3Blue1Brown

Measuring the speed of light using Jupiter's moons

Published 7 Apr 2025 · 33 daily observations recorded · last updated 2026-09-29

Views
2,316,740
Avg views / hour
178.9
since publish (lifetime average)
Recent velocity
2.3
+56 views over 24h (2026-09-28 → 2026-09-29)
vs channel baseline
—
Channel median
—

Recent growth

Last 7 days
+364 views
measured 2026-09-22 → 2026-09-29 (168h)
Last 30 days
+1,361 views
measured 2026-08-30 → 2026-09-29 (720h)

Performance history

Every observation TubeSum recorded, plotted as measured.

Views over time — 33 observed points, 2.3M to 2.3M views 0 811K 1.6M 2.4M Aug 8, 2026 · 2,314,334 views Aug 10, 2026 · 2,314,396 views Aug 17, 2026 · 2,314,690 views Aug 18, 2026 · 2,314,762 views Aug 27, 2026 · 2,315,272 views Aug 29, 2026 · 2,315,346 views Aug 30, 2026 · 2,315,379 views Aug 31, 2026 · 2,315,420 views Sep 1, 2026 · 2,315,459 views Sep 4, 2026 · 2,315,586 views Sep 6, 2026 · 2,315,655 views Sep 7, 2026 · 2,315,699 views Sep 8, 2026 · 2,315,733 views Sep 9, 2026 · 2,315,772 views Sep 11, 2026 · 2,315,856 views Sep 12, 2026 · 2,315,887 views Sep 13, 2026 · 2,315,927 views Sep 14, 2026 · 2,315,982 views Sep 15, 2026 · 2,316,025 views Sep 16, 2026 · 2,316,062 views Sep 17, 2026 · 2,316,098 views Sep 18, 2026 · 2,316,164 views Sep 19, 2026 · 2,316,221 views Sep 20, 2026 · 2,316,287 views Sep 21, 2026 · 2,316,339 views Sep 22, 2026 · 2,316,376 views Sep 23, 2026 · 2,316,423 views Sep 24, 2026 · 2,316,480 views Sep 25, 2026 · 2,316,527 views Sep 26, 2026 · 2,316,581 views Sep 27, 2026 · 2,316,647 views Sep 28, 2026 · 2,316,684 views Sep 29, 2026 · 2,316,740 views Aug 8 Sep 13 Sep 29

Based on 33 observations · last observed Sep 29, 2026 · straight lines connect consecutive observations — TubeSum does not measure the days between them.

All observations

The same points the chart plots, as exact numbers. Gaps mean no observation was taken that day.

Date Views Avg views / hour Channel median
2026-09-29 2,316,740 178.9 —
2026-09-28 2,316,684 179.2 —
2026-09-27 2,316,647 179.6 —
2026-09-26 2,316,581 179.9 —
2026-09-25 2,316,527 180.2 —
2026-09-24 2,316,480 180.6 —
2026-09-23 2,316,423 180.9 —
2026-09-22 2,316,376 181.2 —
2026-09-21 2,316,339 181.5 —
2026-09-20 2,316,287 181.9 —
2026-09-19 2,316,221 182.2 —
2026-09-18 2,316,164 182.6 —
2026-09-17 2,316,098 182.9 —
2026-09-16 2,316,062 183.3 —
2026-09-15 2,316,025 183.6 —
2026-09-14 2,315,982 184.0 —
2026-09-13 2,315,927 184.3 —
2026-09-12 2,315,887 184.6 —
2026-09-11 2,315,856 185.0 —
2026-09-09 2,315,772 185.7 —
2026-09-08 2,315,733 186.1 —
2026-09-07 2,315,699 186.4 —
2026-09-06 2,315,655 186.8 —
2026-09-04 2,315,586 187.5 —
2026-09-01 2,315,459 188.5 —
2026-08-31 2,315,420 189.0 —
2026-08-30 2,315,379 189.3 —
2026-08-29 2,315,346 189.7 —
2026-08-27 2,315,272 190.4 —
2026-08-18 2,314,762 193.7 —
2026-08-17 2,314,690 194.2 —
2026-08-10 2,314,396 197.0 —
2026-08-08 2,314,334 197.6 —

Content analysis

Transcript, chapters and structure for this video live on its analysis page — performance and content are separate documents on TubeSum.

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