User Manual for ACE Desktop (by Section) ACE Introduction Basic Operation Interactive Command Reference Appendix Other Tools and Resources Hourly Air mass calculator Signal-to-Nose calculator for CCD Photometry Moon Phases 10 day Forecast from Weather.com 10 day Forecast from Weatherunderground.com SIMBAD Astronomical Database AAVSO: Variable Star Plotter (VSP) Heliocentric Julian Date Converter Times of Minima Table Astronomy Resources Hands On Universe Scott’s Astronomy Page Heavens Above Space Weather Astronomy Picture of the Day Universe Today Clearsky Chart for Tarleton