Question: What is the biggest star we know? Answer: The largest known star (in terms of mass and brightness) is called the Pistol Star. It is believed to be 100 times as massive as our Sun, and …

Eris When Eris was first found, it was called Xena. Xena was the name of a warrior princess on a television show.

Olympus Mons Olympus Mons is the tallest mountain in the . Its peak is over 26 above its base. Olympus Mons is called a shield volcano because of its shape. The volcano is very tall, but it has a …

After Eris and Pluto, Makemake is the third largest known dwarf planet. Along with fellow dwarf planets Pluto and Haumea, Makemake is located in the Kuiper Belt, a region outside the orbit of Neptune.

The Universe Listen to an audio version of this page. Sorry, your browser does not support the audio element, please consider updating. The universe is a huge wide ...

The largest satellite is Triton. Due to Triton's retrograde orbit, its density, and its composition, astronomers theorize that Triton was not originally a satellite of Neptune. They theorize that Triton …

After Pluto and Eris, Makemake is the third largest dwarf planet. It takes this dwarf planet 310 Earth years to make one orbit around the Sun. At this time, no moons have been discovered in orbit …

Ceres was the largest known asteroid in the asteroid belt until 2006. In 2006, the International Astronomical Union formed a new class of solar system objects known as dwarf planets. By …

StarChild Question of the Month for August 1999 Question: What causes a "falling star"? Answer: A "falling star" or a "shooting star" has nothing at all to do with a star! These amazing streaks of light …

The Sun is our closest star. It is a member of the Milky Way galaxy. The Sun is a yellow dwarf star, which means it is a medium size star. It is believed to be over 4 billion years old. The Sun spins …