William Clark

1.8K posts

William Clark

William Clark

@AgeHasWisdom

I have been around the block a time or two. Technical IT SME, husband, father, and a no-nonsense conservative.

เข้าร่วม Mayıs 2017
147 กำลังติดตาม71 ผู้ติดตาม
Todi
Todi@todimugivhi·
Today's episode of "the dumbest shit you see on the internet"
Erika @ExploreCosmos_

When a spacecraft leaves Earth, it doesn’t just fire its engines and head straight to its destination. In many missions, especially those going beyond low Earth orbit, there’s a more subtle and elegant strategy at play, one that uses gravity itself as part of the navigation system. This is often called a gravity assist, or a slingshot maneuver. But in the case of missions like #Artemis II, what’s being used is a closely related idea known as a free-return trajectory. At first glance, it might sound simple: the spacecraft goes to the Moon, loops around it, and comes back. But the physics behind it is anything but simple. Instead of relying on continuous propulsion, the spacecraft follows a carefully calculated path through the gravitational field of the Earth–Moon system. It is launched with just the right speed and direction so that, as it approaches the Moon, the Moon’s gravity bends its trajectory. The spacecraft is effectively flung around the Moon, redirected onto a path that naturally brings it back toward Earth. No major engine burn is needed for the return. Small trajectory corrections may still be required, but gravity does the heavy lifting. That’s the key. This kind of trajectory is not just efficient, it’s also safe. If something goes wrong with the spacecraft’s engines or onboard systems, gravity itself ensures the return. It’s an inherent backup plan, built into the trajectory from the very beginning. The same fundamental idea appears in gravity assists used across the Solar System. When a spacecraft flies past a planet, it can gain or lose speed by exchanging momentum with that planet. From the spacecraft’s point of view, it’s as if it has been accelerated without using fuel. In reality, it has borrowed a tiny amount of orbital energy from the planet itself. That’s how missions like Voyager reached the outer planets, and how probes continue to explore regions far beyond what their onboard fuel alone would allow. But there’s an important distinction. An interplanetary gravity assist is typically used to change speed and direction, often increasing the spacecraft’s energy. A free-return trajectory, like the one used in Artemis II, is designed for something more specific: a path that naturally loops back to Earth without requiring additional propulsion. It’s less about gaining energy, and more about shaping a trajectory that guarantees a return. To understand why this works, it helps to stop thinking in straight lines. In space, motion follows curves defined by gravity. The spacecraft is constantly falling, first toward Earth, then toward the Moon, and then back toward Earth again. What looks like a loop is really a continuous free fall through a changing gravitational landscape. This way of navigating space reveals something deeper. We tend to think of engines as the drivers of motion, but once a spacecraft is on its way, gravity does most of the work. The art of spaceflight is not just about thrust. It’s about knowing when not to use it. #GoodLuck #Artemis @NASAArtemis

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Thrilla the Gorilla
Thrilla the Gorilla@ThrillaRilla369·
Why do people that can make Gravy from scratch think they better than everybody
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Science girl
Science girl@sciencegirl·
Isaac Newton’s cannonball thought experiment shows that orbit is continuous freefall. Objects like the International Space Station fall toward Earth but move forward fast enough to keep missing it as the planet curves away—creating orbit.
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William Clark
William Clark@AgeHasWisdom·
@mamboitaliano__ Or, it was named after my daughter’s dog. Awesome GS. Who cares why that name was chosen?
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Mambo Italiano
Mambo Italiano@mamboitaliano__·
For those who may not know or are curious Why is the program called “Artemis”? 🏹✨ • In Greek mythology, Artemis (known as Diana to the Romans) is the goddess of the Moon, the hunt, the wild, and untamed nature She is the twin sister of Apollo, the god of the Sun • The Apollo program of the 1960s–70, the one that landed on the Moon, was named after Apollo himself. Choosing Artemis as its successor is a poetic and symbolic gesture: the twin sister of Apollo now leads humanity back to the Moon, marking a new era of exploration and discovery • NASA announced the name in 2019 precisely for this mythological resonance: Artemis embodies humanity’s return to the Moon in the 21st century, a new chapter driven by ambition, unity, and the enduring pull of the unknown 💫
Mambo Italiano tweet media
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Black Hole
Black Hole@konstructivizm·
Voyager 1, launched in 1977, will reach 1 light-day from Earth this year in November. Voyager 1 has been flying for nearly 50 years at 38,000 mph. One light day means radio signals traveling at the speed of light take 24 hours to reach it. When engineers send a command to Voyager 1, they wait two full days for a response one day out, one day back. Voyager 1 was launched in 1977 powered by a plutonium RTG that generates roughly 4 watts of usable power today less than an LED bulb. On that power budget it is transmitting data across 24 light hours of interstellar space to a 70 meter antenna on Earth. It has now traveled farther from Earth than any human made object in history, moving at 17km per second, and it still calls home every day. The most distant thing humanity has ever touched is a 47 year-old spacecraft running on 4 watts, and we can still hear it.
Black Hole tweet media
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Slim
Slim@onu_slim·
If your parents are 65 and above, please listen. They are not going to tell you they are running out of time. That is not how they were built. They will wave you off, say they are fine, tell you not to worry, because they spent a lifetime protecting you from hard truths and they are still doing it now. But time is not asking their permission. Look closely the next time you see them, really look. The hands that once seemed so capable, the voice that used to fill a room, the eyes that still light up the moment you walk in, because you walking in is still, after all these years, one of the best parts of their day. You are so busy becoming while they are quietly diminishing, and both things are happening at the same time and nobody talks about it. The repeated stories are not a malfunction. They are what mattered most to them, they are trying to pass something to you before they go, so receive it. One day you will be mid-sentence and suddenly remember the exact way they laughed, and it will stop you cold, and you would trade almost anything to hear it one more time in real time, not just in memory. That day is coming, you do not know when. So call, not when you have time, because you do not have time, nobody does, but call anyway, visit anyway, sit in the quiet with them and let it mean something. Give them your presence while they can still feel it, not later. Now.
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Zoltan
Zoltan@ZoltanSEC·
When a database is leaked its usually only the hashed response to the password, not the actual password. So they will run offline brute force attacks on the hash. The longer and more complex the password, harder it is to crash the hash. Most wont even try on hashes longer then 8-10 chars because its exponentially harder
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Gandalv
Gandalv@Microinteracti1·
That sigh your dog just did? It’s 16,000 years old. Two studies published this week in Nature pushed back the genetic record of dog domestication by 5,000 years, detaching it entirely from the story of farming. The humans who first lived with dogs had no fields, no livestock, no permanent address. They were ice-age nomads, moving constantly across a frozen continent, and they had dogs with them anyway. Not for agriculture. Not for herding. Just because somewhere along the way, a wolf that wasn’t quite a wolf anymore sat down next to a human fire and stayed. The particular way your dog presses against your leg when something feels wrong, positions itself with a sightline to the door, watches you without watching you – that’s not a quirk. That’s a collaboration 16,000 years in the making, running without interruption through every plague, empire, and revolution since. Dogs are great. I love my dog. 🐕 Gandalv / @Microinteracti1
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Open Source Intel
Open Source Intel@Osint613·
Two new posts made by the White House:
Open Source Intel tweet mediaOpen Source Intel tweet media
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Massimo
Massimo@Rainmaker1973·
In a world where artificial intelligence can replicate a person’s voice or face in seconds, Denmark is stepping forward with a groundbreaking proposal: a copyright law that grants every citizen ownership of their own likeness. If passed, this law would mean no one — not even AI companies — could legally use your face, voice, or body data without consent. The move comes amid growing global concerns about deepfakes, where digital replicas of real people are used in scams, misinformation, and even political manipulation.
Massimo tweet media
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Interesting AF
Interesting AF@interesting_aIl·
Can’t wait to forget this when I actually need it
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parks
parks@parkersity_9·
Charging a fee to pay a bill online when there isn't a way to pay in person or with cash is a scam.
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Slim
Slim@onu_slim·
The Day Your Parents Stop Being Your Parents Let me say this….Most people don’t realize this until it’s too late. Your parents are slowly becoming human. Not “Dad the provider” or “Mum the protector” but simply two people getting tired, getting older, and getting quieter with time. The same people who once carried you like you were the most important thing in the world will one day start hiding their pain so they don’t become your burden. There will be a day your father repeats the same story, because time is slowly taking things from him. There will be a day your mother calls you just to hear your voice, because loneliness has started sitting beside her. And the painful part is this….. You will be busy……Busy building your life, chasing money, trying to become someone. Meanwhile, the people who made you someone are quietly fading into the background of your life. We talk a lot about leaving home and becoming independent, but nobody tells you this truth. Independence should never mean emotional distance. Growing up should not mean growing away. Call them now…..visit them also sit with them without rushing. Because one day, you won’t be managing your time around them anymore. You will be wishing for one more conversation you didn’t think mattered. Just thought of telling you guys this
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William Clark รีทวีตแล้ว
Raz_Games 🏳️‍🌈🇵🇸
My first EVER Loremaster of an expansion. I've changed how I play WoW in Midnight. I'm playing the game for ME and not anyone else. I'm engaging with the content how *I* want. In the past I unfortunately let people dictate how I spend my time in the game, but no more.
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Miss Ally
Miss Ally@MissAlly_01·
Does anyone actually know where the middle of nowhere is?
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Alexandra Marshall
Alexandra Marshall@ellymelly·
Curious. When was the last time you picked up a real pen and wrote something on a piece of paper???
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Ron wright
Ron wright@ronsterd89·
another word for dumb... but you can't say "stupid..
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William Clark
William Clark@AgeHasWisdom·
@Osint613 Love these summaries. Good work. Keep them coming.
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Open Source Intel
Open Source Intel@Osint613·
News from the weekend 👇🏻 Israel Hits 200 Targets Across Iran Israeli aircraft struck ballistic missile launchers, air defense systems, and weapons storage facilities across western and central Iran in a major wave of attacks. Hormuz Shipping Traffic Collapses Only 77 ships crossed the Strait of Hormuz in early March compared with more than 1,200 in the same period last year as conflict spreads across the Gulf. Iran Missiles Hit Central and Southern Israel Cluster warheads damaged buildings and roads in Shoham and Rishon Lezion. In Eilat, 3 people were injured including a 12 year old boy. U.S. Deploys 2,200 Marines to Middle East The 31st Marine Expeditionary Unit with F35 aircraft and MV22 Ospreys has been ordered from Japan to the region. Explosion Hits Jewish School in Amsterdam An overnight blast outside a Jewish school prompted Israel to warn of rising antisemitism in the Netherlands. No injuries were reported. Two Senior Iranian Intelligence Chiefs Eliminated Abdollah Jalali Nasab and Amir Shariat were killed in a strike in Tehran. Both were senior figures in Iran’s Khatam al Anbiya emergency command. Drone Attack Disrupts Fujairah Port Operations A drone strike and fire at Fujairah port in the UAE temporarily halted some oil loading operations. Hezbollah Signals Long War With Israel Leader Qassem said Hezbollah is preparing for a prolonged confrontation and warned Israel it will face surprises on the battlefield. U.S. Embassy Baghdad Helipad Struck A missile hit the helipad inside the U.S. Embassy compound in Baghdad, sending smoke rising over the facility. IAF Jet Nearly Downed Over Iran An Israeli fighter jet narrowly avoided being shot down during a mission over Iran. The pilot completed the mission safely. Pahlavi Declares Readiness to Lead Post Regime Iran Exiled crown prince Reza Pahlavi said he is ready to lead a transitional government after the fall of the Islamic Republic. Evacuation Orders Issued for Beirut’s Dahiyeh Israel warned residents to evacuate Hezbollah strongholds in Beirut’s southern suburbs ahead of further strikes. Turkey Intercepts Iranian Ballistic Missile Turkey confirmed intercepting a missile that entered its airspace and said it will avoid being drawn into the war. Iran Damages USAF Tankers in Saudi Arabia Five U.S. Air Force refueling aircraft were damaged in a missile strike on Prince Sultan Air Base. No casualties were reported. IDF Expands Strikes on Hezbollah Targets More than 110 Hezbollah command centers have been struck in Lebanon since the escalation began. U.S. Strikes Kharg Island Oil Hub U.S. forces targeted more than 90 military sites on Kharg Island, the terminal that handles most of Iran’s oil exports. UN Warns Hormuz Closure Threatens Global Aid The UN said a shutdown of the Strait of Hormuz would disrupt global deliveries of food, medicine, and fertilizer. President Trump Signals Iran War Still Ongoing President Trump said the war will end when he “feels it in his bones” and claimed Iran is seeking a deal. Iran Arrests Dozens Amid Internet Blackout Authorities detained 54 people linked to opposition figures and arrested others accused of spying for Israel and the U.S. Diplomatic Push Begins on Hormuz and Ceasefire France and several partners are exploring a naval coalition to escort tankers through the Strait of Hormuz. 84 Iranian Sailors Repatriated After Warship Sinking The bodies of sailors killed when the warship IRIS Dena was sunk by a U.S. submarine were flown home from Sri Lanka. Qatar Activates Emergency Reserves and Evacuations Qatar says water reserves can last 4 months and food supplies 18 months as precautionary evacuations begin. IRGC Quds Force Commander Killed in Lebanon Hisham Abd al Karim Yassin, who oversaw Hezbollah communications networks, was killed in an Israeli strike. Israel Strikes Iran Space Research Center Israel targeted Iran’s main space research facility, saying it was used to develop military surveillance satellites.
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Jim
Jim@JVMonte2·
Who was on stage the FIRST time you were at a concert?
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