February 09, 2013

The Visible Universe: “Seven Trillion Dwarfs and Billions of Undetected Galaxies” (Weekend Feature)

The European Space Agency’s Herschel space telescope has discovered that previously unseen distant galaxies are responsible for a cosmic fog of infrared radiation. The galaxies are some of the faintest and furthest objects seen by Herschel, and opened a new window on the birth of stars in the early Universe.

Astronomers estimate that their are billions and billions of galaxies in the observable universe (as well as some seven trillion dwarf galaxies) . Here’s how astronomers breakout the visible universe within 14 billion light years:

Superclusters in the visible universe = 10 million

Galaxy groups in the visible universe = 25 billion

Large galaxies in the visible universe = 350 billion

Dwarf galaxies in the visible universe = 7 trillion

Stars in the visible universe = 30 billion trillion (3×10²²)

Read more: The Visible Universe: "Seven Trillion Dwarfs and Billions of Undetected Galaxies" (Weekend Feature).

Home           Top of page