“Textbooks will need to be updated,” study co-author Yohai Kaspi, a planetary scientist at the Weizmann Institute of Science in Israel, said in a statement. “The size of Jupiter hasn’t changed, of ...

Jupiter may be a bit more petite than expected, and that could have a big impact on how scientists model the mysterious ...

Jupiter is officially “smaller” than it was yesterday. To be clear: the planet itself didn’t physically contract overnight.

According to this early data, Jupiter’s equatorial radius was around 44,423 miles (71,492 kilometers), and its polar radius ...

For over 50 years, we thought we knew the size and shape of Jupiter, the solar system's largest planet. Now, Weizmann ...

Looking for a sky event this week? Check out our full Sky This Week column. February 3: Uranus stands still Io and its shadow ...

NASA’s Juno spacecraft finds Jupiter’s diameter slightly smaller than old estimates, providing precise data on the gas ...

January brings long, cold nights rich with astrophotography targets. The month opens with a full Wolf Moon, followed quickly by the Quadrantid meteor shower peaking, albeit under bright moonlight.

Jupiter is the object you’ll want to be watching this evening, as Ganymede prepares to transit along with its shadow. About an hour before that event starts, Ganymede and Europa line up as the two ...

Using data gathered by NASA's Juno Jupiter orbiter, scientists estimate that Europa's ice shell is about 18 miles thick — ...

The Italian scientist Galileo Galilei, when hearing about the invention of the telescope in 1608, decided to make his own ...