var fDesc=new Array(); fDesc[0] = "Nightshade is simulation and visualization software for teaching and exploring astronomy, Earth science, and related topics.

Nightshade NG (Next Generation) is a complete rewrite from the ground up. It throws out the limitations Nightshade Legacy inherited from older projects in favor of advanced features supported by cutting-edge simulation techniques.

Nightshade NG is currently in use on Digitarium digital planetarium systems, which are used around the world to teach astronomy and related topics."; function tShowHide(id, show) { var s = document.getElementById("desc"); if ((s.innerHTML.length<=212 || show==1) && show!=2) { s.innerHTML = fDesc[id]; if (document.getElementById('m1')) document.getElementById('m1').style.display='none'; if (document.getElementById('m2')) document.getElementById('m2').style.display='none'; if (document.getElementById('more_txt')) document.getElementById('more_txt').style.display='inline'; } else { s.innerHTML = ''; } }