The universe is full of surprises—like planets so massive they outsize some stars. Explore the fascinating size comparisons that challenge the norm!

The Sun makes up 99% of all the mass in the Solar System ... The largest object is the asteroid belt is the dwarf planet Ceres, which is 950km in diameter (that's about the same the length ...

Astronomers now routinely discover planets orbiting stars ... the Thirty Meter Telescope and the 24.5-meter Giant Magellan Telescope. These telescopes are all under construction and set to start ...

Using data from NASA's now-defunct Dawn spacecraft, scientists have discovered that the dwarf planet Ceres, the second wettest body in the solar system after Earth, could have an interior reserve ...