Universe’s First Stars Appeared 100 Million Years Later than Thought.

New research Based on the data acquired by European Space Agency’s Planck space telescope reveals that the first stars were bursted 100 million years later than previously thought.

A few hundred million years after the Big Bang, the light from some of the very first stars and galaxies lit up the universe and ended a period known as the "dark ages,"  which is a period of the universe when there is no star glowing in it.

"While these 100 million years may seem negligible compared to the universe's age of almost 14 billion years, they make a significant difference when it comes to the formation of the first stars," Marco Bersanelli of the University of Milan and a member of the Planck Collaboration said.

A major source of information used to piece together this story is the Cosmic Microwave Background, or CMB. CMB is the fossil light resulting from a time when the Universe was hot and dense, only 380,000 years after the Big Bang.

Over the past two years, scientists have published a large number of research papers based on the observation of planck space telescope.

Thanks to the expansion of the Universe, we see this light today covering the whole sky at microwave wavelengths. The "microwave wavelengths"  that's what the planck space telescope observes and from this observation we learn about the history of our universe.

Image Credit : ESA and the Planck Collaboration/ESA