Сегодня родился Орлов Александр Яковлевич
On April 6, 1880 in Smolensk Orlov Alexander Yakovlevich was born. This is a Soviet astronomer, one of the creators of geodynamics. After the termination of physical and mathematical faculty of the St. Petersburg university, he worked in Pulkovo Observatory. He listened to lectures at Sorbonna university and trained in Germany and Sweden. He went in for theoretical astronomy, seismometry, gravimetry and magnetometry.