There’s something about comparing the sizes of unthinkably large objects that’s endlessly intriguing. Looking at a comparison of all the various sizes of stars in the universe, for example, makes for ...

An animation posted to Twitter has shocked social media users by showing the impressive size of Jupiter and just how rapidly the solar system's largest planet rotates. The animation posted by ...

Using an innovative new telescope array, an international team of researchers has discovered a distant gas giant roughly the size of Jupiter around a star half the size of ours. It’s considered the ...

We have detected only one transiting planet that has a mass below 10 Earth masses. This world, CoRoT-7b (named after the European Convection, Rotation and planetary Transits satellite) has a radius ...

Astronomers have discovered seven roughly Earth-size planets very close to a cool dwarf star some 39 light-years from Earth, including three orbiting in the star’s habitable zone where liquid water, a ...