1. Selected UBVRI Photometric Standard Stars from Landolt 1992, AJ, 104, 340
   NOAO

2. Stetson Photometric Standard Fields
   http://cadcwww.hia.nrc.ca/standards/

3. Sloan Digital Sky Survey
   http://cas.sdss.org/dr14/

4. Fourmi Lab:Your Sky
   http://www.fourmilab.ch/yoursky/

5. RHO: Eclipsing Binary Ephemeris Generator
   http://www.rollinghillsobs.org

6. WEDBA: Cluster On-line Database
   webda

7. AAVSO: CCD Observing Program
   http://www.aavso.org

8. CDS (Centre de Donne'es astronomiques de Strasbourg)
   http://simbad.u-strasbg.fr/simbad/
   http://vizier.u-strasbg.fr/viz-bin/VizieR
   

9. Photometric Standard Stars
   http://plato.phy.ohiou.edu/~tss/ASTR410/standards.html

10. xephem Reference Manual
    http://www.clearskyinstitute.com/xephem/help/xephem.html

11. exoplanets at Swathmore

Where we are: Longitude: 94° 23.780' W, latitude: 45° 34.499' N, altitude: 1210 ft.