Scale Comparison
Earth is about 2.6 times Mercury's diameter; Mercury is the smallest of the eight major planets.
Mercury is slightly smaller than Ganymede and Titan, but its large iron core makes it nearly three times as dense as those icy moons.
Objects
Mercury is the smallest planet in the Solar System and the closest one to the Sun. Because of its unusual spin-orbit rhythm, one Mercury solar day lasts 176 Earth days, which is longer than its 88-day year.
Earth is the largest of the four rocky planets and the only world known to host life. Liquid water has covered most of its surface for billions of years, shaping both its geology and its atmosphere.
Continue reading
Continue with another comparison or open the full scale.
About
Scale of Space is a scroll-based journey through the universe, placing objects on a single logarithmic scale so you can compare size across an unbroken range.
Guides explain selected parts of that range, while focused views filter the objects by subject.