UD5 Toolkit
Moon Phase & Illumination – Online Exact Percent Tonight
Shows today's moon phase, age, and percent illuminated. Simple visual display. Works offline.
Nature & Outdoor Tools
6+ toolsReal‑Time Sky Map – Online Interactive Tonight's Stars
Use browser compass and geolocation to show which planets and stars are overhead. Minimal, local only.
Simple Tide Predictor – Online Approx High/Low Times
Enter a reference port's high tide and see estimated tides for the next 3 days using rule of twelfths. Educational.
Constellation Finder – Online Interactive Planisphere by Month
Select month and hour to see a simple star map with major constellations labeled. Educational astronomy fun.
Backyard Bird Identifier – Online by Color & Size
Answer simple questions (color, size, beak shape) to narrow down common North American backyard birds. No photo needed.
Meteor Shower Calendar – Online Upcoming Peak Dates
List of major annual meteor showers with next peak date and moon phase prediction. Stargazing planner.