On this date, Jan. 7, 1610, astronomer Galileo Galilei, with a homemade telescope, noticed three points of light near Jupiter. Initially believing they were distant stars, Galileo’s repeated ...

KNARESBOROUGH, UK — It's a cold afternoon in the charming village of Knaresborough in Yorkshire, England. Some are out braving the weather, but not me. I'm sitting in a cozy studio, studying the ...

Looking for a sky event this week? Check out our full Sky This Week column. October 13: The Moon reaches Last Quarter The Moon rises together with Jupiter around midnight on October 13 and are visible ...

On April 11th, Jupiter's Great Red Spot will be centrally visible around 8:45 PM EDT, and Io will transit Jupiter, beginning around 8:30 PM EDT, with its shadow following shortly after. Other Galilean ...

Scientists have gotten a never-before-seen look at an area around a large exoplanet 625 light-years away where moons like the one orbiting Earth could potentially form. Using data from NASA’s James ...

Webb Telescope spots a carbon-rich disk around a distant planet, CT Cha b, offering rare clues to how moons may form.

The predawn hours of Aug. 8 present a perfect opportunity to see Jupiter's four largest moons line up next to the "King of the Planets" as it voyages through the stars of the constellation Gemini.

Star Gazers is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku, Samsung Smart TV, and ...