Tag: Researchers

Astronomers tracking star formation activity of the young Universe billions of years ago have long been intrigued by the fact that star formation in galaxies which was at its  highest about 8-10 billion years ago, had declined steadily thereafter. Searching for the reason behind this, they have found that the likely cause for the decline is that galaxies were running out of fuel. The fuel critical to hydrogen formation is atomic hydrogen gas content of galaxies. Two studies that measured the atomic hydrogen content 9 billion years ago and 8 billion years ago, respectively, have helped them come to this ... Read more