13.8 billion years and counting: How we discovered the Universe’s age

Scientists figured out that the universe is billions of years old — after years of reading ancient rocks and dying stars, and ...

How we discovered the Universe’s age — from old rocks to giant stars

Scientists figured out that the universe is billions of years old - after years of reading ancient rocks and dying stars, and ...

OTD in Space - October 13: Charles Messier Discovers the 'Whirlpool Galaxy'

On Oct. 13, 1773, a French astronomer named Charles Messier discovered the "whirlpool galaxy," also known as Messier 51, or ...
Astronomy on MSN

Unveiling the Andromeda Galaxy's true nature

Over the course of human history, perhaps no single object in the night sky has drawn more attention than the Andromeda Galaxy, which the 10th-century Persian astronomer Abd al-Rahman al-Sufi dubbed a ...