reddit455

reddit455 t1_jefr3hk wrote

doubt it.

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Wimbledon is the Olympics of Tennis. the Olympics let you compete as an Independent.. (for basically any reason)

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2022 Winter Olympics
Further information: Russian Olympic Committee athletes at the 2022 Winter Olympics
Following a decision by the World Anti-Doping Agency (WADA), it was announced that Russia would compete under the acronym "ROC", after the name of the Russian Olympic Committee. On aftermatch, the IOC announced that the Russian national flag would be substituted by the flag of the Russian Olympic Committee. It would also be allowed to use team uniforms featuring the Russian national colours, the logo of the Russian Olympic Committee and bearing the acronym "ROC".[27]

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https://en.wikipedia.org/wiki/Independent_Olympians_at_the_Olympic_Games

Athletes have competed as independent Olympians at the Olympic Games for various reasons, including political transition, international sanctions, suspensions of National Olympic Committees, and compassion. Independent athletes have come from North Macedonia, East Timor, South Sudan and Curaçao following geopolitical changes in the years before the Olympics, from the Federal Republic of Yugoslavia (present-day Montenegro and Serbia) as a result of international sanctions, from India and Kuwait due to the suspensions of their National Olympic Committees, and from Russia for mass violations of anti-doping rules.

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reddit455 t1_jebcmkk wrote

> Just trying to get an accurate idea of what space looks like?

you cannot hold your eyes open for seconds/minutes/hours at a time.

space will never look to your eyes like it does in pictures.

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>but why can’t you see the stars in a lot of published space photos?

because the image is too bright to see dim stars in the background.

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imagine trying to see a birthday candle on the hood of a car with the headlights on.. the entire picture would be washed out if you left the shutter open long enough to capture the stars.

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reddit455 t1_je692ds wrote

we watch closely for a reason.

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SPACE WEATHER PREDICTION CENTER
NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION

https://www.swpc.noaa.gov/

R3 (Strong) HF Radio Blackout Event 29 March, 2023 UTC-Day
published: Wednesday, March 29, 2023 03:14 UTC
A R3 (Strong) HF radio blackout event occurred due to a X1.2 flare from Region 3256 on 28 March, 2023, at 10:33 pm EDT (29/0233 UTC).

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reddit455 t1_jdelqo4 wrote

space X reuses Falcons a lot.

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https://www.designnews.com/design-hardware-software/spacex-reveals-3d-printed-rocket-engine-parts

SpaceX's first 3D-printed rocket engine part already launched on the Falcon 9 rocket in January for the THAICOM 6 mission. One of the rocket's Merlin 1D engines contained a 3D-printed main oxidizer valve (MOV) body. The valve operated correctly with high-pressure liquid oxygen, withstanding high vibration and cryogenic temperatures. The printed valve body has better strength, fracture resistance, and ductility than a part made with traditional casting, as well as lower variability in material properties. It was also a lot faster to make, being printed in two days instead of several months. The valve is now qualified to fly on all Falcon 9 flights.

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reddit455 t1_jdekuc7 wrote

>Since repeatability is not great for printed parts that means each piece has to be thoroughly tested before use which adds expense of its own, or risk if you don't follow a full test program. I think we will see that reliability is a challenge with their approach.

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85% printed by mass, including the engines. they fuse metal powder with lasers.

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"desktop" version

https://www.protolabs.com/services/3d-printing/direct-metal-laser-sintering/
High Resolution 0.00079 in. 20 microns

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the only reason spaceX can turn a falcon9 around so quick is because they DO NOT need to test parts... they make many precise copies quickly.. no leaky fuel valves please.

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SpaceX Reveals 3D-Printed Rocket Engine Parts
https://www.designnews.com/design-hardware-software/spacex-reveals-3d-printed-rocket-engine-parts

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using direct metal laser sintering (DMLS).

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SpaceX's first 3D-printed rocket engine part already launched on the Falcon 9 rocket in January for the THAICOM 6 mission. One of the rocket's Merlin 1D engines contained a 3D-printed main oxidizer valve (MOV) body. The valve operated correctly with high-pressure liquid oxygen, withstanding high vibration and cryogenic temperatures. The printed valve body has better strength, fracture resistance, and ductility than a part made with traditional casting, as well as lower variability in material properties. It was also a lot faster to make, being printed in two days instead of several months. The valve is now qualified to fly on all Falcon 9 flights.

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>that reliability is a challenge with their approach.

i don't think so.. I suspect this booster is still flying.

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March 18, 2022

https://www.nasaspaceflight.com/2022/03/spacex-booster-reuse-record-starlink/

Saturday’s mission marked the first time a Falcon 9 booster flew for a 12th time and brought the total number of Starlink satellites launched to over 2,300.

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this is the horizontal printer that welds wires for the body components and tanks.

Relativity unveils Stargate 4th Generation metal 3D printer with horizontal printing capability

https://www.tctmagazine.com/additive-manufacturing-3d-printing-news/metal-additive-manufacturing-news/relativity-unveils-stargate-4th-generation-metal-3d-printer-/

Relativity says that its new Stargate printer technology ‘defies traditional printing constraints’ by moving horizontally as it feeds multiple wires into a single print head. The company is also confident that the Stargate 4th Generation technology are capable of printing a rocket with 100x fewer parts in a matter of months, while customised software and machine learning techniques are being developed to support the printing of more complex and larger metal products.

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reddit455 t1_jdb1qqp wrote

did you ever see

https://en.wikipedia.org/wiki/Millennium_(TV_series)

Millennium is an American television series created by Chris Carter (creator of The X-Files), which aired on Fox from October 25, 1996, to May 21, 1999. The series follows the investigations of ex-FBI agent Frank Black (Lance Henriksen), now a consultant, with the ability to see inside the minds of criminals, working for a mysterious organization known as the Millennium Group.

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it's a worthy distraction.

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reddit455 t1_jda9rsm wrote

>The NASA OIG's report [PDF] reviews NASA's Radioisotope Power Systems (RPS) program, which began in 2010 with the goal of developing next-generation power systems for spacecraft

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i wonder if they can scale the "surface model" down to fit on spacecraft... assuming they're talking about probes. 10 kilowatts is not necessary.

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https://www.nasa.gov/press-release/demonstration-proves-nuclear-fission-system-can-provide-space-exploration-power

​Kilopower is a small, lightweight fission power system capable of providing up to 10 kilowatts of electrical power - enough to run several average households - continuously for at least 10 years. Four Kilopower units would provide enough power to establish an outpost.

The prototype power system uses a solid, cast uranium-235 reactor core, about the size of a paper towel roll. Passive sodium heat pipes transfer reactor heat to high-efficiency Stirling engines, which convert the heat to electricity.

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reddit455 t1_jd8kodw wrote

>But scaling it down and using a tennis ball or a marble to represent either earth or the solar system could it be possible?

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it is not possible to print a picture of the solar system to scale.

either the distances are too big, or the planets are too small.

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https://vimeo.com/139407849

On a dry lakebed in Nevada, a group of friends build the first scale model of the solar system with complete planetary orbits: a true illustration of our place in the universe.

https://en.wikipedia.org/wiki/Sweden_Solar_System

The Sweden Solar System is the world's largest permanent scale model of the Solar System.

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Cycle the Solar System

https://www.york.ac.uk/physics-engineering-technology/outreach/astrocampus/cycle-solar-system/

The York Solar System model is a scale model of the Solar System, spread out along 6.4 miles (10km) of the old East Coast mainline railway. Along it you can find scale models of all the planets in our solar system as well as models of the Cassini and Voyager spacecraft.

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reddit455 t1_jd8c996 wrote

>For some in industry, though, spending as much as $1 billion to bring down the station sends the wrong message and is also a missed opportunity to instead repurpose elements of the station, recycling material that could be used for other commercial applications.

exposed to temperature extremes, radiation and pressure for decades.

how do you assess fatigue?

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reddit455 t1_jd5ty89 wrote

>“If we want to warm up the atmosphere of Mars, what if we use global warming?”

but we can't even pluck the CO2 out of Earth's already incredibly useful atmosphere.

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trying to make something useful out of "nothing" is much much harder.

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https://en.wikipedia.org/wiki/Terraforming

Terraforming or terraformation ("Earth-shaping") is the hypothetical process of deliberately modifying the atmosphere, temperature, surface topography or ecology of a planet, moon, or other body to be similar to the environment of Earth to make it habitable for humans to live on.

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reddit455 t1_jd5hfj0 wrote

there's a lot of stars with planets. you want to find ONE PLANET.

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>Why is it so order in our own backyard?

this covers a patch of sky the size of your thumbnail held at arms length. 10,000 galaxies, each with tens of millions of stars... each of those stars with planets.

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The Hubble Ultra-Deep Field (HUDF) is a deep-field image of a small region of space in the constellation Fornax, containing an estimated 10,000 galaxies.

https://en.wikipedia.org/wiki/Hubble_Ultra-Deep_Field

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this covers a patch of sky the size of a grain of sand held at arms length

NASA’s Webb Delivers Deepest Infrared Image of Universe Yet
https://www.nasa.gov/image-feature/goddard/2022/nasa-s-webb-delivers-deepest-infrared-image-of-universe-yet/

NASA’s James Webb Space Telescope has delivered the deepest and sharpest infrared image of the distant universe so far. Webb’s First Deep Field is galaxy cluster SMACS 0723, and it is teeming with thousands of galaxies – including the faintest objects ever observed in the infrared.

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reddit455 t1_jd5f8f2 wrote

took the biggest rocket we have to send the mass equivalent of a Honda Civic to fetch a sample. problem is, you have to CATCH UP first.

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https://www.nasa.gov/osiris-rex

OSIRIS-REx traveled to near-Earth asteroid Bennu and is bringing a small sample back to Earth for study. The mission launched Sept. 8, 2016, from Cape Canaveral Air Force Station. The spacecraft reached Bennu in 2018 and will return a sample to Earth in 2023.

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>could mine the asteroid for all of the materials needed for survival. This could allow say a small spacecraft to fully colonise the comet and fortify it for long distance travel.

not anytime soon.

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reddit455 t1_jd0z6b9 wrote

>What I'm saying is, perhaps we're the only intelligent species to have gone down this specific route of industrialisation to sending radio waves into space.

there are a lot more "perhapses"

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> what if aliens simply aren't taking the same path we are (even though they may be as intelligent or more intelligent than us) and so that's why we haven't found any evidence; they're just not doing the same things as we are. If this is the case, then perhaps the nearest species that went a similar path to us is so far away and so uncommon that we may never know about them.

that is also possibly correct.

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there must be tons of civilizations.

https://en.wikipedia.org/wiki/Drake_equation

The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way Galaxy.

...then where are they?

https://en.wikipedia.org/wiki/Fermi_paradox

The Fermi paradox is the discrepancy between the lack of conclusive evidence of advanced extraterrestrial life compared to the apparently high a priori likelihood of its existence.[1][2] As a 2015 article put it, "If life is so easy, someone from somewhere must have come calling by now."[3]

>Why do we assume

because it's all we KNOW.

we use radio, if ET uses radio, maybe we get lucky.

but since we have no idea what other means to employ - what can we possibly use other than that which we know?

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they could just as easily not have eyes, ears or mouths.

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reddit455 t1_jczh82t wrote

>If you try and send information between the 2 spaceships. If we use light or radio waves surely the data carried on those wavelengths are corrupt due to red shift.

you KNOW the transmission frequency. you know redshift. in theory you could correct for it.

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>Making it impossible for long distance data transfer in space between 2 objects that are moving away.

it's going to be "one way" both ways.. 20 light hour delay is not conducive to conversations.

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https://www.jpl.nasa.gov/news/engineers-investigating-nasas-voyager-1-telemetry-data

Voyager 1 is currently 14.5 billion miles (23.3 billion kilometers) from Earth, and it takes light 20 hours and 33 minutes to travel that difference.

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reddit455 t1_jcws9tg wrote

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https://www.nasa.gov/specials/artemis/

With Artemis missions, NASA will land the first woman and first person of color on the Moon, using innovative technologies to explore more of the lunar surface than ever before. We will collaborate with commercial and international partners and establish the first long-term presence on the Moon. Then, we will use what we learn on and around the Moon to take the next giant leap: sending the first astronauts to Mars.

>Therefore, I call upon the American people to embrace this challenge and to work tirelessly towards this goal. We must invest in research and development, inspire the next generation of scientists and explorers, and push the boundaries of what is possible.

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America can't afford it.

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https://www.nasa.gov/specials/artemis-accords/index.html

The Artemis Accords will describe a shared vision for principles, grounded in the Outer Space Treaty of 1967, to create a safe and transparent environment which facilitates exploration, science, and commercial activities for all of humanity to enjoy.
More than a dozen countries have signed the Artemis Accords.

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reddit455 t1_jcvxpzc wrote

>Since today is a Sunday, I suspect we will be getting an announcement tomorrow, on Monday, that the series has been pushed back.

3/31 is a Friday.. they have ~2 full weeks.

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my tin foil hat theory is they're waiting until possible indictments drop on a certain former POTUS. Nixon will start "trending".. every talking head is going to say it 20x a night - that's a lot of free PR.

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reddit455 t1_jcvf7bo wrote

>What do you think is the most likely explanation for the Fermi paradox?

how long have we had radios?

vs

radio signal travel time?

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https://en.wikipedia.org/wiki/Arecibo_message

The message was broadcast into space a single time via frequency modulated radio waves at a ceremony to mark the remodeling of the Arecibo Telescope in Puerto Rico on 16 November 1974.[1][2] The message was aimed at the current location of M13, about 25,000 light years from Earth, because M13 was a large and relatively close collection of stars that was available in the sky at the time and place of the ceremony

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what if they just don't want to talk to us?

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reddit455 t1_jcq2jip wrote

https://en.wikipedia.org/wiki/Drake_equation

The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way Galaxy.[1][2]

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https://en.wikipedia.org/wiki/Fermi_paradox

The Fermi paradox is the discrepancy between the lack of conclusive evidence of advanced extraterrestrial life compared to the apparently high a priori likelihood of its existence.[1][2] As a 2015 article put it, "If life is so easy, someone from somewhere must have come calling by now."[3]

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> It might sound far fetched but the universe is highly believed to be stretched out to infinity?

it's kind of hard to speculate about the number of fish in the ocean when all you have is a half drop of water.

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The Hubble Deep Field: The Most Important Image Ever Taken

https://www.youtube.com/watch?v=mcBV-cXVWFw

In 2003, the Hubble Space Telescope took the image of a millenium, an image that shows our place in the universe. Anyone who understands what this image represents, is forever changed by it.

20 years later, consider what JWST has done.

Hubble is cute little toy.

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even if ET picks up on the first ring... in 24,950 years, it's going to be another 25,000 until we hear back.

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https://en.wikipedia.org/wiki/Arecibo_message

The message was aimed at the current location of M13, about 25,000 light years from Earth, because M13 was a large and relatively close collection of stars that was available in the sky at the time and place of the ceremony.

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reddit455 t1_jcb3i2w wrote

"they've gone viral"

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>Why ppl are so obsessed with Coho's novels or any other books that are in trend cause of booktok or other platforms like that. What is in it? And yep I've read one of her books 'it ends with us cause my roommate had it and for me it was a total waste of time. So why ppl are so interested in it? Is this because they are new readers? Or because the language is easy? Or maybe because everyone's commenting on it? Either the comments are positive or negative

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it's not necessary to follow the herd on books.

do you try to do every viral trick out there?
why not?

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https://en.wikipedia.org/wiki/Milk_crate_challenge

The milk crate challenge, also known as the crate challenge, is a video challenge that became viral online in August 2021. The challenge involves stacking milk crates into a structure that resembles a podium, with both sides of the structure functioning as stairs.[1] The participant is expected to climb up to the top of the crates and climb back down without destroying the structure or falling, risking injury.[2][3] The activity has faced criticism by health professionals for its unnecessary risk to personal health.[4] Social media platform TikTok that helped popularize the trend said it would eliminate search results for "milk crate challenge" citing its policy that "prohibits content that promotes or glorifies dangerous acts."[5]

maybe a certain type of person reads these books.. the same type who feel it's necessary to record every minute of their lives.

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what kind of books appeal to the people who do that?

if you're not that type of person, maybe the books will not appeal to you.

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BookTok is a subcommunity on the app TikTok, focused on books and literature. Creators make videos reviewing, discussing, and joking about the books they read. These books range in genre, but many creators tend to focus on young adult fiction, young adult fantasy, and romance.[1] The community is cited with impacting the publishing industry and book sales.[2] The creators in this community are also known as BookTokers.[3]

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reddit455 t1_jcarsod wrote

>Personally, I find the lore and the universe of Hobbit / LOTR a bit dull

that's fine. it's not necessary to like every single popular book.

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