SizerooHow wide is Phobos, Mars's bigger moon?
13.7 milesAbout 22 km · Land-sized
About 14 miles (22 km) across, and lumpy like a potato.
A red kangaroo would need about 2,800 hops (26 ft, or 8 m, each) to cover it.
🌑13.7 miles
🎡Southend Pier
To scale: Phobos is about 10× bigger than Southend Pier.
Things about the same size
- How wide is the nucleus of Halley's Comet?9.32 miles
- How high do U-2 spy planes fly?13 miles
- How long is a half marathon?13.1 miles
- How long is the island of Manhattan?13.4 miles
- How tall is Olympus Mons on Mars?13.6 miles
- How long is the Large Hadron Collider?16.6 miles
- How long is the Chesapeake Bay Bridge-Tunnel?17.6 miles
- How wide is the English Channel at its narrowest?20.7 miles
Many real things vary in size, so we use a typical or official figure. Spotted a mistake? Email [email protected].