Sun-like stars can eat planets in space, larger galaxies can “eat” the smaller ones, and a black hole can devour other black holes. According to a recent study published in Nature Astronomy, 20-35 percent of allSun-like stars consume planetsorbiting around them. Fortunately, our Sun is ...
Currently, one of our nearby neighbors, the Sagittarius dwarf galaxy, is being tidally disrupted (a dwarf galaxy has less than about 1% of the stellar mass of a normalspiral galaxylike the Milky Way, and often much less). Two other nearby dwarfs, the Large and Small Magellanic Clouds (with...
Betelgeuse is known for being a type of "variable star," meaning its brightness fluctuates, at times dramatically, as it inches toward an eventual grandiose collapse and stellar explosion, known as a supernova. In recent years, the star has grown noticeably brighter....
A star that shone with 2.5 million times the light of our Sun has disappeared from the night sky. It is possible that the star collapsed into a black hole without first triggering a supernova – a rare event, even in the context of dying stars. The errant star is,or was,located in t...
Keck Observatory, atop the lofty Mauna Kea in Hawai'i, to observe the climatic "powerful flash" and intense release of energy. The blast was conspicuous, even in a distant galaxy filled with luminous stars. "It takes just one supernova to outshine all the other stars in the galaxy," ...
How many stars are there in the universe?(不需要准确数字)Where do they come from and where do they go to?What is the most common chemical element in the universe?How are all the other chemical elements formed?Define the terms:Galaxy,nebula,black hole,supernova,comet,asteroid,meteorite(这...
The SN type can be determined from the host galaxy type: an evolved, red elliptical lack-ing enough recent star formation to provide a significant population of core-collapse supernovae. The classification is further supported by diagnostics available from the observed colors and tem-poral behavior...
Machine-learning technology developed at Los Alamos National Laboratory played a key role in the discovery of supernova ASASSN-15lh, an exceptionally powerful explosion that was 570 billion times brighter than the sun and more than twice as luminous as t
Astronomers at the University of Massachusetts Amherst report that they have observed the most luminous galaxies ever seen in the Universe, objects so bright that established descriptors such as "ultra-" and "hyper-luminous" used to describe previously b
Our hero is a tough-boy British Special Boat Operative, who gets betrayed by a friend and suspects a mole, then goes out to save the world. Alamy Stock Photo "Stratton" had one of the worst box office bombs in recent years, earning ...