Nicknamed "blood moon," some ancient cultures regarded a total lunar eclipse as an ominous event. Today, this celestial phenomenon generates excitement and wonder.
Astronomers have discovered the first known dwarf planet to host a ring system. The egg-shaped world, called Haumea, is located in the Kuiper belt, beyond the orbit of Neptune.
Pluto is one of the most mysterious and controversial celestial objects in the solar system. Find out what most mystifies scientists and stargazers about this dwarf planet.
Research over the last 10 years has shown that sunquakes can be produced when solar flares—huge explosions of energy in the Sun’s atmosphere—impact and travel into the Sun. The quakes appear as circular ripples on the surface of the Sun.
