How big it is: 865,000 miles (1.392 million kilometers) across How far away it is: 93 million miles (150 million km) What ...

NASA's Voyager spacecraft has uncovered a cosmic marvel: a blazing 'wall' of heat beyond our Solar System, hinting at the ...

For years, astronomers have been searching for a mysterious ninth planet lurking in the dark outer reaches of our solar ...

Our solar system is estimated to be about 4.57 billion years old. Previous analyses of ancient meteorites have shown that minerals were created through chemical reactions with water as far back as ...

Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky A cloud of collapsing gas created our Sun, the first thing to form in ...

Created just a split second after the Big Bang, these hypothetical black holes would whip quietly through the solar system roughly once every few years, traveling over a hundred times faster than ...

Large sphere model of the solar system in the American Museum of Natural ... to making it scientifically accurate. That’s what created the perfect conditions to stumble upon something new ...

Upon the discovery of its existence in 1930, Pluto enjoyed decades of special status as one of the solar system's planets ... for being a planet that were created in that 2006 IAU meeting.

Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky A cloud of collapsing gas created our Sun, the first thing to ...