3. Specify settings, and then save the file. In the Save As dialog box, click Settings. Select Retain Flowing Text or Retain Page Layout, depending on your priority. You can select options to include comments, images, run OCR (optical character recognition), and specify the language setting for OCR.ave PDF files as Word documents You can save a PDF file as a Word document, even if the file was originally created in a different application.
Nicoluas Copernicus was the first astronomer to propose the heliocentric theory. The heliocentric theory was first proposed by the Greek astronomer and mathematician Aristarc â¦ hus of Samos, in the 3rd century, BCE. The first predictive heliocentric mathematical model of the motion of the planets was developed by Nicholas Copernicus. 12 people found this useful.
The heliocentric theory that he published in 1543 marked the first time that astronomers widely considered the possibility that the Sun was the center of the Solar System instead of the Earth. While no one knows who first discovered Mars, we do know who made many of the discoveries about the planet. It is known that Tycho Brahe, a Danish astronomer made accurate calculations of the position of Mars as early as 1576.