After 53 years, a failed Soviet Venus spacecraft is crashing back to Earth
46 comments
·April 29, 2025marcusb
Swizec
> The Soviet Venera program was really fascinating
Reading my uncle’s old tech magazines and sci-fi from the 70’s was fascinating. Eastern European sci fi was all about colonizing Venus and the Venera landers. The way kids in USA are obsessed with Mars, kids in my part of Europe used to be obsessed with Venus before the influx of Western media.
Getting to grow up on the cusp of that vibe shift was cool.
chasil
This Kurzgesagt video is equally sci-fi, but of the "potentially possible if we wanted to bankrupt the planet" variety.
glimshe
Cool! What tech magazines are you talking about?
Swizec
Življenje in tehnika[1] – popular science magazine in Slovenia that's been running since 1950. Grandparents used to have my uncle's collection from I guess his high school years. Spanned from the mid 70's and into the 80's.
I used to read random issues when I'd go visit. My favorite were the 70's stories about "We are imminently going to have AI cars. Experiments are underway and trucks can now autonomously drive long distances on the highway! Humanoid robots are coming soon look at this super dextrous hand!!".
romanhn
Not the OP, but Tekhnika Molodezhi (Technology for the Youth) was quite popular in the Soviet Union. https://www.itsnicethat.com/features/tekinkia-molodezhi-russ...
mananaysiempre
On the sci-fi side one notable example is The Land of Crimson Clouds (Страна багровых туч, 1959) by the Strugatsky brothers. Unfortunately, there’s no official English translation that I can find.
TurkTurkleton
There's a collection of images returned by the various Venera probes (including the surface photos from Venera-9, -10, -13, and -14) restored from tapes of the original transmissions here: http://mentallandscape.com/C_CatalogVenus.htm
Edit: Oop, missed that someone else posted a link to that same site (different page) a while before me. Well, nevertheless.
andrewflnr
Such an incredible mixture of badass achievement and hilarious failure. I guess that's kind of in character for the Soviets, but you don't usually see the two ends of the spectrum mixed so closely.
dmix
Probably the coolest space program after Apollo.
The photos, the huge effort involved, and general strangeness of Venus is a great read. Lots of good youtube docs as well.
Paul-Craft
The Soviets literally beat the US to every single major milestone in the space program, up through the 60's, except for literally landing men on the moon.
WillPostForFood
US had a couple good milestones with the Mariner program. Mariner 2 was the first Venus flyby in 1962, and Mariner 4 was the first Mars flyby in 1965.
Cthulhu_
I read about it years ago, I never knew they actually landed on Venus.
That said, I wonder whether with advances in material science and the likes they could build something that lasts longer.
chasil
You will want to see these photos.
euroderf
I want to see the proposed balloon missions proceed and succeed.
Sylleib
Another cool site with lots of details and pics: http://mentallandscape.com/V_Venus.htm
xattt
> As this is a lander that was designed to survive passage through the Venus atmosphere, it is possible that it will survive reentry through the Earth atmosphere intact, and impact intact.
I did not consider this outcome at all, but this makes sense. I am hoping the descent mechanism activates and the spacecraft lands intact.
orbital-decay
It will not, of course - anything that's inside is long dead, not designed for Earth atmosphere, and it had to be programmed to trigger in the first place.
In fact, the capsule could also burn up on reentry. Sure, it's a Venera-8 double designed to enter Venus' atmosphere at 11.6km/s... but it has extra mass on it (the upper stage never separated so it should look like [1]) and the capsule's CoG doesn't take all that stuff into account, which might cause it to tumble, reenter backwards, or damage it. On the other hand, it's reentering from a really low-energy orbit so it could survive the reentry - but not the impact in case it lands on the ground.
renhanxue
Marco Langbroek, who did the reentry forecast that the linked article is based on, convincingly argues[0] that the bus did separate and reenter separately (in 1981) and what remains in orbit is just the lander. There are several independent pieces of evidence that are consistent with this; the orbital decay pattern, the radar cross section and optical telescope observations all point to only the lander itself remaining.
See also his blog[1] for an up-to-date reentry forecast.
[0]: https://www.thespacereview.com/article/4384/1
[1]: https://sattrackcam.blogspot.com/2025/04/kosmos-842-descent-...
azernik
The descent mechanism would be built for the much denser Venusian atmosphere. On Earth, it may not slow the thing down enough.
wolrah
> I am hoping the descent mechanism activates and the spacecraft lands intact.
I think it's a safe bet that any descent mechanism designed for the thick atmosphere of Venus is not going to function the same way on Earth.
null
accrual
That would be pretty cool indeed. My only concern is that the craft probably doesn't have any attitude control, so it may enter backwards or tumbling, which may limit the effectiveness of the heatshield on the probe. Even so, surely large pieces of it will make it back home intact.
voidUpdate
If it is the same as other venera probes, it is designed so that aerodynamic forces will stabilise it into a heatshield-forward attitude
arprocter
Live map here:
harywilke
That's really cool. Do you think this will be visible for those near the entry path?
dhc02
I like to imagine as if we threw something into the air so hard that it went up for 26 years, then came back down for 26 years.
trympet
I’m not much of a YouTuber shill, however, I feel this crowd would enjoy Scott Manley’s video [1] on the subject
sylens
Is there somewhere I can read about why the Trans Venus injection burn failed?
js2
> 1972 March 31 - . 04:02 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC31. LV Family: R-7. Launch Vehicle: Molniya 8K78M. FAILURE: The escape stage Block L's engine cut off 125 seconds after ignition due to timer failure.. Failed Stage: U.
http://www.astronautix.com/v/venera.html via https://www.thespacereview.com/article/4384/1 via Wikipedia article on the probe.
bragr
According to Wikipedia, the stage timer was set incorrectly so the injection burn cut out early.
rich_sasha
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SoftTalker
Hope it's not full of plutonium or other nasty stuff.
m4rtink
That would be more likely for outer system probes, where even simple radio isotope heaters could be very useful.
For Venus it is unlikely to need anything like that, as the expected flight duration was much shorter (quite important for not very durable Soviet electronics) and main issue would be actually cooling.
null
Molitor5901
This reminded me of space junk and what the heck are we going to do with it?? There's not enough money behind cleaning it up to make it even feasible. There are some interesting magnetic ideas, but overall it seems like the concept of space junk is just here to stay.
aaron695
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dumdedum123
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Crontab
I am old enough to remember watching those episodes when they debuted.
AccordionGuy
Damn it, I was going to post the same thing!
ojciecczas
I hope it crashes into Moscow.
The Soviet Venera program was really fascinating. It is quite impressive that they managed to build landers that survived even a short period on the surface of Venus, let alone return photographs.
https://www.astronomy.com/science/the-venera-program-interpl...
https://en.wikipedia.org/wiki/Venera