Astronomers found quasi-periodic flickers in millimeter-waves from the center of the Milky Way. The team interpreted these blinks to be due to the rotation of radio spots circling the supermassive black hole with an orbit radius smaller than that of Mercury. This is an interesting clue to investigate space-time with extreme gravity.
The discovery of the Wolfe Disk galaxy provides a challenge for many galaxy formation simulations, which predict that massive galaxies at this point in the evolution of the cosmos grew through many mergers of smaller galaxies and hot clumps of gas.
Around the young star AB Aurigae lies a dense disc of dust and gas in which astronomers have spotted a prominent spiral structure with a 'twist' that marks the site where a planet may be forming. The observed feature could be the first direct evidence of a baby planet coming into existence.
Researchers have developed a new spatial plasma-fueled engine capable of satellite and spacecraft propulsion, with magnetic field geometry and configuration that would minimize losses on walls and their erosion, thereby resolving issues of efficiency, durability, and operating restrictions of engines that are currently in orbit.
Recently, researchers have presented a new model that for the first time simultaneously explains the origins of both the Fermi bubbles and the Galactic center biconical X-ray structure, which was discovered in 2003.
Mergers between black holes and neutron stars in dense star clusters are quite unlike those that form in isolated regions where stars are few. Their associated features could be crucial to the study of gravitational waves and their source.
Astronomers have detected elusive pulsation patterns in dozens of young, rapidly rotating stars. The discovery will revolutionize scientists' ability to study details like the ages, sizes and compositions of these stars -- all members of a class named for the prototype, the bright star Delta Scuti.