Jupiter shows its Galilean Moon’s, and on ideal conditions and with a premium eyepiece, its stripes, and The Great Red Spot.
Saturn appears a bright disk, and its Rings are distinguishable from the planet. Titan and Cassini Division are challenging to observe even in ideal conditions and premium eyepieces.
Mars appears as a bright red disk.
Venus appears as a small yellow disk. Its phases are observable.
Neptune, Uranus, Mercury, and Pluto are impossible to observe.
The Moon is the best target to observe with a long refractor. Due to the long optical tube, there is little color inaccuracy. Countless mountain ranges and craters reveal themselves. It will surely impress you if you are a first-timer.