It is in some other languages!

In Spanish it is. Except that we call the earth Tierra. We added an I in terra.

I believe those words and spellings are Latin, on which Spanish (and French, Portuguese, Italian, and Romanian) is based.

They are all Latin words. They are derived from Sol - Sun. Luna - Moon. and Terra. There is a saying Terra Firma, meaning solid ground/Earth.

1) these are their names in Latin 2) Latin was for a very long time the most used scientific language in Europe, and most planets became in many european languages a Latin based name. 3) However, the three most common astronomical objects made an exception. They kept the usual name that they had in the respective language. - For the Romance languages (such as Italian, French, Spanish, Portuguese), there is mostly also a Latin based name. - But for the Germanic languages (such as German and English), a Germanic based name ist mostly used. Sun / Sonne (not Sol) Moon / Mond (not Luna) Earth / Erde (not Terra) 4) Here are lists with the names of the common objects of the solar system: "Planetary Linguistics": http://www.gly.bris.ac.uk/www/teach/virtrips/nineplanets/days.html "Solar System (sorted by language family)": http://www.geonames.de/planets.html 5) Further information: About languages: http://en.wikipedia.org/wiki/Indo-European_languages http://en.wikipedia.org/wiki/Romance_languages http://en.wikipedia.org/wiki/Germanic_languages About planets names: http://en.wikipedia.org/wiki/Astronomical_naming_conventions#Names_of_planets http://paganastronomy.net/deities.htm

because you humans are nitwits, so you take a good latin name and convert it to other languages.

I goes time goes by and as people mix, so do language. Interesting but in time we will return to thinking and speaking in picture form.

it is if its in spanish