Was the Star of Bethlehem a real astronomical event?
Did the Catholic Church simply make up 300 years of early Medieval history? Astronomy clearly says no.
Ancient astronomers tell us how Earth’s days have lengthened.
The history of dark matter spans more than a century, and continues to raise interesting questions.
As the Apollo missions came to a close, some dreamed of an even bigger mission to reach the stars.
When a telescope collapsed in 1988, it led to the creation of one of the most powerful radio telescopes ever built.
Throughout most of history the stars were thought to be fixed in place. We now know they move relative to each other.
In 1967 two U.S. satellites detected a burst of gamma rays that didn’t match the signature of any known nuclear detonation.
Galileo’s discovery of the moons of Jupiter gave us a “heavenly clock” we could use to map the Earth.