Space is the easiest niche to make look beautiful and the easiest to get wrong. Stock footage of galaxies, rockets and planets is everywhere, so what separates a good channel is precision. The audience includes a lot of people who know their astronomy, and they will tell you (loudly) when a number is off.
Every idea below uses figures you can confirm on NASA or ESA pages. Where science has changed its mind recently, like the odds of the Milky Way hitting Andromeda, the hook is built around the update. That 'what we thought vs what we now know' angle is one of the best in the niche.
Updated 29 September 2026 · by Danish, who makes TallyReel
Each one is written as the first line of the video. Copy it, or press Make this and paste it into TallyReel.
Planets
A day on Venus is longer than its yearOne rotation takes about 243 Earth days; one orbit about 225.Make this
On Venus, the Sun rises in the westVenus spins backwards compared with most planets.Make this
Venus is hotter than Mercury, even though Mercury is closer to the SunAround 465 degrees Celsius at the surface, thanks to its thick atmosphere.Make this
Saturn is less dense than waterAverage density about 0.69 grams per cubic centimeter. Skip the 'it would float' cliche or caveat it.Make this
Uranus spins on its sideIts axis is tilted about 98 degrees.Make this
Olympus Mons on Mars is about two and a half times the height of EverestRoughly 22 km high.Make this
Sunsets on Mars are blueFine dust scatters blue light near the Sun's direction.Make this
Pluto hasn't finished a single orbit since we discovered it in 1930Its year is about 248 Earth years.Make this
Neptune finished its first orbit since discovery in 2011Discovered 1846, one orbit takes about 165 years.Make this
Jupiter's Great Red Spot is bigger than Earth, and it's shrinkingMake this
Moons
The Moon is drifting away from Earth by about 3.8 centimeters a yearMeasured by bouncing lasers off Apollo reflectors.Make this
Europa may hold about twice as much water as all of Earth's oceansMake this
Titan has rain, rivers and lakes, but they're made of methaneMake this
Mars's moon Phobos is slowly falling toward the planetExpected to break apart in tens of millions of years.Make this
Astronaut footprints on the Moon could last for millions of yearsNo wind or rain. Micrometeorites erode them very slowly.Make this
Moon dust smells like spent gunpowder, according to Apollo astronautsMake this
Missions
Voyager 1 will soon be one full light-day from EarthOn November 18, 2026, per NASA. Timely hook for this autumn.Make this
Voyager 1 talks to Earth with a transmitter about as strong as a fridge bulbRoughly 23 watts.Make this
The Apollo guidance computer had about 4 kilobytes of working memoryMake this
The Pale Blue Dot photo was taken from about 6 billion kilometers awayFebruary 14, 1990, by Voyager 1.Make this
The James Webb telescope sits about 1.5 million kilometers from EarthAt the L2 point, roughly four times farther than the Moon.Make this
Astronauts on the ISS see about 16 sunrises a dayThe station orbits roughly every 90 minutes.Make this
Astronauts can grow up to 3 percent taller in spaceTheir spines stretch without gravity. It reverses back on Earth.Make this
Hubble stared at a tiny empty patch of sky and found about 3,000 galaxiesThe Hubble Deep Field, 1995.Make this
Stars
A teaspoon of neutron star would weigh around a billion tonnes on EarthMake this
The Sun holds about 99.8 percent of all the mass in the solar systemMake this
About 1.3 million Earths could fit inside the SunMake this
Sunlight takes about 8 minutes and 20 seconds to reach youSo you always see the Sun as it was a few minutes ago.Make this
Betelgeuse dimmed dramatically in 2019. It wasn't about to explode.Astronomers traced it to a dust cloud the star ejected.Make this
Some stars you see at night may no longer exist. Most probably still do.Good nuance hook. Most naked-eye stars are relatively nearby.Make this
The big picture
The Milky Way and Andromeda might not collide after allA 2025 Nature Astronomy study put it at roughly 50/50 within 10 billion years.Make this
The universe is about 13.8 billion years oldMake this
The observable universe is about 93 billion light-years across. That's not a typo.Space itself expanded while light traveled.Make this
The solar system takes about 230 million years to orbit the galaxyMake this
Right now you're moving around the Sun at about 107,000 kilometers per hourMake this
Space officially starts about 100 kilometers above your headThe Karman line, as used by the FAI. The US uses about 80 km for astronaut wings.Make this
Space isn't cold the way you think. It depends where you are.Make this
There's no sound in space, but there are sound waves in gas cloudsMake this
Scientists think it may rain diamonds deep inside Uranus and NeptuneSupported by lab experiments. Say 'scientists think'.Make this
Tens of thousands of pieces of tracked junk are orbiting Earth right nowMake this
Scripts you can copy
About 30 seconds each when read aloud. Paste one into TallyReel as your own script, or change the details first.
The script behind the video above
One Light-Day From Home
1
This November, a spacecraft from 1977 will be one full light-day from Earth.
2
Voyager 1 launched in September 1977. It has been flying away from us ever since.
3
On November 18th, 2026, NASA expects it to reach about 25.9 billion kilometers away.
4
At that distance, a radio signal traveling at the speed of light takes a full day to get there.
5
Send a command on Monday morning, and the reply arrives Wednesday morning.
6
It's the first human-made object ever to get that far. And it's still talking to us.
Script 2
A Day Longer Than a Year
1
On Venus, a single day lasts longer than a whole year.
2
Venus takes about 243 Earth days to spin once on its axis.
3
But it circles the Sun in only about 225 days.
4
It also spins backwards compared with Earth, so the Sun rises in the west.
5
And you wouldn't want to watch it. The surface is around 465 degrees Celsius, hotter than Mercury.
6
The air pressure is about 90 times Earth's, like being deep under the ocean.
How often to post space facts
One short a day works for most space channels, because each fact is compact and the footage is easy to source. Keep a list of upcoming events (launches, eclipses, meteor showers, milestones like Voyager 1's light-day) and plan videos a few days ahead of each. Timely space shorts often get a second life when the event happens.
Mix big-number facts with 'myth vs reality' videos and short explainers. A channel that only posts 'this planet is huge' facts tends to plateau.
How long space shorts should be
Epic music and slow narration fit this niche, but don't let pacing drag. Every scene should add a new number or image.
YouTube Shorts: up to 3 minutes allowed. One fact fits in 20 to 40 seconds; an explainer can run 60 to 90.
Instagram Reels: up to 3 minutes, but the visual-first audience rewards 15 to 35 seconds. Let the footage breathe.
TikTok: long uploads allowed. Creator Rewards only pays on videos over 1 minute, so combine three related facts into one longer cut.
How space channels earn
Science and education content is generally advertiser-friendly, and space audiences skew toward curious adults, which helps long-form rates. Shorts revenue from YouTube's shared pool is modest, often cents per thousand views and varying by country. To join the YouTube Partner Program you'll need 1,000 subscribers plus 4,000 public watch hours in 12 months, or 10 million Shorts views in 90 days.
Space channels that earn well usually pair Shorts with 8 to 15 minute explainers, and take sponsorships from telescope makers, learning platforms and apps. Numbers vary widely by channel and country.
What gets space channels flagged or ignored
Wrong numbers are the fastest way to lose an audience that knows the subject. Sensational claims ('NASA is hiding this', 'asteroid will hit Earth next month') can run into misleading content rules and destroy trust. Using clips from documentaries or other creators brings copyright claims, even though NASA's own imagery is generally free to use with credit. And mass-produced 'space fact #300' uploads with the same template can fall under YouTube's inauthentic content policy (renamed from 'repetitious content' in July 2025).
Making space shorts in TallyReel
Type a fact and TallyReel drafts a short script you can check against NASA or ESA before rendering. Pexels has plenty of starfield, rocket and Earth-from-orbit footage, and the epic music bed suits big-scale facts. Captions help here because numbers are easier to follow when people can read them.
Questions
Where can I check space facts before posting?
NASA and ESA mission pages are the most reliable. For recent research, look for the original paper or the university's press release.
Can I use NASA footage in my videos?
NASA imagery is generally not copyrighted and can be used with credit, but it can't imply NASA endorses you. Some images on NASA sites come from partners with different rules, so check each one.
When will Voyager 1 be one light-day from Earth?
NASA expects it on November 18, 2026, at roughly 25.9 billion kilometers away.
Is space a saturated niche?
The basic facts are heavily covered, but accurate, well-paced videos on recent discoveries and myth corrections still stand out.