Looking for a sky event this week? Check out our full Sky This Week column. January 12: Io's post-opposition transit Point ...

The solar system’s largest planet shines bright as the Moon wanes and Saturn’s moons dance in the sky this week.

Looking for a sky event this week? Check out our full Sky This Week column. January 13: Ganymede's turn to transit Ganymede is transiting Jupiter with its shadow as January 14 opens subsequently in ...

Jupiter’s moon Ganymede could be a vast dark matter detector, and upcoming space missions might be able to spot distinctive dark matter craters on its ancient surface. Physicists searching for dark ...

On Dec. 28, 2000, NASA’s Galileo spacecraft discovered auroras on Ganymede, Jupiter’s largest moon. Galileo launched in 1989 on a mission to study Jupiter and its moons. It also flew by Venus and ...

When searching for the unknown, classic physics wisdom holds that a bigger detector boosts the chances of discovery. A physicist is taking that advice to heart, advancing a bold plan to use none other ...

On November 16, a waning crescent Moon, exhibiting earthshine, will pass 1.2° south of Spica in the early morning sky, with Venus also visible and appearing 98 percent illuminated. During the evening ...

Although Europa is the fourth largest of Jupiter’s 95 moons, it’s the smallest of the Galilean moons – the largest being Ganymede. With an equatorial diameter of about 3,100 kilometres, Europa is ...

Could the icy moons of our solar system hold life beyond our planet? Keith Cooper looks at how planetary scientists plan to find out ...