The surface area of the Moon is about 37.9 million square kilometers, roughly equivalent to the combined land area of Africa and North America.
What’s the area of Earth and the Moon?
Earth’s total surface area is 510.1 million square kilometers, while the Moon’s is 37.9 million square kilometers.
Earth’s surface breaks down to about 71% water (361.1 million km²) and 29% land (149 million km²). The Moon’s surface area is slightly smaller than Asia’s landmass (44.6 million km²), making it roughly 7.4% of Earth’s total. These numbers come from NASA’s Lunar Reconnaissance Orbiter mission data collected in 2026.
How much bigger is Earth than the Moon?
The Moon isn’t bigger — it’s about 27% the size of Earth by diameter and less than 2% by volume.
The Moon’s diameter is 3,474 km compared to Earth’s 12,742 km. Its mass is 7.342 × 10²² kg, which is about 1/81st of Earth’s. Despite looking large in the night sky, the Moon is tiny in every physical dimension. That’s why lunar gravity is only about 16.6% of Earth’s, affecting everything from walking to how dust settles on the surface.
Is the U.S. larger than the Moon?
The Moon is smaller than the United States when comparing maximum width.
The continental U.S. stretches about 4,500 km (2,800 miles) from Maine to Florida. The Moon’s diameter is only 3,474 km (2,159 miles), so the U.S. is wider. Teachers often use this comparison to help students grasp the Moon’s actual size. It’s a great way to bust the myth that the Moon is bigger than North America.
Which country beats the Moon in width?
Australia is wider than the Moon by about 600 kilometers.
Australia spans roughly 3,984 km (2,475 miles) from east to west at its widest points. The Moon’s diameter is 3,474 km (2,159 miles). While the Moon has more total surface area (37.9 million km² vs. Australia’s 7.7 million km² land area), Australia wins in straight-line width. It’s a fun fact that pops up in geography and astronomy chats.
What’s the Moon’s rank in the solar system?
| Celestial Body | Rank |
|---|
| Sun | 1 |
| Moon | 2 |
| Jupiter | 3 |
| Uranus | 4 |
| Mercury | 5 |
What’s the Moon’s phase today?
Right now, the Moon appears as a waning crescent, about 99.88% illuminated.
The exact phase depends on your location and time zone. For the most accurate daily update, check NASA’s Lunar Phase and Libration tool or apps like Moon Phase Calendar. A 99.88% illuminated Moon means it’s nearly full — just a tiny sliver is in shadow. That’s why it casts such strong shadows at night.
How much does the Moon weigh?
The Moon’s mass is 7.342 × 10²² kilograms, about 1.2% of Earth’s mass.
Earth weighs roughly 81 times more than the Moon. Even though it’s smaller, the Moon’s density is lower (3.34 g/cm³) compared to Earth’s (5.51 g/cm³), so a chunk of Moon rock weighs less than the same chunk of Earth rock. This density difference shapes the Moon’s gravity and how it tugs on Earth’s oceans. The GRAIL mission mapped the Moon’s gravity field in 2023 to confirm these numbers.
What happens if the Moon hits Earth?
A Moon-Earth collision would be catastrophic, likely cracking Earth’s crust and sparking global firestorms.
Even a close call would mess up Earth’s orbit, making seasons erratic and climates extreme. The Moon is actually drifting away at about 3.8 cm per year, so a direct hit is extremely unlikely. Still, scientists model this scenario to understand how planets form and why stable orbits matter for life.
Give me five cool Moon facts.
- The Moon’s surface is darker than fresh asphalt — it reflects just 12% of sunlight, like old charcoal.
- The Sun and Moon aren’t the same size — the Sun is 400 times wider but also 400 times farther away, so they look the same in our sky.
- The Moon is inching away from Earth — it drifts about 3.8 cm (1.5 inches) per year thanks to tidal forces.
- The Moon formed from a giant smash — a Mars-sized object slammed into early Earth, blasting debris that clumped into our Moon.
- The Moon drives Earth’s tides — its pull creates two high tides daily, shaping marine life and coastal ecosystems.
How cold does it get on the Moon?
Moon temperatures swing from 127°C (260°F) in sunlight to -173°C (-280°F) in darkness.
No atmosphere means no temperature control. Night lasts about 14 Earth days, letting heat vanish into space. Daytime heats the surface fast under unfiltered sunlight. These extremes make the Moon one of the solar system’s most brutal environments. Astronauts would need serious thermal protection just to step outside.
How long to walk around the Moon?
Walking the Moon’s full circumference would take about 547 days at 5 km/h for 4 hours daily.
The Moon’s equatorial circumference is roughly 10,921 km (6,786 miles). Walking speed drops in low gravity and bulky suits. Real-world obstacles like craters, sharp rocks, and temperature swings would slow you down even more. NASA’s Artemis program is building rovers and habitats to make long-term exploration easier than hoofing it.
Is Australia wider than the Moon?
Yes — Australia’s east-west width is about 600 kilometers wider than the Moon’s diameter.
Australia stretches roughly 3,984 km from Cape Byron to Steep Point, while the Moon is 3,474 km across. That makes Australia the only country wider than the Moon in straight-line distance. Teachers love this fact for debunking Moon size myths in class.
Which is bigger, Australia or the Moon?
By surface area, the Moon is about five times larger than Australia.
Australia covers 7.69 million km² of land, while the Moon’s total surface area is 37.9 million km². They’re close in width, but the Moon’s round shape gives it way more surface. Space agencies use this comparison to plan lunar missions and habitats. It puts the Moon’s scale into perspective.
How does the Moon compare to countries in size?
The Moon’s surface area is roughly equal to the combined area of the U.S., Canada, and Russia.
Even though the Moon’s diameter is smaller than the U.S., its spherical shape gives it far more surface area. The Moon’s 37.9 million km² could fit every European country plus India, China, and Brazil with room to spare. That scale matters for mapping and exploring the Moon. It also shows why rovers need to be super efficient with power and movement.
