About this app
View the arc of the sun as it moves throughout the day over the Smithsonian Castle. See how the arc of the sun changes in two separate seasons: Winter and Spring. Look around the National Mall in full 360°. How does the Sun's position in the sky change? Use the Sun Data Sheet to record your observations.
Latest release
What’s New
Minor text tweaks
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 25, 2026 · 9:04 PM Free
Screenshots
