Celestron NexStar 127 SLT easily gathers detail from Jupiter. Galilean moon’s, The Great Red Spot and the storm clouds are colourful and clear.
Saturn shows its rings with the Cassini Division in the middle. On a good night, you can get images of its moons.
Mars will show some surface detail, but it is a relatively harder target.
Phases of Venus are observable, and the planet itself looks like a bright, yellow disk.
The remaining planets, Uranus, Neptune and Mercury, are hard to observe with any telescope. They look like colourful tiny dots with Celestron NexStar 127.
The Lunar surface shows a mesmerizing amount of craters and mountain ranges. Both Lunar photography and observations are superb with this telescope.