Chilloutman Posted October 19, 2020 Posted October 19, 2020 2 hours ago, Guard Dog said: As you were all aware voyager one and voyager two are both beyond the Heliopause and out of our solar system. They are both reporting something very interesting now. The farther they get from the effectS of the sun the greater the density of charged particles per cubic centimeter of space has been: https://www.google.com/amp/s/www.sciencealert.com/for-some-reason-the-density-of-space-is-higher-just-outside-the-solar-system/amp. that seems counterintuitive to me. That there would be a greater amount of charged particles outside of the flu each of the sun then inside of it Didn't read that yet but would not it be because outside of sun gravity there is nothing pulling them in so that might explain why are there more 'free' particles? (I know there should probably be some micro gravity of the system anyway but maybe mass of free particles is pullgin them togather). Now lets see how big dum-dum I am.... I'm the enemy, 'cause I like to think, I like to read. I'm into freedom of speech, and freedom of choice. I'm the kinda guy that likes to sit in a greasy spoon and wonder, "Gee, should I have the T-bone steak or the jumbo rack of barbecue ribs with the side-order of gravy fries?" I want high cholesterol! I wanna eat bacon, and butter, and buckets of cheese, okay?! I wanna smoke a Cuban cigar the size of Cincinnati in the non-smoking section! I wanna run naked through the street, with green Jell-O all over my body, reading Playboy magazine. Why? Because I suddenly may feel the need to, okay, pal? I've SEEN the future. Do you know what it is? It's a 47-year-old virgin sitting around in his beige pajamas, drinking a banana-broccoli shake, singing "I'm an Oscar Meyer Wiene"
Guard Dog Posted October 19, 2020 Posted October 19, 2020 The thing about it that piques my curiosity Is that these particles have mass. Not a lot obviously but cumulatively over time will they cause a vehicle traveling in interstellar space like voyager to decelerate? Theoretically if you could accelerate to 50% of lightspeed and head towards Proxima Centauri would you still be going 50% of light speed when the time came to begin deceleration? 1 "While it is true you learn with age, the down side is what you often learn is what a damn fool you were before" Thomas Sowell
InsaneCommander Posted October 20, 2020 Posted October 20, 2020 On 10/18/2020 at 1:59 PM, Gromnir said: curious, the author o' the article didn't listen to albert. gravity don't "pull" or "force." need change your pov if you are gonna understand general relativity. earth is not pulling you down, but rather is rushing up towards you. is why you feel (and are) weightless if you, for example, jump off the roof o' a multi-storied building. *shrug* is extreme difficult to change pov if even the science writers is explaining using newtonian nomenclature. HA! Good Fun! Exactly. Everything wants to follow a geodesic (a straight line in curved space) and Earth is pulling your geodesic inside it. I think this is the best explanation I've seen so far: 1
InsaneCommander Posted October 20, 2020 Posted October 20, 2020 4 hours ago, Guard Dog said: The thing about it that piques my curiosity Is that these particles have mass. Not a lot obviously but cumulatively over time will they cause a vehicle traveling in interstellar space like voyager to decelerate? Theoretically if you could accelerate to 50% of lightspeed and head towards Proxima Centauri would you still be going 50% of light speed when the time came to begin deceleration? 50% of light speed is alot. So it might not reduce too much, but it would certainly happen. Specially if you consider collisions in the way there. Even a small fragment would hit the ship as a bullet or worse. 1
kanisatha Posted October 20, 2020 Posted October 20, 2020 On 10/19/2020 at 4:34 PM, Guard Dog said: The thing about it that piques my curiosity Is that these particles have mass. Not a lot obviously but cumulatively over time will they cause a vehicle traveling in interstellar space like voyager to decelerate? Theoretically if you could accelerate to 50% of lightspeed and head towards Proxima Centauri would you still be going 50% of light speed when the time came to begin deceleration? I knew the two Voyagers had left our solar system. But this new discovery is very interesting to me. Thanks for posting.
Gfted1 Posted October 21, 2020 Posted October 21, 2020 SpaceX fires up 3-engine Starship SN8 prototype ahead of epic test flight. 3 "I'm your biggest fan, Ill follow you until you love me, Papa"
Gfted1 Posted October 22, 2020 Posted October 22, 2020 'Smart Windows' Darken to Cool, Become Solar Panels When Hot. 3 "I'm your biggest fan, Ill follow you until you love me, Papa"
Gromnir Posted October 22, 2020 Posted October 22, 2020 On 10/19/2020 at 5:46 PM, InsaneCommander said: Exactly. Everything wants to follow a geodesic (a straight line in curved space) and Earth is pulling your geodesic inside it. I think this is the best explanation I've seen so far: video this is a fantastic video. we use a jumping off a building scenario all the time when am attempting to explain and am knowing based on the glassy-eyed stares we get in response, am rare making an impact. figured if it were good enough for albert einstein... thanks for the vid as we will unapologetic be using in the future. HA! Good Fun! 1 "If there be time to expose through discussion the falsehood and fallacies, to avert the evil by the processes of education, the remedy to be applied is more speech, not enforced silence."Justice Louis Brandeis, Concurring, Whitney v. California, 274 U.S. 357 (1927) "Im indifferent to almost any murder as long as it doesn't affect me or mine."--Gfted1 (September 30, 2019)
Gfted1 Posted October 30, 2020 Posted October 30, 2020 All systems go for UK’s £55M fusion energy experiment. 1 "I'm your biggest fan, Ill follow you until you love me, Papa"
Gfted1 Posted November 11, 2020 Posted November 11, 2020 SpaceX's Starship SN8 prototype fires its engines for the 2nd time. 1 "I'm your biggest fan, Ill follow you until you love me, Papa"
Lexx Posted November 13, 2020 Posted November 13, 2020 Sadly had some issues, so we probably won't see the 15km hop soon. "only when you no-life you can exist forever, because what does not live cannot die."
Gfted1 Posted November 25, 2020 Posted November 25, 2020 SpaceX's Starship SN8 prototype fires engines ahead of major test flight. 2 "I'm your biggest fan, Ill follow you until you love me, Papa"
rjshae Posted November 27, 2020 Posted November 27, 2020 Jupiter fly-over Not so much a discovery as just enjoyable to watch. 1 "It has just been discovered that research causes cancer in rats."
Raithe Posted December 3, 2020 Posted December 3, 2020 In the Engineering scene... ArsTechnica - Meet Ravn X, a fully autonomous air launched rocket for small satellites An Alabama-based startup unveiled a launch system unlike any other on Thursday in Jacksonville, Florida. The company is named Aevum, and until now it has largely operated in the background. But now, it's ready to show off some hardware, and it's starting with the "Ravn X" launch system's first stage. This autonomous aircraft and launch vehicle measures 24 meters long and has a wingspan of 18 meters. It has a gross takeoff mass of 25,000kg—massive for an uncrewed aerial vehicle. Also, Ravn X looks really slick. Without a pilot on board, the drone can pull significantly higher g-loads and steeper ascent trajectories as it releases a rocket at altitudes between 10 and 20km. "We claim that our aircraft is a first stage because it actually contributes delta V," Jay Skylus, Aevum's founder and CEO, said in an interview with Ars. 1 "Cuius testiculos habeas, habeas cardia et cerebellum."
rjshae Posted December 3, 2020 Posted December 3, 2020 Drone footage shows the shocking collapse of the Arecibo Observatory Now if I were really, really paranoid, I might suspect that the CCP had sabotaged Arecibo just to get scientists to start using FAST (Five-Hundred-Meter Aperture Spherical Radio Telescope). But that would just be crazy thinking. Right? China Built the World’s Largest Telescope, But Has No One to Run It Aren't conspiracy theories fun? 2 1 "It has just been discovered that research causes cancer in rats."
Gfted1 Posted December 4, 2020 Posted December 4, 2020 Scientists just mapped 1 million new galaxies, in 300 hours. 2 "I'm your biggest fan, Ill follow you until you love me, Papa"
Chilloutman Posted December 8, 2020 Posted December 8, 2020 (edited) SpaceX SN8 rocket test should start soooon!! I am sure there will be big flaming ball in the end! Edited December 8, 2020 by Chilloutman 1 1 I'm the enemy, 'cause I like to think, I like to read. I'm into freedom of speech, and freedom of choice. I'm the kinda guy that likes to sit in a greasy spoon and wonder, "Gee, should I have the T-bone steak or the jumbo rack of barbecue ribs with the side-order of gravy fries?" I want high cholesterol! I wanna eat bacon, and butter, and buckets of cheese, okay?! I wanna smoke a Cuban cigar the size of Cincinnati in the non-smoking section! I wanna run naked through the street, with green Jell-O all over my body, reading Playboy magazine. Why? Because I suddenly may feel the need to, okay, pal? I've SEEN the future. Do you know what it is? It's a 47-year-old virgin sitting around in his beige pajamas, drinking a banana-broccoli shake, singing "I'm an Oscar Meyer Wiene"
Gorth Posted December 9, 2020 Posted December 9, 2020 On 12/4/2020 at 8:50 AM, rjshae said: Drone footage shows the shocking collapse of the Arecibo Observatory Now if I were really, really paranoid, I might suspect that the CCP had sabotaged Arecibo just to get scientists to start using FAST (Five-Hundred-Meter Aperture Spherical Radio Telescope). But that would just be crazy thinking. Right? China Built the World’s Largest Telescope, But Has No One to Run It Aren't conspiracy theories fun? I hate to ruin a good conspiracy theory, but the Arecibo observatory had already been decommissioned and closed for a while. It was scheduled for demolition when the collapse happened. More likely because it didn't get any maintenance after its closure? “He who joyfully marches to music in rank and file has already earned my contempt. He has been given a large brain by mistake, since for him the spinal cord would surely suffice.” - Albert Einstein
Zoraptor Posted December 9, 2020 Posted December 9, 2020 IIRC it was the other way around. It became dangerous, then got shut down because the repairs needed- cable replacement- had gone too far to be done safely/ economically. (Having checked wiki it was only decommissioned a few weeks before the collapse, and two cables needed replacing) 1
rjshae Posted December 10, 2020 Posted December 10, 2020 Mars colony is off to a bit of a rocky start... 1 "It has just been discovered that research causes cancer in rats."
Lexx Posted December 10, 2020 Posted December 10, 2020 (edited) What do you mean with rocky start? This was awesome. Nobody expected it'll get this far. They almost nailed it on the first try ever with something that was never tried before. Let them fix the engine issues and there we go. SN9 is already build, so the next test won't be far away off either. Super exciting. /Edit: I'm browsing the news and ofc so many people are laughing and saying the mission is a failure ... completely missing the point of that test. Seeing this ignorance makes my blood boil, seriously. This test was a huge success. Except for the landing and the mid-flight engine failures, everything worked. The rocket took off, made it high, managed to flip itself to the side, glide down, get back up and slow down for the landing. I'm pretty sure the results would have been even better if the 3rd raptor would have kept working. Falcon 9 crashed many times before they nailed the landing, and now everyone is taking for granted that we shoot rockets into space and have them come back to the landing pad completely unharmed. This is not something we're doing since ever, this is super fresh tech. Hell, going by the speed of things, I'm very certain we'll see a perfect starship landing in the next couple months. Edited December 10, 2020 by Lexx 2 "only when you no-life you can exist forever, because what does not live cannot die."
Hurlshort Posted December 10, 2020 Posted December 10, 2020 (edited) The landing isn't even the point. They just need to get it into space. You don't pull giant cruise ships onto the beach. Edited December 10, 2020 by Hurlshot
Gfted1 Posted December 10, 2020 Posted December 10, 2020 @Hurlshot Its part of the point. Starship's are envisioned to land directly on the moon and Mars. @Lexx Were those engine failures? I watched the entire video and they seems to be turning off and on in a certain sequence. 1 "I'm your biggest fan, Ill follow you until you love me, Papa"
Lexx Posted December 10, 2020 Posted December 10, 2020 (edited) No engine failures. As we know now, they were turned off on purpose, even the first one. Then they made SN8 hover a bit in the sky to burn off fuel and then flipped it to get down to the landing pad. The reason why the landing failed is because there was not enough pressure in the header tank. Basically everything worked except for the landing. Big success. Edited December 10, 2020 by Lexx 2 "only when you no-life you can exist forever, because what does not live cannot die."
rjshae Posted December 12, 2020 Posted December 12, 2020 On 12/10/2020 at 8:23 AM, Lexx said: No engine failures. As we know now, they were turned off on purpose, even the first one. Then they made SN8 hover a bit in the sky to burn off fuel and then flipped it to get down to the landing pad. The reason why the landing failed is because there was not enough pressure in the header tank. Basically everything worked except for the landing. Big success. I'm sure everybody who watched that will be queued up for a trip. "It has just been discovered that research causes cancer in rats."
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