In the fall of 1659, Christiaan Huygens observed the opposition of Mars, drawing what he saw. The result was the first ...

As Huygens parachuted to the surface of Titan in January 2005, a battery of telescopes around the world were watching or listening. The results of those observations are now being collected together ...

In the 17th century, astronomers Christiaan Huygens and Giovanni Cassini pointed some of the earliest telescopes at Saturn and made a surprising ...

During the weekend, the orbits of Earth and Saturn will combine to create an interplanetary optical illusion for anyone with ...