The name given is the English version, with the native language version below. The acronym given is the most common acronym: this can either be the acronym of the English version (e.g. JAXA), or the acronym in the native language. Where there are multiple acronyms in common use, the English one is given first.
The date of the founding of the space agency is the date of first operations where possible. If the space agency is no longer running, then the date when it was terminated (i.e. the last day of operations) is given. A link to the Agency's primary website is also given.
The budgets listed are the official budgets from the different space agencies' homepages. Note that the Chinese budget of $500 million is from official figures by Luo Ge, vice administrator of the China National Space Administration. The budget is not normalized to the expenses of space research in each country/region, i.e. higher budget does not mean more activity or better performance in space exploration.
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