Pioneer 11 was the first spacecraft ever to encounter Saturn. It paved the way for the even-more-sophisticated Voyager spacecraft.
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September’s birthstone, the sapphire, was said to represent the purity of the soul.
An MIT study finds big snowstorms will still occur in the Northern Hemisphere despite global warming.
A NASA sounding rocket has confirmed that the solar system is inside an ancient supernova remnant. Life on Earth survived despite the nearby blasts.
Using telescopes on the ground and in space, astronomers have obtained the best-yet view of a galaxy collision that happened when the universe was half its current age.
You’ll always know it’s the sky’s brightest star, Sirius, if the very noticeable constellation Orion the Hunter is nearby.
Next time you’re brushing you teeth, think on this: New research suggests that the fluorine in your toothpaste originates from the sun’s dead ancestors.
A few days before the NASA spacecraft Voyager 2 skimmed by Neptune in 1989, it acquired images of a faint, continuous ring system encircling the planet.
New image of star-forming regions in southern Milky Way. Star cluster NGC 3603 is 20,000 light-years away. Glowing gas clouds NGC 3576 is about half as far.
You can find the Andromeda galaxy – also known as M31 – in several ways. One is by star-hopping from the Great Square of Pegasus.