This ad appeared in the Fall 1990 issue of Sierra News Magazine.
EZCosmos is a DOS program developed by Future Trends Software and there were at least three version. Eventually it was acquired by a company called Software Bisque and incorporated into an astronomy program called TheSky for Windows.
From the ad:
"Journey through space and time, exploring the vistas of the universe. EZCosmos reveals the entire celestial sphere for any date, time and location from 4000 B.C. to A.D. 10000. You can choose your location from one of 560 cities around the world, or you can input your own lat/lon to see the sky from anywhere on Earth.
Explore the vastness of the universe. EZCosmos displays more than 10000 celestial objects, including the sun, moon, planets, stars, constellation lines and deep space objects. Use the arrow keys or your mouse to position the box cursor on any object, or find the object and its location simply by typing in its name.
Discover the wonders of the universe. Zoom in on binary stars. Verify historical observations. Watch solar eclipse animations. Restrict the skyplot do display just the navigational stars. EZCosmos is informative, educational, useful and fun."
Read more: https://www.megalextoria.com/wordpress/index.php/2018/01/18/ezcosmos/