On January 7, 1610, the Italian astronomer Galileo discovered three of Jupiter's moons: Callisto, Europa and Io. When he ...

Stephen Hawking was born exactly 300 years after Galileo Galilei died. Their death and birth, exactly 300 years apart on ...

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.

Galileo Galilei, with a homemade telescope, noticed three points of light near Jupiter. Initially believing they were distant ...

Maybe you received a telescope during the holiday season, or perhaps you’ve gifted yourself with a scope. I want you to get ...

3 min read The Hubble Space Telescope was designed to free astronomers of a limitation that has plagued them since the days of Galileo—Earth's atmosphere. Shifting air pockets in the atmosphere ...

Saturn’s rings are among the most glorious, stunning, and well-studied features in the Solar System. However, their age has ...

The Hubble Space Telescope’s distance from the Earth will ... most important telescope in history after the original built by Galileo, the Hubble Space Telescope has offered humanity an ...

📅 Today in History: In 1610, Italian astronomer Galileo Galilei, through improvements he made on a homemade telescope, first observed Jupiter’s four Galilean moons: Ganymede, Callisto, Io and Europa.

Galileo Galilei made an important discovery about Venus much later. He observed the planet not only waxing and waning through a telescope, but also appearing to change size. This showed him the ...