For the first time, astronomers have identified a stellar victim of a giant black hole, an unlucky star whose death may ultimately provide more clues on the inner workings of the enigmatic gravitational monster that devoured it. Supermassive black holes are objects millions to billions times the sun’s mass that lurk in the hearts of most galaxies. They lay quietly until victims, such as stars, wander close enough to get shredded apart by their extraordinarily powerful gravitational pull.
The Messier 78 nebula (NGC 2068), is often called the reflection nebula, because its dust particles reflect the starlight that falls on them. These pockets of dust typically hide more interesting cosmic objects, but the new photo of Messier 78 and its surroundings demonstrates the beauty of dust particles in space. Dense clouds of gas and dust are important to astronomers because they are the birthplaces of new stars.
Astronomers have identified group of more than 675 stars , which seem to have been pushed out of our on Milky Way galaxy. The astronomers, Kelly Holley-Bockelmann and Lauren Palladino, say the group of stars they have identified have two characteristics that suggest they’re exiles from the Milky Way: they were found in intergalactic space between our galaxy and the neighbouring Andromeda, but their colour indicates that they originated close to the galactic centre.
According to astronomers at the University of Bonn in Germany, who made the discovery, the structure of satellite galaxies and star clusters around the Milky Way is so vast that it reaches across a million light-years 10 times as wide as the Milky Way itself. Existing dark matter theories fail to explain the arrangement of these cosmic objects. As said study team member Pavel Kroupa, a professor of astronomy at the University of Bon their model appears to rule out the presence of dark matter in the universe, threatening a central pillar of current cosmological theory.
The discovery, made by astronomers using NASA’s Chandra X-ray Observatory, provides new insight into the nature of a mysterious class of black holes that can produce as much energy in X-rays as a million suns radiate at all wavelengths. Researchers used Chandra to discover a new ultraluminous X-ray source, or ULX. These objects give off more X-rays than most binary systems, in which a companion star orbits the remains of a collapsed star.
According to scientists massive alien planet that may have been ripped into Earth-size chunks by its dying parent star is offering a unique glimpse into the evolution of other worlds and their stars. The planet’s two remaining pieces, which researchers tentatively identified as planet-size objects just slightly smaller than Earth, were possibly created when their parent body spiraled inward too close to the bloated red giant star KIC 05807616.
According to a recent study, tens of billions of planets around red dwarfs are likely capable of containing liquid water, dramatically increasing the potential to find signs of life somewhere other than Earth. Red dwarfs are stars that are fainter, cooler and less massive than the sun. These stars, which typically also live longer than Class G stars like the sun, are thought to make up about 80 percent of the stars in the Milky Way, astronomers have said.
Astronomers by using images from NASA’s Wide-field Infrared Survey Explorer (WISE) reveal an old star in the throes of a fiery outburst, spraying the cosmos with dust. The findings offer a rare, real-time look at the process by which stars like our sun seed the universe with building blocks for other stars, planets and even life. The star, catalogued as WISE J180956.27-330500.2, was discovered in images taken during the WISE survey in 2010, the most detailed infrared survey to date of the entire celestial sky.
While some galaxies are rotund and others are slender disks like our spiral Milky Way, new observations from NASA’s Spitzer Space Telescope show that the Sombrero galaxy is both. The galaxy, which is a round elliptical galaxy with a thin disk embedded inside, is one of the first known to exhibit characteristics of the two different types. As said Dimitri Gadotti of the European Southern Observatory in Chile the Sombrero is more complex than previously thought.