The GAIA spacecraft is capable of measuring parallax angles as small as about 0.00002 arcsecond (20 microarcseconds). Based on this fact, GAIA should in principle be able to measure the distances of stars located .

GAIA should in principle be able to measure the distances of stars located all through the Milky Way Galaxy and outside it up to 50k/s

Explanation:

Gaia should be able to measure distance of stars located all across the Milky Way Galaxy, but not in more distant galaxies. Like The Andromeda galaxy.

Throughout the Milky Way galaxy with diameter of about 100,000 light-years, but not to stars in the Andromeda galaxy with distance of 2.5 million light-years or more.

ń, wǒ shuō yīngyǔ, dàn wǒ huì shuō qítā yǔyán, rú xībānyá yǔ fǎyǔ yìdàlì yǔ hé pǔtōnghuà, suǒyǐ bùyào pànduàn, dànshì