So he's speculating just like everyone else? Doesn't seem all that informative to me.
There's a range of theories out there - I don't think anyone is claiming little green men. I prefer this quote from the University of California, Berkeley from the Scientific American article about the same radio transmission:
Most curiously, it occupies a very narrow band of the radio spectrum: 982 megahertz, specifically, which is a region typically bereft of transmissions from human-made satellites and spacecraft. “We don’t know of any natural way to compress electromagnetic energy into a single bin in frequency” such as this one, Siemion says. Perhaps, he says, some as-yet-unknown exotic quirk of plasma physics could be a natural explanation for the tantalizingly concentrated radio waves. But “for the moment, the only source that we know of is technological.”
So he's speculating just like everyone else? Doesn't seem all that informative to me.
There's a range of theories out there - I don't think anyone is claiming little green men. I prefer this quote from the University of California, Berkeley from the Scientific American article about the same radio transmission:
Most curiously, it occupies a very narrow band of the radio spectrum: 982 megahertz, specifically, which is a region typically bereft of transmissions from human-made satellites and spacecraft. “We don’t know of any natural way to compress electromagnetic energy into a single bin in frequency” such as this one, Siemion says. Perhaps, he says, some as-yet-unknown exotic quirk of plasma physics could be a natural explanation for the tantalizingly concentrated radio waves. But “for the moment, the only source that we know of is technological.”
What more do you want from it ? No one really knows what it is and everyone has to speculate. The quote you just used is speculation as well.
I don't doubt Phil Plait - I am aware of his work and blog. I just prefer sources that aren't aligned with TV channels.
And the Scientific American article is not sensationalist in the slightest. Did you even read it? I think it's a more complete piece on the matter, and quotations from the actual team on the Breakthrough Listen itself. Plait doesn't go in as much depth and does not appear to talk to the BL team themselves. This seems like lazy journalism, even from a professional. At least he's got this nugget after his meme, though:
But I'll admit I'm scratching my head. This signal's frequency isn't one generally used by satellites and such. And Proxima is located deep in the southern sky, pretty far from the kinds of orbits you'd expect of satellites that could emit such a signal (though not impossible; two astronomer friends of mine have been speculating over this on Twitter in fact). A slowly moving Earth satellite that happened to be near Proxima in the sky at the time could emit a signal with a shift in frequency, but we'll have to wait and see if the scientists looked into the specifics of that.
TORONTO -- A massive asteroid that may be bigger than the length of two football fields is set to fly past Earth on Christmas Day, according to NASA.
The space agency says asteroid 501647 (designated 2014 SD224) will make its closest approach around 8:20 p.m. UTC (3:20 p.m. ET) on December 25, coming within 0.02019 astronomical units or approximately 3 million kilometres of the Earth's surface.
NASA says the asteroid, which is travelling at a speed of 10 kilometres per second, has a diameter between 92 and 210 metres. This means it could range from the size of the Statue of Liberty to the length of two NFL-size football fields.
Quote:
In addition to 2014 SD224, NASA says two other asteroids known as 2020 XY and 2020 YM1 are expected to fly past Earth on Christmas. Both of these asteroids are also considered NEOs, but are much smaller than asteroid 501647 and pose no threat to Earth, according to the agency.
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Video from today's high altitude SpaceX test and the crash
You mean ‘Rapid Unscheduled Disassembly’.
9 looks like it had similar issues to 8 in only getting one engine lit for the flip. All of this is so awesome and exciting though. That belly flop maneuver is incredible.
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Quote:
Originally Posted by Scroopy Noopers
You mean ‘Rapid Unscheduled Disassembly’.
9 looks like it had similar issues to 8 in only getting one engine lit for the flip. All of this is so awesome and exciting though. That belly flop maneuver is incredible.
I prefer the term "Engine Rich Burn"
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‘Oumuamua made headlines when astronomers discovered it in 2017. Harvard professor Avi Loeb's new book lays out the case for why the object might be artificial and argues that scientists should embrace bold theories.
I wonder if they'll have to rethink that last second flip maneuver.
I was thinking maybe if they start the flip earlier to give themselves more time to adjust unknowns, but I guess if the engine fails to light that's not the fault of the flip, at least not directly. And flipping earlier would mean regaining some speed that would have to be countered with more fuel.
I'm pretty sure I read somewhere that the tank designs they had to feed the engines during the flip were a first pass attempt at a minimal mass solution and that there was other ideas that would be more reliable but would take up mass.
I found it odd that they rolled out SN10, wasn't there a non-zero chance a crash could have harmed it?
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Scott Manley seems to think the second engine had a air bubble in one of its lines and at those operating pressures its a guaranteed RUD (Rapid Unscheduled Disassembly). SpaceX might have to take a second look at its fuel delivery system since it is the root cause of both unsuccessful landings.
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