sentences:  "Njóla" is a long didactic theological-philosophical poem Björn wrote mostly during his survey travels when the weather did not permit to work or in the evenings.It was published originally in the annual report of 1842 of the Bessastaðir school, and then in 1853 with some minor revisions and again in 1884 in Reykjavík.The poem begins by describing a night view of the skies, and then introduces the reader to astronomic distances, explaining how long a cannonball shot from the sun would take to reach each of the planets—and then the next star.