The thread for space cadets!

I was thinking earlier - it's a pretty common theme in science fiction that there were 'elder' races that preceded everyone else. Sometimes they seeded the galaxy with intelligent life, sometimes they set up interstellar transportation and communication networks. Well, as someone pointed out here, our immediate neighborhood seems very empty.

What if we are the elder race? What if it really took ~13 billions years for the universe to reach a state where life could evolve intelligence and we're one of the first out the gate? Better get to work on those Stargates.
 
Big bang and big crunch is so 80s... I am all for inter-brane collisions. That way the end (or the beginning) of the universe can happen anytime without any apparent reason. It is a bit as investing in bitcoin.
 
This is an awfully bold claim. It may be the opinion of a lot of scientists but less than a hundred years ago the entire universe was confined to our own galaxy. As always, more data is needed.

Sure, and new information is always welcome. But assuming the current understanding isn't totally wrong, scenarios like the universe contracting back to a singularity have been ruled out by the observation that the universe's expansion is accelerating.
 
Roscosmos announced it will launch Progress spaceship to the ISS by unusual trajectory, whatever that means.
May be they meant this time it actually reaches the destination instead of exploding or falling into the ocean. That would be unusual enough...
The launch was postponed yesterday.

But assuming the current understanding isn't totally wrong, scenarios like the universe contracting back to a singularity have been ruled out by the observation that the universe's expansion is accelerating.
I believe it wasn't ruled out completely, since nobody knows wth is dark energy. There are scenarios where expansion changes to contraction at some point.
 
Roscosmos announced it will launch Progress spaceship to the ISS by unusual trajectory, whatever that means.
May be they meant this time it actually reaches the destination instead of exploding or falling into the ocean. That would be unusual enough...
The launch was postponed yesterday.


I believe it wasn't ruled out completely, since nobody knows wth is dark energy. There are scenarios where expansion changes to contraction at some point.
The unusual trajectory was that they were going to essentially go straight towards the station instead of going into a series of holding orbits. This would bring the delivery time down from a few days to a few hours. It can help get sensitive supplies and experiments to the station quickly before they degrade for whatever reason. Usually though, when one of these types of launches is delayed it means they have to revert to a more traditional flight plan because it requires a specific orbital alignment to work.
 
Usually though, when one of these types of launches is delayed it means they have to revert to a more traditional flight plan because it requires a specific orbital alignment to work.

Until now I always sort of assumed that the ISS was in an equatorial orbit. Wondering why the orbital alignment isn't the same every 90 minutes led me to the discovery that the ISS orbit is far from equatorial.
 
I thought the same until i watched it passing over my head here in Spain. In fact it is a highly inclined orbit, more polar than equatorial. I suppose it is the more economic orbit if your main launchpad is at Kazakhstan.
 
Havn't they been doing this for a couple of years now? Or was it just manned Soyuzes?
I too thought they had done them for manned Soyuz flights but I'm not sure.
Until now I always sort of assumed that the ISS was in an equatorial orbit. Wondering why the orbital alignment isn't the same every 90 minutes led me to the discovery that the ISS orbit is far from equatorial.
This is it:
I thought the same until i watched it passing over my head here in Spain. In fact it is a highly inclined orbit, more polar than equatorial. I suppose it is the more economic orbit if your main launchpad is at Kazakhstan.
Before the Russians got involved in the ISS, the inclination was going to be in the 20's (matching KSC) but it was changed to this high inclination to accommodate the Russians. This posed some challenges for the Space Shuttle which had a bit of trouble getting to that high of an inclination with a useful payload. They had to upgrade the ET (orange tank) to make it lighter to compensate.


Trump has proposed either abandoning the ISS or turning it over completely to private companies by 2025. Of course he doesn't actually have the authority to do that (the US only owns 51% of it) but hey he's and idiot doing what idiots do.

He has also proposed cutting 5 major science missions, including the next big flagship telescope to go up after JWST (called WFIRST - wide field infrared space telescope) which would be used to hunt for exoplanets. Also, he's again proposing to cut off the Earth-imaging sensors and cameras on the DSCOVR mission which observes the Earth (and takes gorgeous pictures of it and the moon) from deep space because part of its purpose is climate change research. The satellite's already bought, paid for and on-orbit but he's going to shut down parts of it purely on spite.

Also he's making these big pronouncements on going to the Moon without actually providing funding, just like George Bush and Congress before him. It's not enough that he wrecks the rest of government, he has to extract his pound of flesh from NASA too.
 
Like a firework running out of sizzle... It does look that way, but maybe the same (or similar) force that caused inflation so unbelievably fast can snap back the universe. Given how everything seems to work by orbits from the atom to galaxies, maybe the universe is rotating and others are nearby. I find it strange that everything spins but cant remember hearing if the universe does. Would the pre-big bang singularity spin?
The universe doesn't form a disk so maybe not.
You've reminded me of an old Choose your own Adventure book called Hyperspace.
 
I was thinking earlier - it's a pretty common theme in science fiction that there were 'elder' races that preceded everyone else. Sometimes they seeded the galaxy with intelligent life, sometimes they set up interstellar transportation and communication networks. Well, as someone pointed out here, our immediate neighborhood seems very empty.

What if we are the elder race? What if it really took ~13 billions years for the universe to reach a state where life could evolve intelligence and we're one of the first out the gate? Better get to work on those Stargates.

I bet the aliens are out there, but hiding. That's probably what all the dark matter and/or energy is, alien civilizations
 
I was thinking earlier - it's a pretty common theme in science fiction that there were 'elder' races that preceded everyone else. Sometimes they seeded the galaxy with intelligent life, sometimes they set up interstellar transportation and communication networks. Well, as someone pointed out here, our immediate neighborhood seems very empty.

What if we are the elder race? What if it really took ~13 billions years for the universe to reach a state where life could evolve intelligence and we're one of the first out the gate? Better get to work on those Stargates.

My understanding is that such isn't considered very probable, but we have no real way to know even the probability.

As for heat death of the universe, there's still way too many unknowns to make a conclusion. It's fair to conclude that expansion-until-rip is more likely than something appearing that starts contraction. There's likely quite a bit we're not considering and some major drivers in what's happening we don't understand very well except "it's probably there" (dark matter/energy). We're still floundering about with collapse interpretation (which I find dubious, given increasingly macroscopic pre-collapse experiments + extra assumptions) vs many worlds and have no way to experimentally verify the constants in our equations 10+ galaxy lengths away.

Earth will get roasted alive long before then, humanity had best find a way to move around a bit. If we can't break c (and there's still no evidence we can) it's time to start looking at ways to make long, long trips without dying.
 
I too thought they had done them for manned Soyuz flights but I'm not sure.

This is it:

Before the Russians got involved in the ISS, the inclination was going to be in the 20's (matching KSC) but it was changed to this high inclination to accommodate the Russians. This posed some challenges for the Space Shuttle which had a bit of trouble getting to that high of an inclination with a useful payload. They had to upgrade the ET (orange tank) to make it lighter to compensate.


Trump has proposed either abandoning the ISS or turning it over completely to private companies by 2025. Of course he doesn't actually have the authority to do that (the US only owns 51% of it) but hey he's and idiot doing what idiots do.

He has also proposed cutting 5 major science missions, including the next big flagship telescope to go up after JWST (called WFIRST - wide field infrared space telescope) which would be used to hunt for exoplanets. Also, he's again proposing to cut off the Earth-imaging sensors and cameras on the DSCOVR mission which observes the Earth (and takes gorgeous pictures of it and the moon) from deep space because part of its purpose is climate change research. The satellite's already bought, paid for and on-orbit but he's going to shut down parts of it purely on spite.

Also he's making these big pronouncements on going to the Moon without actually providing funding, just like George Bush and Congress before him. It's not enough that he wrecks the rest of government, he has to extract his pound of flesh from NASA too.
I forgot to add the fact that Trump also wants to shut down NASA's educational office with his new budget proposal.
 
Since the odometer reads 0 the car still is under warranty.
 
Europe is trying to seed some re-usable rocket start ups. Well one, anyways.

DM7nMpLX4AEBwKO-879x485.jpg
So Europe is handing out maybe $20 million for small satellite launch vehicle development but the USAF is giving out $200 million.

From ~2000 until roughly today, Europe was the world leader in commercial satellite launches. It is now in second place to just a single company and they had a partial launch failure to ruin their long winning streak. European leaders are burying their head in the sand over reusability and by the time their next vehicle flies it will be too late to maintain their market share. Ariane 6 is just a slightly upgraded and slightly cost-optimized version of Ariane 5. Their Prometheus and Adeliene programs to look into reusability aren't being funded in a manner that will lead to actual flight hardware. Their Vega small satellite launcher is leaps and bounds more expensive and too powerful for most of the small sat market and they plan on further upgrading it which will likely make costs even higher. Finally, relying on Russian launch vehicles for the medium launch segment is folly for multiple reasons.

I really, really want Europe to get their act together ASAP. I do no think having the launch industry dominated by one or a few American companies is a good thing.
 
You'd think that once SpaceX takes over a significant amount of the market (right now they're at 1/3 or something like that? correct me if I'm wrong) you'd think that everybody will go "Okay.. yep.. reusable rockets. The market tells us we need to do this or we won't be able to compete"

I love that SpaceX continues to innovate like this. If they end up dominating the market, then so be it. If others want to join in, they will have to spend money on innovation as wel
 
You'd think that once SpaceX takes over a significant amount of the market (right now they're at 1/3 or something like that? correct me if I'm wrong) you'd think that everybody will go "Okay.. yep.. reusable rockets. The market tells us we need to do this or we won't be able to compete"

I love that SpaceX continues to innovate like this. If they end up dominating the market, then so be it. If others want to join in, they will have to spend money on innovation as wel
The thing is that 1/3 of the commercial launch market is dangerously close to catastrophic for other commercial launch providers. This is because the astronomically high costs of rocket production means that some minimum floor of business is required to keep commercial ventures open and more often than not launch providers are operating at levels not far above that floor.

To a lesser or greater extent, all launch providers are quasi-nationalized corporations with subsidized operations in one manner or another. Europe just completed 'privatization' of the Ariane Group which makes their rockets, however, they still guarantee block-buys of their rockets to help them meet that minimally viable launch cadence. Russian and Chinese launch providers are state-owned and are also guaranteed flights by their governments. India and Japan are also in the process of privatizing their launch providers but again, with guaranteed government launches.

While the guarantee of government flights could be seen as a method for sustaining these quasi-nationalized entities, the story of ULA is cautionary. ULA is a merger of the launch divisions of Boeing and Lockheed. They sued each other so many times during the late 90's, early 2000's that the government essentially forced them to merge in order to keep them in business for national security reasons. At the time, they had a healthy share of the commercial launch market. However, they became increasingly reliant on government launches (which have inflated costs for a lot of reasons) to the point where even their commercial offerings were hyper-expensive. This meant the market shifted heavily toward Arianespace (and temporarily to Russia until they began crashing a lot of rockets) which in turn meant ULA had to rely more on government launches, which drove costs up further, which caused them to lose more commercial work and so on in a vicious cycle.

The result was the US lost basically all commercial launch business through the 2000's and ULA has basically worked themselves into a corner where they just can't compete on the commercial market. Government launches have sustained them but their high costs have created a lot of anger with the government which is now in the process of weening themselves off of sole-sourcing all launches from ULA. If that company doesn't get their act together (and quick), it will likely collapse.

Arianespace, as an arm of the EU, is in a better position but only just. They have their heads in the sand right now and are frequently ridiculed by the French press for being unable to match SpaceX on price or technical prowess. The Chinese are even funding start up companies to create re-usable rockets and at this point the writing is on the wall for anyone who's paying attention.

Chinese hover test at 1:00
 
HOLY CRAP

I just saw they were watching that test from 50 feet away in an open hangar. Holy mother of god that is so freaking dangerous.

This company has cooler videos of their hover tests out there but I can't find them at the moment.

Anyways a ULA VP was forced to resign a couple of years ago when he was caught calling SpaceX's reusability plans 'stupid' during a talk he gave to university students. I wonder if he still feels they are stupid given how wildly successful Falcon 9 reuse has been?

China's major national launch provider isn't yet going all-in on reusability but clearly the government is interested in the technology given their funding of start ups. Meanwhile ULA has a paper plan to sever their main engines from the rocket and catch them via helicopter as they float down by parachute so they can re-use them. The project is unfunded AFAIK and is just a white paper. Europe has funded (at minimal levels) a re-usable engine program with wings and turbofan engines to sever the engines from the rocket and then fly them to a landing. But they aren't yet serious about it.

India and Japan aren't doing much in the way of reusability and Russia has proclaimed they will make a reusable rocket at some point in the next decade. However, Russia puts out a new space 'plan' every other week that is completely unfunded and is only useful for propoganda purposes and can't be taken seriously.

The rest of the market is trying to bring down costs but only by incremental improvements to the manufacturing process. Meanwhile SpaceX and Blue Origin are going headlong into revolutionary reuse technology that has the ability to bring down costs by huge margins instead of the tiny, incremental costs savings that enhanced manufacturing brings to the other players. The writing is on the walls.
 
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