In the Sector Map it seems Planets are replaced with (their) Orbits (e.g. Kanha Orbit). So after clicking on a planet/orbit you cant select Planet Info. You can however get to the Planet Info via the Sector List.
You have to go through the sector list to access planet info, otherwise the only thing you can select is the orbital playfield. It's very inconvenient.
Please recheck on the current exp release B2717 https://empyriononline.com/threads/alpha-11-1-patch.91347/
Sector Map is back to its old layout/display in exp 2717. Planets are shown again instead of their Orbits and you can select Planet Info from them.