Space & Satellite Center
Track an orbit, plan a pass, and explore a little farther.
Satellite pass planner
Predict when the ISS or Tiangong rises above your horizon. Calculations use CelesTrak orbital elements and the SGP4 model, locally in your browser.
Defaults to central Tulsa. Coordinates stay in this tab and are not saved. Location access happens only if you press the location button.
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Geometric passes, not guaranteed naked-eye sightings. The station must be sunlit, your sky dark enough, and weather clear. Times are approximate (30-second sampling), rounded to the minute. Passes below 10° maximum elevation are omitted. Orbital data older than 7 days is rejected.
Moon desk
—Approximate phase from a mean lunar cycle, not an observing ephemeris. Phase is the same worldwide; apparent orientation varies.
Explore the Moon at NASA →Explore farther
NASA image explorer
A rotating selection from the NASA Image and Video Library. Open an image’s source page for its full description, credit, and usage information.
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Data & attribution
- CelesTrak — orbital elements, refreshed by the site’s scheduled task.
- NASA Image and Video Library — imagery and item credits. Images are not an endorsement of this site.
- Satellite.js 6.0.1 — MIT-licensed SGP4 implementation.
- Natural Earth — public-domain land outlines.
Saved data remains available during source outages. Observation and element timestamps help distinguish current data from older snapshots.