Hosted on MSN2mon
On this date: Galileo discovers three major moons of Jupiter
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 ...
HowStuffWorks on MSN6mon
The Milky Way: Understanding Our Place in the Galaxy
It was in the year 1610 that Galileo Galilei, with the aid of one of the first telescopes, began to decipher this celestial ...
PBS3y
Two Types of Telescopes
Well, any of us who has ever looked through a telescope could say the same, for the two principal types in use today were developed by giants: the refractor by Galileo and the reflector by Newton.
Hosted on MSN3mon
How Do Telescopes Work? Astronomy's Most Indispensable Tool, Explained
Credit: Galileo Galilei, 1610 Within sixty years, Isaac Newton had built his own new and improved reflecting telescope with a curved mirror, coated with a fine layer of reflective silver metal ...
Hosted on MSN11mon
NASA's Juno probe captures amazing views of Jupiter's volcanic moon Io (video)
The four biggest moons of Jupiter aren't just blurry smudges in Galileo's telescope anymore. The Italian astronomer Galileo Galilei discovered Ganymede, Callisto, Europa and Io back in 1610, which ...