Recent comments in /f/space

No-Zucchini2787 t1_jcw2ynw wrote

It's zone of avoidance. This is the dense part of our galaxy including the black hole etc. Visible light in this area is adsorbed by galactic centre and dust. Not a good area for visible light photography and hubble. At the same time it's paradise for Gaia, jwst, Spitzer etc, basically any nom-visible light telescope.

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Valuable-Extreme t1_jcw2ibn wrote

Don’t forget the radius… It is roughly 50 or 60 ly as early radio transmissions were to weak to get far enough without being weaker than background noise… Therefore we can only assume there is no intelligent life in a radius of 25 to 30 ly as they could have answered by now. That is just a super small area of space… We can only listen to them at this point…

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ledfrisby t1_jcw21ew wrote

Little known fact: the Moon is actually much smaller than Mars. It just looks bigger because it's so much closer. This is known as an optical illusion.

~The more you know~

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Sargatanus t1_jcw0maq wrote

Two species that were so closely related that interbreeding was possible, and archaeological evidence suggests that Neanderthals copied the tools and practices of Homo sapiens rather than creating their own, so I don’t think that quite counts, but I digress. If a species of dinosaur or therapsid had built cities and spaceships (which would be cool, but there’s no evidence for that) then that would be a different story.

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Professional-Owl2488 t1_jcw0ggu wrote

I think it's a mix of everything, life is likely very common, intelligent life like humans is likely very rare.

Mass extinction events happen every so many tens of millions of years so we have a limited time to advance our technology to the point where we are immune to it happening to us.

I am surprised humans haven't destroyed ourselves yet considering nuclear weapons, bioweapons and other WMD's exist.

Our technology is good but is it good enough to detect life on another planet?

The universe is unimaginably big and the distances between civilizations may be too great. I feel like our technology is only good enough to detect alien civilizations if the alien civilizations sends us a direct message with powerful equipment aimed right at us.

We haven't really been looking that long, maybe messages have already gone by. Maybe we aren't interesting enough to send messages to, maybe it's not wise to call out to darkness.

I think there are plenty of great reasons why we haven't directed alien life yet, but I am 100% confident it's out there. There are trillions of galaxies and each galaxy has hundreds of billions to trillions of stars, I just doubt we are that lucky to be the only planet with life.

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theillini19 OP t1_jcvzlvp wrote

My favorite picture I captured during the Moon/Mars occultation of December 2022. Captured with an Orion Skyquest XT8 8 inch Dobsonian and Nikon 1 J1 mirrorless camera.

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Only_Interaction8192 t1_jcvzi5z wrote

I think your point is very much a possibility, BUT why do you think intelligent life is rare? Even on Earth humans were not the only intelligent humanoid species. Neanderthal was believed to have been as intelligent as humans. So if intelligence has happened at least twice just on this planet, I don't think it's a stretch to believe it's happened elsewhere.

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wdd09 OP t1_jcvxgfx wrote

The Big Dipper as photographed over a palm tree on a Florida Beach. This was at Wakulla Beach in the St Marks Wildlife Refuge.

Sony a7iii and Viltrox 20mm f/1.8 lens.

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Adeldor t1_jcvv9kj wrote

Unlike heavier-than-air flight, this isn't in the category of a technical problem yet to be solved. It's more along the lines of not being able to reach temperatures below absolute zero.

By all understanding, FTL travel between two points in space appears to be impossible even when attempting to bypass direct FTL travel through that space via wormholes or Alcubierre drives. Alcubierre himself has doubts regarding his drive, indicating it has the potential to violate causality, a point supported by Prof. Allen Everett. Such violation is anathema to most cosmologists and physicists.

In other words, the speed of light is set not by light itself, but by causality. It is deeply fundamental to the nature of the universe. Even were FTL travel possible, it'd only be through phenomena such as multiple forking universal timelines, that is, one way trips out of "our" universe.

Meanwhile, beyond this somewhat dated paper (PDF) refuting White and Juday's claims, I couldn't find any refereed papers or sources for their interferometer. Have you one to provide?

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Anonymous-USA t1_jcvs26a wrote

The conclusion that there should be plentiful intelligent life is based upon probability of large numbers. Even if there were a trillion planets with intelligent life in our observable universe, that’s still less than one planet per galaxy. And there are about 100M stars in a galaxy (1T in Andromeda!), and dozens or more planets around most stars. So I don’t see the paradox. Advanced life is obviously incredibly sparse, and if there is one in the Andromeda galaxy, that’s still 2.5M light years away. Homo sapiens weren’t even around when the light we see from it today left that galaxy.

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ergzay t1_jcvs0yx wrote

Note: This was placed as a private agreement between the artist and the astronauts and then later tried to claim that the agreement was different than what the astronauts claimed and he tried to later profit off of it and sell 950 copies of the statue.

From wikipedia:

> The crew kept the memorial's existence a secret until after completion of their mission. After public disclosure, the National Air and Space Museum requested a replica of the statue. Controversy soon followed, as Van Hoeydonck claimed a different understanding of the agreement made with the astronauts and attempted to sell up to 950 copies of the statue. He finally relented under pressure from NASA, which had a strict policy against commercial exploitation of the US government space program.

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Outside-Ice-1400 t1_jcvqvas wrote

I like your theory. And if true, I find it entirely likely that the larger organism wouldn't have any idea that its sub-organisms were conscious - or perhaps that they even exist at all. The sub-organism environments might just be too damn small - like sub-particle small.

Then again I'm just riffing and have no idea what the hell I'm talking about.

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