Brightest of all the planets, but total cloud cover makes Venus an almost featureless disc. Again there are phases. The most detailed of all the planets - two main belts plus many thinner ones, polar regions and, of course, the Great Red Spot, as well as other atmospheric phenomena. The famous rings are currently tipped wide open. Much smaller and fainter than the other planets, with no surface detail to be seen.
Open clusters are loose collections of stars which formed together.
Globular clusters are tight, spherical collections of very old stars, which form a halo around our galaxy. Emission nebulae are clouds of dust heated by nearby stars. Supernova remnants are expanding clouds caused by the explosion of a star - even the Crab Nebula is difficult. The Virgo Cluster - many galaxies seen by sweeping with a large telescope. M5 - a bright globular cluster in Serpens Caput.