers per second).
Astro Watch 13 Nov 2019, 10:55 UTC Scientists have reported detecting gravitational waves from 10 black hole mergers to date, but they are still trying to explain the origins of those mergers. The largest merger detected so far seems to have defied previous models because it has a higher spin and mass than the range thought possible. A group of researchers, including Rochester Institute of Technology Assistant Professor Richard O’Shaughnessy, has created simulations that could explain how the merger happened.
Parabolic Arc 13 Nov 2019, 08:01 UTC On November 13, 2019, JAXA operated Hayabusa2 chemical propulsion thrusters for the spacecraft’s orbit control.* The confirmation of the Hayabusa2 departure made at 10:05 a.m. (Japan Standard Time, JST) was based on the following data analyses:
New Scientist 12 Nov 2019, 17:09 UTC Goodbye Ultima Thule, hello Arrokoth. The space rock that NASA’s New Horizons probe sped past earlier this year has been given a new name: Arrokoth, which means “sky” in the Powhatan and Algonquian languages.
Centauri Dreams 12 Nov 2019, 15:06 UTC It’s good to see the European Space Agency’s ARIEL mission getting a bit more attention in the media. The Atmospheric Remote-sensing Infrared Exoplanet Large-survey was selected earlier this year as an ESA science mission, scheduled for launch in 2028. Here the goal is to cull a statistically large sample of exoplanets to examine their evolution in the context of their parent stars. Giovanna Tinetti (University College London) is principal investigator.
Sky and Telescope 12 Nov 2019, 00:57 UTC I like seeing how the Crescent nebula seems to hang almost like a 3D object in front of the background of hydrogen gas.