galactic nuclei

What Causes This Disk To Form And Flatten?

by

What Causes This Disk To Form And Flatten? Because they are born out of the disk, the planets will orbit the star in the plane of the disk, unless collisions skew their orbits, or the planets are ejected out of the star’s planetary system How protoplanetary is formed? Protoplanetary disks are formed almost immediately after

What Evidence Supports The Existence Of A Very Massive Black Hole At The Center Of Our Galaxy?

by

What Evidence Supports The Existence Of A Very Massive Black Hole At The Center Of Our Galaxy? What evidence supports the existence of a black hole at the center of our galaxy? The motions of the gas and stars at the center indicate that it contains 4 million solar masses within a region only 3