Geocentric model coelestium" ("On the Revolutions of the Heavenly Spheres"), which posited that the Earth and the other planets instead revolved around the Sun. The geocentric system was still held for many years afterwards, as at the time the Copernican system did not offer better predictions than the geocentric system, and it posed problems for both natural philosophy and scripture. The Copernican system was no more accurate than Ptolemy's system, because it still used circular orbits. This was not altered until Johannes Kepler postulated that they were elliptical (Kepler's first law of planetary motion). With the invention of the telescope in 1609,
What the....You Mean I Can't Sing?! a trio of experimental albums, "Brer Soul", "Ain't Supposed to Die a Natural Death" and "As Serious as a Heart-Attack", which were considered to be spoken word at the time, due to their use of sprechgesang. Modern critics have since dubbed these albums as precursors to hip hop music. Van Peebles wanted to record an album that showed that he could perform in a more traditional form, as opposed to the style he had used on his previous albums, titling it "What the...You Mean I Can't Sing?!" because of this. "What the...You Mean I Can't Sing?!" places more emphasis on