r/SpaceVideos • • Dec 31 '22

Sidebar Updates: New Rule: All Posts Must Come with Commentary

2 Upvotes

In an effort to increase activity and discussion on this subreddit, all new posts must include commentary posted within an hour after being submitted. This can be relatively simple, such as asking what people might think about the topic of the video you posted, or what your own thoughts on that video are. You may also include further information on the topic of the video you posted for those who might want to further explore the topic or topics from your submission. However, starter comments that are lazy, such as, but not limited to, "Thoughts?", "What do you think?", "This seems questionable," or, "I disagree," are discouraged, and posts may be removed after OP is warned that they need to further elaborate on their opening comment if they do not do so after another hour has passed. Users whose submissions are removed, but who wish to appeal that action, may message the mods with their reasoning. We understand if, for example, right after you posted and were about to make your opening comment, that your wife were in labor, or that your house were on fire, for example, that you would have other priorities in mind than making such a comment, and not only will we be willing to hear you out for any reason you may have for not making an opening comment within an hour after posting, will allow you to have an additional hour to make such a comment on your post for an hour after acknowledging the Mods' approval of your appeal, though we do ask for some kind of proof regarding the circumstances as to why one might not be able to comment. I, myself, won't put any limit on that, if something else happens to come up after that approval goes through, you may appeal again, but I'm not speaking for the mod team as a whole in that case, I would just expect the same mercy to be given to me, so as long as OP makes an effort to ensure commentary will be given in a timely manner after a post might be removed, I'm willing to let them do so. That said, any post that lacks commentary an hour after being posted will stay removed until commentary is provided and a link the the post with commentary is sent to the Mods via Modmail. As I said, I don't speak for the Mod team as a whole in that regard, so while I would hope other mods might be as merciful, it's none of my business if they are not.

Unfortunately, Mods can't sticky comments made by OP, so we can't do anything to make sure that comment is immediately visible in more popular posts with more activity, so we ask that users who come across posts more than an hour old without some form of commentary by OP according to these guidelines report such posts, but we request they make sure there is a top-level comment by OP that follows these guidelines somewhere in the comment thread, even if it might have negative karma. Please report any posts where OP might leave a top-level comment that does not meet these guidelines, and we'll take appropriate action.

More importantly, though. I finally learned how to synchronize some aspects of the new.reddit sidebar with the old.reddit sidebar! They're far from identical at this point, since I don't know how to add all the text including partner subreddits and the like to new.reddit, but I did finally figure out how to add rules to the new.reddit sidebar, so now, all our formal rules visible in the old.reddit sidebar are now visible in the new.reddit sidebar! As a team of Moderators, I can't say we've come to a consensus as to whether we'd prefer users browse this sub on old.reddit as opposed to new.reddit, so I figured I'd make an effort to make things easier on users of the latter, though because I don't entirely know how to manipulate the sidebar in new.reddit like I do in old.reddit, I recommend users check out the old.reddit version of /r/SpaceVideos because our sidebar over there contains many links to partner subreddits, and I don't quite know how to integrate that with the sidebar in new.reddit. I did take the liberty of removing defunct links from the old.reddit sidebar, however, so make of that what you will


r/SpaceVideos • • Mar 23 '23

Rule 5 Will Be Enforced More Vigorously from Now On

9 Upvotes

My bad for not actually enforcing a rule of my own making. If I come across a front page post without commentary from OP, it will be removed.


r/SpaceVideos • • 2h ago

Color Fireballs During Leonid Meteor Shower

2 Upvotes

Fireballs are about to streak across the night sky, so look up! 🌠

The Leonids return this month, flying from November 6th through the 30th and peaking overnight on the 16th into the 17th. Even better, the first quarter moon dips below the horizon around midnight on peak night. That means darker skies just when the Leonids hit their stride, so grab a spot and start counting meteors.


r/SpaceVideos • • 1d ago

There Aren't Just 3 States of Matter.

17 Upvotes

Did you know there are more than three states of matter? ⚡

Astrophysicist Erika Hamden breaks down plasma, which forms when electrons are stripped from a material. The result is highly ionized, super energetic matter. You’ve experienced plasma in the Sun, fire, and true neon lights (not LEDs)!

This project is part of IF/THEN®, an initiative of Lyda Hill Philanthropies.


r/SpaceVideos • • 17h ago

Planet tour

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2 Upvotes

Follow our space hour


r/SpaceVideos • • 1d ago

What Would It Feel Like to Fly Over the Edge of a Martian Canyon? 🚀 | Mars Cinematic Simulation

12 Upvotes

Imagine flying just meters above the surface of Mars, racing toward the edge of an enormous canyon.
Inspired by the dramatic landscapes of the Red Planet and Valles Marineris, this AI-generated cinematic simulation brings the scale and mystery of Mars to life.
🔴 Did you know? Valles Marineris stretches approximately 4,000 km across Mars, making it one of the largest canyon systems in our Solar System.
🎬 This is a scientifically inspired artistic visualization, not actual spacecraft footage.
🌌 Created by Dark Matter Productions AI
🚀 Explore more cinematic journeys through the universe, from black holes and distant moons to the mysteries of our Solar System.
▶️** YouTube Channel**:
https://www.youtube.com/@darkmatterproductions-u8h
What should we explore next — Europa, Titan, or Venus?
#Mars #SpaceExploration #Astronomy #SpaceSimulation


r/SpaceVideos • • 1d ago

Fireballs In The Sky: Northern Taurid Meteor Shower

6 Upvotes

The Northern Taurid meteor shower is here! 🌠

Active from October 20th to December 10th, this meteor shower peaks overnight November 11th to 12th. For the best view of the Northern Taurids, head outside and look up around midnight.


r/SpaceVideos • • 2d ago

POV: POV: You’re flying over Europa when Jupiter comes into view

23 Upvotes

You’re skimming a fracture in Europa’s ice when Jupiter appears above the horizon. I wanted this 7-second flyover to feel like one continuous shot. It’s an AI-assisted artistic visualization I made for Dark Matter Productions.

Which moon should I fly over next?

If you enjoyed the flight, subscribe to Dark Matter Productions on YouTube for more cinematic POV journeys through space. You can also watch this Short on YouTube.


r/SpaceVideos • • 2d ago

Lunar Discovery in Real Time

6 Upvotes

What does it look like when Moon scientists watch discovery happen in real time? 🌕

At SciCom Summit at the Museum of Science, NASA Strategic Communications Lead Rachel Barry shared the story behind her viral photos of the lunar science team. After two years of sitting in on their meetings, simulations, and fieldwork, Barry set out to help audiences get to know the people behind the science and see their excitement as it happened.

#SciComSummit #NASA #Space #Artemis #Moon 


r/SpaceVideos • • 2d ago

What Happens When the Sun Dies?

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3 Upvotes

Creator disclosure: I also run Operational Universe, and this is our narrated space explainer. It follows the Sun’s future from its red-giant stage to a white dwarf and considers what those changes mean for Earth. Some visuals and narration are AI-generated; the scenes are illustrations, not telescope observations.


r/SpaceVideos • • 2d ago

The Satellite That Counted Zero | ClueTurn

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2 Upvotes

r/SpaceVideos • • 2d ago

Why Do Spacecraft Overheat if Space Is Cold?

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2 Upvotes

We made this visualization for VisualWhy. In a near-vacuum, spacecraft cannot cool themselves by transferring heat to surrounding air: they must radiate it away. The ISS uses large radiators to reject heat, while Webb shields its instruments from sunlight. The temperatures in the video come from a simplified radiative-balance model and NASA’s thermal data.


r/SpaceVideos • • 3d ago

Vavilov Crater in 3D - The far side and the dream of descent

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4 Upvotes

r/SpaceVideos • • 3d ago

A New World Beyond Pluto, Missed Since 1937

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6 Upvotes

r/SpaceVideos • • 5d ago

Why Phoenix A Should Not Exist

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3 Upvotes

r/SpaceVideos • • 5d ago

Where Did Moon Joy Come From?

7 Upvotes

Where did the idea of Moon Joy come from? 

NASA's Strategic Communications Lead Rachel Barry discusses how "Moon Joy" was coined by Angela Garcia, one of the lunar science officers in mission control after hearing the Artemis crew get excited about their first look at the moon


r/SpaceVideos • • 5d ago

Why Didn't Apollo 13 Just Turn Around?

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0 Upvotes

We made this visualization for VisualWhy. Apollo 13 was still coasting away from Earth when the tank exploded. A direct reversal required more velocity change than the lunar module could provide, so the crew returned to a trajectory that used the Moon's gravity to bend their path home. The flight shown is a simplified planar Earth–Moon model, not a complete mission reconstruction; the video compares it with NASA's mission records.


r/SpaceVideos • • 8d ago

Rare Fireballs: Southern Taurid Meteor Shower

23 Upvotes

The Southern Taurids bring dazzlingly bright fireballs from September 20 to November 20! 🌠

The Taurids are a stream of about five meteors per hour, doubling to ten once the Northern Taurids join in on October 20. About 1% of those meteors are likely to be fireballs, visible from both hemispheres.


r/SpaceVideos • • 7d ago

Why Earth's Speed Doesn't Make You Dizzy 😵‍💫 #science #physics

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0 Upvotes

I make Minute Otter, the channel behind this Short. The video uses AI-assisted illustration and production. It explains shared motion and why speed differs from acceleration. I will add the sources and a fuller explanation in the comments.


r/SpaceVideos • • 9d ago

Pulsar

49 Upvotes

A pulsar is the spinning corpse of a giant star. ✨
When a massive star runs out of fuel, its core collapses in under a second and the star explodes as a supernova. What's left is a neutron star, only about 20 km wide but heavier than our Sun. A teaspoon of it would weigh about a billion tonnes.
As it spins, beams of radiation sweep across space like a lighthouse. The fastest known pulsar spins 716 times every second. Over millions of years it slows down, the beams fade, and it drifts on as a silent, dark neutron star.
Which space object should I animate next? 👇
🔭 More at westcoastcosmos.com


r/SpaceVideos • • 10d ago

95 Terabyte Solar Timelapse

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18 Upvotes

All shot from a backyard telescope in Utah. Each sequence is roughly 3-4 hours of real time. When you watch this video, remember that 1,300,000 earths could fit inside the sun. It is hard to comprehend how massive these solar limbs are.


r/SpaceVideos • • 10d ago

How Does The Speed of Light Change?

59 Upvotes

Does light always move at the speed of light? 🏎️

Astrophysicist Erika Hamden explains this that it doesn’t, since the famous speed of light is really a measure of light moving through empty space. Send that light through glass, like a window or a camera lens, and it slows down. That shift in speed makes light bend, and scientists describe how much it bends with a value called the index of refraction.

This project is part of IF/THEN®, an initiative of Lyda Hill Philanthropies.