ADVERTISEMENT
  About the SA Blog Network

Posts Tagged "reionization"

Observations

Astronomers Identify Very Distant (But Not the Most Distant) Galaxy

distant galaxy 13 billion years ago

The universe is a big place, and by peering across it astronomers get to look back in time. A galaxy or supernova so far away that it takes two billion years for its light to reach us will be seen here as it appeared two billion years ago. Remarkably, today’s best telescopes can look across [...]

Keep reading »

More from Scientific American

Scientific American Special Universe

Get the latest Special Collector's edition

Secrets of the Universe: Past, Present, Future

Order Now >

X

Email this Article

X