Links to Astronomical Web Tools
- collected by Dr. Chip Kobulnicky

  • HST STIS Exposure time calculator at STSCI.
  • Flux Unit Conversion Tool at STSCI (NICMOS).
  • Absorption Law Calculator (by Doug Welch, McMaster U).
  • Julian Date Conversion (by Doug Welch, McMaster U).
  • Date conversion from Goddard Space Flight Center
  • An interesting extra-solar planet gizmo (by John Bray).
  • Compute Cosmological effects as a function of redshift (by Chip Kobulnicky)
  • Coordinate Conversions from Goddard Space Flight Center
  • Viewing Availability for Satellite Observatories from Goddard Space Flight Center
  • X-ray Exposure Time Estimator from Goddard Space Flight Center

    • Other web-based tools

  • A nice online periodic table of the elements (by Tim Helvey).