Kepler: The Little Telescope That Could

A year after a potentially fatal setback, a rejuvenated Kepler telescope discovered the first exoplanet (outside the solar system) of its new mission.

Where is Water From? Probably Not Comets

A recently completed analysis of comet 67P/C-G by the Rosetta Space Craft has effectively ruled out comets as the primary source of Earth’s water.

How to Catch a Comet

Last week, the European Space Agency (ESA) successfully landed an unmanned probe (Philae) on a comet, a feat heretofore unmatched in human history

The Cassini Saturn Mission and the Allure of the Unknown

What the Cassini Saturn Mission teaches us about scientific discovery

Laika: The First Earthling in Space

The first Earthling was Laika, a Russian mongrel found on the streets of Moscow.

Ole Rømer and the Speed of Light

September marks two significant dates in the early history of astronomy and physics—the birthday of Danish astronomer Ole Rømer ...

Space Is The Place: The US, USSR, and Space Exploration

Even during the Cold War, US and Russian cooperation succeeded in space exploration.