5 ms·
So this tells us that the diameter of the moon is roughly one Australia, East to West. Alternatively, if we simplify Australia to a circle, then the moon's rad
by kirke 7y ago
So this tells us that the diameter of the moon is roughly one Australia, East to West.
Alternatively, if we simplify Australia to a circle, then the moon's radius is equal to Australia's radius.
Therefore, since the (surface) area of a circle is πr^2 and the surface area of a sphere is 4πr^2, the moon has roughly four times the surface area of Australia.
- peter_retief 7y agoThanks I was wondering about the way it was represented, so the surface area of the moon is 4x that of Australia, that's pretty big. Large enough for a human colony for sure.
- chris_wot 7y agoTerra lunas?
- onlyrealcuzzo 7y agoConsidering that the Earth is mostly water, 4x the land area of Australia, is probably a decent portion of all land area on Earth.
- incompatible 7y agoI doubt it. Well, I can look it up. Land area of Australia: 7,692,024 sq km. Land area of earth: 148,940,000 sq km. OK, it depends on whether you consider 20.66% a decent proportion or not. Further: surface area of the moon: 37,930,000 sq km, or 25.47% or the land area of Earth.
- symplee 7y agoGot me curious enough to look this up: Total surface area of Earth is ~500,000,000 km^2 Total land area of Earth is ~150,000,000 km^2 (~.29 Earth) Australia's land area is ~7,500,000 km^2 (~.015 Earth, 5% of land area) Moon surface area is ~38,000,000 km^2 (~0.074 Earth, 25% of land area)
- symplee 7y agoMeta reply, I think we all just fell victim to Cunningham's Law [0] "The best way to get the right answer on the internet is not to ask a question; it's to post the wrong answer." https://meta.m.wikimedia.org/wiki/Cunningham%27s_Law https://meta.m.wikimedia.org/wiki/Cunningham%27s_Law
- msuvakov 7y agoMore precisely a quarter: 38 million km2 (Moon area) : 150 million km2 (land area of the Earth) = 25%
- OnlineCourage 7y agoI think you mean Australias diameter is roughly equal to Moons radius. Which is wrong by 10%, Simple Australias radius = 0.4(Moon Radius). Remember maps have projections and Australia is uneven. Unless you are counting part of the ocean as Australia.