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 ...

Ganymede is one of the four moons (Io, Europa, and Callisto are the others) that Galileo observed in 1610 from a tower that has its double at the King Street Station. The discovery presented the first ...

Looking for a sky event this week? Check out our full Sky This Week column. May 21: Check in on Saturn and Mars Tonight we're ...

There’s no mistaking Jupiter in the sky these Pottsville winter evenings, rising in the southeast as evening twilight ends. In fact you should be able to easily see it long before twilight fades.

Europa, one of the four large moons of Jupiter first seen by Galileo 414 years ago, may have a deep, salty, global ocean hidden beneath a thick crust of ice. Where there is water, there might be life.

Add Yahoo as a preferred source to see more of our stories on Google. On Dec. 8, 1990, NASA's Galileo spacecraft flew by Earth on its way to Jupiter. Galileo was the first spacecraft to study Jupiter ...

There’s no mistaking Jupiter in the sky these winter evenings, rising in the southeast as evening twilight ends. In fact, you should be able to easily see it long before twilight fades. Jupiter is by ...