2 ms·
This is a good place to mention https://en.wikipedia.org/wiki/Hipparcos https://en.wikipedia.org/wiki/Hipparcos and https://en.wikipedia.org/wiki/Gaia_(spacecra
by rimliu 9y ago
This is a good place to mention https://en.wikipedia.org/wiki/Hipparcos https://en.wikipedia.org/wiki/Hipparcos and https://en.wikipedia.org/wiki/Gaia_(spacecraft) https://en.wikipedia.org/wiki/Gaia_(spacecraft)
Had I not drop out from my PhD studies my thesis would be about photometric system for GAIA :(