Describe the planet of uriel that the children have entered

When Calvin asks where they are now, the women tell him that they are on “Uriel, the third planet of the star Malak in the spiral nebula Messier 101.” They gaze at the new world around them and are amazed by its beauty. They fly over a garden “more beautiful than anything in a dream” that is filled with creatures like the one Mrs. Whatsit had become. They are singing, but not from their throats - rather from their wings. Though Meg cannot understand the music, Mrs. Whatsit implores Charles Wallace to translate it. On Charles Wallace’s face, Meg can see the look of someone trying to wrap their minds around a great puzzle. Mrs. Whatsit soon translates it, and the words begin with “Sing unto the Lord a new song, and his praise from the end of the earth, ye that go down to the sea, and all that is therein....” Meg feels a “pulse of joy” at these words, though Mrs. Whatsit sighs with a “whisper of doubt.”