The active galactic nucleus is a compact region at the center of a newly discovered galaxy The active galactic nuclei release huge amounts of ionized particles and energy into the galaxy and its environment These ultimately contribute to the growth of the medium around the galaxy and ultimately the evolution of the galaxy itself.
"We know that acidic fluids have flowed on the surface of Mars in the past, altering the clays and its capacity to protect organics," Fairen said. He added that the internal structure of clay is organized into layers, where the evidence of biological life -- such as lipids, nucleic acids, peptides and other biopolymers -- can become trapped and well preserved. In the laboratory, the researchers simulated Martian surface conditions by aiming to preserve an amino acid called glycine in clay, which had been previously exposed to acidic fluids. "We used glycine because it could rapidly degrade under the planet`s environmental conditions. It`s perfect informer to tell us what was going on inside our experiments," he said.
Astronomers have been closely observing a star located some 190 light years away from Earth for over 100 years now and HD 140283 is also believed to be one of the oldest known stars in universe. In 2000, astronomers tried to date the star using the European Space Agency's (ESA) Hipparcos satellite and concluded that the star is around 16 billion years old. The age of this star is surprising because according to astronomer Howard Bond of Pennsylvania State University, the age of the universe is 13.8 billion years.
Astronomers have spotted a record-breaking explosion created by a black hole some 390 million light-years away in the universe. According to CNN.com, this record-breaking, gargantuan explosion came from a black hole in a distant galaxy cluster hundreds of millions of light-years away, the astronomers said.