Powered by supermassive black holes swallowing matter in the centers of galaxies, active galactic nuclei are the most powerful compact steady sources of energy in the universe. The brightest active ...

Throughout the course of human spaceflight, astronauts have conducted research on anything from muscle atrophy in microgravity to the psychological effects of long-duration missions. But even though ...

Virgin Galactic's 2027 mission will be the first to directly study menstruation in space. Here's what it will research and ...

Study identifies forming stars whose jets accelerate protons and emit gamma rays, revealing a new cosmic-ray source and ...

Throughout the course of human spaceflight, astronauts have conducted research on anything from muscle atrophy in microgravity to the psychological effects of long-duration missions. But even though ...

Active galactic nuclei (AGN) are the luminous centres of galaxies powered by accretion onto supermassive black holes. Photometric studies, spanning ultraviolet to infrared wavelengths, measure ...

Dr. Li Shasha and Dr. Feng Haicheng from the Yunnan Observatories of the Chinese Academy of Sciences and their collaborators found evidence for the kinematic evolution of the broad-line region of ...