Complex sentence: It was immediately recognized as a barred spiral galaxy lying at the distance of about 3 Mpc from the Milky Way having the radial velocity of about +110 km/s. The total mass of the neutral hydrogen in Dwingeloo 1 was estimated at 450 million Solar masses.
Split into simpler sentences: It was immediately recognized as a barred spiral galaxy lying at the distance of aboutn 3 Mpc from the Milky Way. Observations showed that it had the radial velocity of about +110 km/s. The total mass of the neutral hydrogen was estimated at 450 million Solar masses.