Whoa! Juno is still transmitting?! I thought that spacecraft had a really limited lifespan, due to the radiation ring around Jupiter. Pretty awesome that it's still working!

Well if there's not enough sun, wind could be a better option. I don't know much about the climate in slovenia, so either could make more sense.

As for these new kinds of batteries, I don't have the hard numbers on hand, but I know the current installed capacity is really small. So as a product, they're still really new.

Grid scale storage has come a long way. There are saltwater batteries and flow batteries in use now, those technologies are here, they're just still being iterated on and improved. And as the renewables get increasingly affordable, the demand for storage will rise with it. Now we're still mostly deploying expensive lithium batteries, but as more of that gets installed, the demand for cheaper storage will skyrocket. And production generally follows demand.

No joke

Yeah, that's a surprisingly clear red flag...

But hey, maybe she'll be successful, the GoP is pretty into crazy these days.

So what's the battery chemistry? Also, do they actually have an aircraft design, or is this just battery news?

Yeah, it totally could be.

The whole ship either has to have enough energy to last potentially 100000 years.

Well, that depends on how far you're going. If you pick a nice close target, let's say 3 light years away, you can potentially get there pretty quickly. With fusion propulsion systems you could make the trip is something like 70 years, coasting most of the way. I'd need to check the math to get exact numbers, but I recall fusion allowing for pretty reasonable trip times.

But if you can survive for hundreds or thousands of years, then solar sails become an option. Then it becomes a materials science problem of how thin can you make a sail that will still hold together. The greater the sail to payload ratio, the faster you go.

Or synthetic life. (Robots)

Not really. Galaxies are pretty stable, stars orbit around the central black hole in the galaxy. You can absolutely travel between stars in the same galaxy, even if it takes a thousand years.

I don't think there is a great filter. I think there's an easy solution to the fermi paradox that doesn't require great filters, we're just the first intelligence in this galaxy.

Here's my reasoning: intelligent species that manage to develop space travel probably do tend to expand out into their galaxy. When they achieve this level of technology they can settle most of all of their galaxy in a matter of 10,000 years or so. That time period is very brief on an evolutionary scale. It's estimated that life began on earth 3.7 billion years ago. That means it took about 3.7 billion years for earth to produce intelligent life, and then from that point it would take a mere 10,000 years to reach modern day, and 10,000 more years to settle the whole galaxy. That expansion happens so quickly compared to how long it took the planet to develop intelligent life, that the chance of two civilizations rising at the same time becomes very small.

It all boils down to this: there are no intelligent aliens out there in our galaxy, because we are the first intelligent species in our galaxy. We know we're the first because if we were second, then aliens would already have settled this star system.

Probably there are lots of alien civilizations out there in the universe, but they're in different galaxies.

I totally agree. I know a teacher who who likes to say:

"I believe there really is no such thing as a dumb question. As long as it's an honest question (not rhetorical or sarcastic), then it's a genuine request for more information. So even if it's coming from a place of extreme ignorance, asking a question is an attempt to learn something, and the effort should be applauded."