When choosing a telescope to observe planets, look for one with high optical quality, good aperture size, and stability. A refractor telescope with an aperture of at least 70 mm (2.8 inches) or a reflector telescope with an aperture of at least 100 mm (4 inches) is recommended for clear views of planetary details. Instruments like the Celestron AstroMaster 70AZ or the Orion SkyQuest XT4.5 are popular choices. Ensure the telescope includes a stable mount, such as an altazimuth or an equatorial mount, for better tracking and less vibration. Also, various eyepieces will enhance magnification flexibility to adapt to different viewing conditions and targets like Jupiter’s bands, Saturn’s rings, or Mars’ surface detail. A Barlow lens can further extend magnification power. Keep in mind that good atmospheric conditions and low light pollution will greatly enhance your viewing experience.