An astronomer from Liverpool John Moores University has discovered a new family of stars in the core of the Milky Way which provides new insights into the early stages of the galaxy’s formation. The discovery has shed new light on the origins of globular clusters formed at the beginning of the Milky Way’s history.
Elliptical and Lenticular galaxies (historically referred to as early-type galaxies) are thought to be no longer giving birth to new stars. Now, a team led by astronomers from the Instituto de Astrofísica e Ciências do Espaço (IA) in Portugal has discovered optical spiral features in the outskirts of three nearby early-type galaxies, which points to a still ongoing inside-out growth.
An international team has found an extremely faint dwarf satellite galaxy of the Milky Way using the Hyper Suprime-Cam (HSC) on the 8.2-metre Subaru Telescope located at the Mauna Kea Observatory on Hawaii. Named Virgo I, the galaxy lies 280,000 light-years away in the constellation of Virgo. The galaxy may well be the faintest satellite galaxy yet found.
Astronomers may have solved the mystery of the peculiar volatile behaviour of a supermassive black hole at the centre of a galaxy known as Markarian 1018 some 590 million light-years away. Combined data from NASA’s Chandra X-ray Observatory and other observatories suggest that the black hole is no longer being fed enough fuel to make its surroundings shine brightly.
University of Florida astronomers have discovered the first “binary-binary” — two massive companions around one star in a close binary system, one so-called giant planet and one brown dwarf, or “failed star.” For such large companion objects to be stable so close together defies our current popular theories on how solar systems form.
Each year, NASA’s Chandra X-ray Observatory helps celebrate American Archive Month by releasing a collection of images using X-ray data. Each of these six new images — representing just a small fraction of the treasures that reside in Chandra’s unique archive — also includes data from telescopes covering other parts of the electromagnetic spectrum, such as visible and infrared light.