Cosmic Dawn Astronomers Find Fingerprints


Astronomers observe the universe’s first stars

Stars seeding the universe. It is seeding the universe with heavy elements. The elements which are heavy on the periodic table. They are forming the generation of stars. A new galaxy is found. which is named cr7. It happened after 800 million years. Which means 13.8 billion years ago. Scientists got shocked.

they examed the chemical structures. They found strong ionized helium emissions. It is really surprising. There is no sign of heavy material or elements. This a new clue. Which leads us to the first generation stars. they consist of hydrogen, helium and trace amounts of lithium. The prime materials which helped to form Big Bang.

they possess a unique chemical composition. These first generation stars show the difference between these present stars. Astronomers have some different theory. They think they were all very massive. they were bigger than the mass of the Sun.

they lived a few million years. but the sun lived 12 billion years. they died in a supernovae explosion. after that, all generations of stars. planets and other celestial bodies. which includes oxygen, iron, calcium. the compounds which run the human body.

astronomer Richar Ellis has the theory. he is working at California Institute of Technology. they use NASA’s Hubble Space Telescope to travel backward. it can go back to  Big Bang itself. his team is searching the newborn stars.

Richard Ellis explained

“At some point a billion or so years after the Big Bang, gravitational attraction caused the gas that filled the Universe to collapse and form the first stars. Searching for signs of those stars.  which we call First Light. is one of the most interesting challenges in modern astronomy.” The search is daunting because such stars lie more than 10 billion light-years from Earth. They’re very faint. Even powerful instruments like Hubble have trouble detecting them.