Our sun is a lonely star. At least half the stars in our galaxy have binary companions. This was nicely illustrated in the ...

Galileo Galilei's telescopic discovery of Jupiter's four moons in 1610 revolutionized astronomy and supported heliocentric ...

Italian astronomer Galileo Galilei peered through his newly improved 20-power homemade telescope at the planet Jupiter. He ...

Early trebuchets were built on site. As they grew increasingly large and powerful, wagons carrying sections of prefabricated ...

Ancient civilizations believed orbits were perfect circles, a reflection of divine creation. It wasn’t until Johannes Kepler, in the early 17th century, that the elliptical nature of planetary orbits ...

The telescope will catalogue billions of new objects and produce a new map of the entire night sky every three days with the largest digital camera ever made. High atop Chile’s 2,700-meter Cerro ...

On this day three years ago, we witnessed the nail-biting launch of the James Webb Space Telescope (JWST), the largest and most powerful telescope humans have ever sent into space. It took 30 ...

(Johannes Kepler via CNN Newsource ... And Kepler’s long-forgotten drawings, made before the advent of telescopes, were dusted off this year when scientists analyzed them to learn more about ...

Johannes Kepler While each cycle of waxing and waning solar activity typically takes about 11 years, there have been times when the sun behaved differently than expected. And Kepler’s long-forgotten ...

Separately, centuries after German astronomer Johannes Kepler made sketches of sunspots ... made before the advent of telescopes, were dusted off this year when scientists analyzed them to learn ...

Separately, centuries after German astronomer Johannes Kepler made sketches of sunspots in 1607 from ... And Kepler’s ...