While the planetary nebula NGC 1501 is a popular amateur astronomy target, the newly formed, hot, pulsating white dwarf at its center is much more interesting to professional astronomers.

As the second closest spiral galaxy to the Milky Way, Messier 33 has been a very popular observing target for both amateur and professional astronomers, and even I have made images of the galaxy.

The white dwarf GD 394 seems to have an abnormal amount of heavy elements in its outer atmosphere and also varies in brightness with a period of 1.146 days, and no one understands why.

The Norma Cluster lies near the center of a giant supercluster of galaxies that is pulling in everything else in the local universe, including our galaxy.

The classical nova RR Pictoris was one of the brightest and closest to ever appear in the sky.

The spiral galaxy Markarian 766 contains an active galactic nucleus with a supermassive black hole, which means that everyone needs to apply their favorite technique to measure the black hole's mass.

The Kepler-138 star system contains at least four exoplanets, one of which may be a "water world" covered in a very deep ocean.

The protostellar object PDS 70 has a very complicated protoplanetary system that includes a disk of gas and dust and two protoexoplanets.

The Red Rectangle (yes, the Red Rectangle) is a uniquely weird protoplanetary nebula formed by a uniquely weird binary star system.

While some astronomers are interested the globular cluster NGC 6712 because it appears to have been severely tidally disrupted by orbiting too close to the center of the Milky Way, other astronomers are interested in the cluster because it contains a couple of weird yet similar binary star systems.