"The universe is globe-shaped, either because that is the most perfect shape of all, needing no joint, an integral who…"

"We find then in this arrangement an admirable harmony of the world, and a dependable, harmonious interconnexion of th…"

"The Solar System consists of eight "planets" Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. A new …"

"The word planet comes from the Greek for “wanderer,” because the planets' positions change relative to those of the s…"

"But what exceeds all wonders, I have discovered four new planets and observed their proper and particular motions, di…"

"I therefore concluded, and decided unhesitatingly, that there are three stars in the heavens moving about Jupiter, as…"

"I had rather be Mercury, the smallest among seven [planets], revolving round the sun, than the first among five [moon…"

"The Pythagorean harmony of the spheres lives on to this day. In his Natural History (circa AD77), the Roman scientist…"

"To the ancient eye, without the use of spyglass, only seven of these ‘wanderers’ or ‘planets’ as they were known, cou…"

"I wol yow telle, as was me taught also, The foure spirites and the bodies sevene, By ordre, as ofte I herde my lord h…"