Staring at the sun—a close (but safe) look at our home star ... a new idea to keep kids entertained? Try stargazing. Free learning activities and videos about the solar system Free learning ...

Since its discovery in 1930, until 2006, Pluto was counted as the ninth planet in the solar system. In 2006, the International Astronomical Union reclassified it as a ‘dwarf planet’, and our ...

As Farnocchia pointed out, "there could be way more dark comets than we know" in the inner Solar System, which highlights the importance of studying these objects. NASA has now been using advanced ...