Bertil Lindblad (26 November 1895 – 25 June 1965) was a Swedish astronomer.
[1][2][3] After finishing his secondary education at Örebro högre allmänna läroverk, Lindblad matriculated at Uppsala University in 1914.
From 1927 he was professor and astronomer of the Royal Swedish Academy of Sciences and head of the Stockholm Observatory.
By making careful observations of the apparent motions of stars, he was able to study the rotation of the Milky Way.
He deduced that the rate of rotation of the stars in the outer part of the galaxy, where the Sun is located, decreased with distance from the galactic core.