Eight minutes and twenty seconds: Cosmoknowledge's sunset short takes off
The space channel posted fourteen times, from a Crew-13 launch to colliding galaxies, and the one about old sunlight drew the crowd.
CosmoknowledgeStory of Why this story? The channel's weekly summary: what went up this week, what is drawing views now, and where the channel stands among similar channels.
Sunset is an illusion It takes about 8 minutes and 20 seconds for sunlight to travel to Earth.
On an ordinary day, Cosmoknowledge draws somewhere around 240,000 views. Right now it is running at roughly two and a half times that, and most of the lift traces back to one short idea: the Sun you watch slipping below the horizon is the Sun as it was a little over eight minutes earlier, because that is how long its light takes to reach us.
"Sunset is an illusion" went up on Tuesday with a modest first day, then kept climbing and has passed 370,000 views. Its comment section has turned into an informal physics seminar. Several viewers object that the animation makes the Sun look as if it moves at light speed. Others push the idea further: if everything we see is light that already traveled, then your own hand, the Moon and a flash of lightning are all slightly in the past. One viewer adds that atmospheric refraction means the Sun is often already below the horizon when it seems to touch it, and another hears Soundgarden's "Black Hole Sun" in the whole thing.
The rest of the fourteen uploads stayed true to the channel's habit of packing a single fact into a title. Crew-13, which the channel says launched on October 1 with four astronauts bound for the International Space Station, drew a quick crowd. A two-day-old short explaining why stars almost never hit each other when galaxies merge is moving nearly as fast. A video on why the Moon rotates even though it always shows us the same face had a solid first day and has since gone quiet.
Among the science channels close to its size, Cosmoknowledge sits in the middle by subscribers, at 823,000. Reactions and ABC Science are both running warmer than usual, while Konstantin, usually far busier than anyone in the group, is having a calmer stretch, and that leaves the space channel near the top for daily views.
Published on Trari
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What viewers say
We're never getting out of the past 😌
@reverence-x2jSee it on YouTubeAh! So this is what Soundgarden was singing about in Black Hole Sun.
@michaelmcleary8566See it on YouTubewait until you factor in the Earth's mass and the refraction in the atmosphere - when you see the Sun touch the horizon, in reality the Sun is already partially or fully below it.
@raverdeath100See it on YouTube
Public comments from the video's page on YouTube
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The videos drawing views on Cosmoknowledge right now
SpaceX's Crew-13 launched Oct 1, 2026, sending 4 astronauts to the IS…165,156 views · 2026-10-02
When galaxies collide, stars rarely do. Here's why.102,071 views · 2026-10-03
Seeing the same side of the Moon doesn’t mean the Moon doesn’t rotate.84,374 views · 2026-10-01
Planets move faster when they are closer to the Sun.41,908 views · 2026-10-03
The speed limit of light applies only to objects moving through space…37,338 views · 2026-09-29
- Channel
- Cosmoknowledge
- Subscribers
- 823,000
- Videos published this week
- 14
- Video published
- September 30, 2026
- Video views so far
- 377,625
- Views on its first day
- 48,782
The numbers
Here are the week's figures for Cosmoknowledge and the science channels around it.
💡 Test your knowledge
When the Milky Way and the Andromeda galaxy merge in a few billion years, what nickname have astronomers given the combined galaxy?
Astronomers coined "Milkomeda" by blending the two galaxies' names for the elliptical galaxy expected to form from their merger.
