Astrophysics

Join the Bitcoin District Book Club! We meet every month to explore new and exciting rabbit holes by reading books that are popular with bitcoiners. Join us for a deep dive into End Times: Elites, Counter-Elites, and the Path of Political Disintegration by Peter Turchin. In this thought-provoking session, we’ll explore the structural forces that have historically led to societal instability—and why Turchin believes we are entering such a period today. Drawing on his work in “cliodynamics” (the quantitative study of history), Turchin examines cycles of rising inequality, elite overproduction, and political fragmentation. We’ll discuss how internal competition among elites and growing public discontent have repeatedly destabilized societies—from ancient Rome to modern America—and what this might mean for the decades ahead. For those interested in macro trends, power structures, and long-term societal patterns, this book offers a compelling framework for understanding today’s increasingly chaotic world. Buy the book on [Amazon](https://a.co/d/097mab73) **Event Notes:** * Discussion Starters: We’ll kick things off with a few key questions around elite dynamics and societal cycles, but feel free to bring your own perspectives. * Future Reads: Let us know if you have recommendations for future book club selections! We’ll add them to the list posted on our website. * Afterwards: Feel free to join us at Pubkey after the meeting to hang out, continue the conversation, and grab some food! **Getting There:** * 🔴🟢🟡 Gallery Place/Chinatown + 2 min walk * Parking: Street & garage parking available nearby

Business Oriented Toastmasters (BOTM) is an exceptionally strong Toastmasters club in Rockville, MD. Our club has earned President's Distinguished Club status for the last thirteen years in a row. We are dedicated to helping each of our members achieve their personal public speaking and leadership goals in a friendly, supportive environment. We pride ourselves on having organized, professional meetings with strong evaluations, while having fun at the same time. Guests are always welcome and no notice is necessary. Just show up and plan to have fun. See how BOTM can help you achieve your goals. We are a diverse club with both seasoned and new Toastmasters, and all ethnic and professional backgrounds. For more information, please visit our website at botm.toastmastersclubs.org or contact us at contact-2279@toastmastersclubs.org Meeting locations: 1st Wednesday of every month in person at Faith United Methodist Church, 6810 Montrose Road, Rockville, MD 3rd Wednesday of every month via Zoom

• What we'll do On https://blackecon101.podbean.com/ Thursdays at 6 pm. discussing the economy....

We are the Federal Center Toastmasters Club. We meet the 1st, 3rd, and 5th Thursday of each month in Hyattsville, MD, from 12 noon to 1pm. Our meetings are held at the headquarters of the CDC’s National Center for Health Statistics of the CDC. Our meetings are open to the public, though visitors must go through building security procedures. For visitors who are not U.S. citizens, we do need to pre-coordinate a first visit with our security team. Contact us at: 1260@toastmastersclubs.org. We have been a Toastmasters Club for 40 years and always welcome new members! Join us, and you will improve your public-speaking and leadership skills in a friendly, supportive atmosphere!

Trivia!! Trivia starts promptly at 7, come earlier to get set up 630-645. Clear Sky's Meadery. 15201 Display Ct, Rockville, MD 20850

AfropolitanDC Presents: The Borderless Black Diaspora Experience \| Thursday April 16th \| World Bank Spring Meetings Editions RSVP Now At: [AfropolitanDC](https://AFPDC2604.eventbrite.com/?aff=MU) Get ready for another amazing night of connections and culture over cocktails Join us for AfropolitanDC: Industry Night—a premier cultural mixer and one of the most anticipated social experiences on the sidelines of the Worldbank Spring Meetings DMV’s largest cultural mixer returns with The Borderless Black Diaspora Experience—a celebration of global Black unity, identity, and culture. From New York to Accra, Kingston to Lagos, and Washington D.C., the Black experience knows no borders—only shared rhythms, roots, and brilliance. This is the spring meetings social social where global leaders, entrepreneurs, creatives, and policymakers converge to network, celebrate, and reimagine the future of a borderless Black diaspora. Designed to harness the convergence of global and local influence during spring meetings week, this evening fosters collaboration and partnership across the diaspora while showcasing its vibrant culture. What to Expect Power Networking with global leaders, professionals, and innovators Afro-Caribbean Social & Party with top DJs and vibrant diaspora sounds Red Carpet Experience to capture your spring meeting's night in style Cocktails & Culture featuring Afro-Caribbean bites and curated drinks Borderless Connections Mixer with interactive networking and idea-sharing

There’s a beautiful outdoor beer garden in the heart of Del Ray. Let’s take advantage of the nice mild weather this week and try something new. I’ll bring a few social games that aren’t packed yet if anyone wants to play, or just come make some new friends and unwind. Friendly pups are welcome too!

The Astronomical Society of Greenbelt will hold a star party at the Greenbelt Observatory near Northway Fields on Saturday, April 18 from 9:00 to 11:00 PM. The event is free and open to the public. Visitors can come in to the observatory dome to watch the telescope operators or bring their own telescopes. The event will be cancelled if it’s clouded over or raining. All are welcome. Children should be accompanied by a parent or guardian.

Title: Potential Applications of Negative Radiation Pressure in Astronomy, Medicine and 2WQC Date: April 19 2026 10:00 am - Noon EDT (16:00 - 18:00 CET) Abstract: While we are used to heating and pushing with light, there is also optical cooling and pulling. I will talk about negative radiation pressure, potential ways to generate it, and its novel applications, like non-ionizing medical scanners, 2WQC (two-way quantum computers) in theory solving NP problems, also potential astronomical sources and their observation. Speaker: Dr Jarek Duda is an assistant professor at Jagiellonian University. He holds degrees in computer science (PhD), mathematics (MSc) and physics (PhD). He is mainly focused on physics foundations, information theory, statistical analysis, and is known for introduction of asymmetric numeral systems.

Arlington has a planetarium called the David M Brown Planetarium. I forget about it all the time. They host a monthly event. This month's starts at 7:30pm on April 18. Let's meet up at Quincy Hall beforehand and get buzzed before we learn about the Solar System. Tickets to the planetarium show are $5. They can be bought at the door and online. The online ones aren't available yet but I'll post a link when they are. The David M Brown Planetarium is at 1426 N Quincy St, Arlington, VA 22207 right around the corner from Quincy Hall. The show is called Dynamic Earth: https://friendsoftheplanetarium.org/event-6339264

Title: Foundations of Localized Symmetry Mathematics Date: April 18 2026 Noon - 14:00 EST Summary: The moment you use Euclid’s definitions of points and distances in any of your mathematical axioms, all that follows is assured to produce some level of nonsensical results when applied to the foundations of physics. The reason is not complicated: Euclid’s definitions are deeply mired in accepting as a “given” the very concepts that emerge only in well-defined inertial frames, which in turn are local instances of symmetries that are always finite and context dependent. In this talk, Terry will discuss how reframing mathematics in terms of symmetries that, as in the real world, are finite, composite, and dependent on self-observation (acceleration), results in a richer and far stranger set of mathematics in absolute conservation of quantum numbers generate local and global symmetries — the opposite of Noether’s theorem — that in turn create the emergent classical phenomenal such a particles, fields, space, and time. Speaker: Terry Bollinger is a computer scientist with BS, MS, and professional degrees from the Missouri University of Science and Technology.

Every Sunday afternoon before church, one of the Covenant Life Church prophetess' hosts a prophetic training class that activates participants in the Gifts of the Holy Spirit. During this class, participants will be provided opportunity to be taught how to use the Gifts of the Holy Spirit and will have opportunity to ask questions and talk with someone who has been used in the Gifts during ministry. Teaching is provided on the gifts with emphasis on the Gift of the Prophecy. A combination of lecture and experiential learning is employed to teach, guide and instruct the participants. Everyone is welcome, all classes are free. Childcare is not provided.

**Join us in Falls Church for conversations that go beyond small talk.** Higher Grounds – Falls Church is where this growing network of gatherings began: a space for thoughtful, authentic dialogue about what matters most. Whether we’re exploring the nature of happiness, the challenges and possibilities of midlife, spirituality, culture, capitalism, parenting, or the role of art and travel in a meaningful life, every conversation is shaped by the people in the room. There’s no set leader or rigid agenda—just a shared commitment to listen as much as we speak. We start with brief introductions focused on what makes you *you* (not your LinkedIn bio), then dive straight into whatever is on people’s minds. The direction of each meetup emerges organically, making every event unique. MANDATORY: PLEASE REVIEW OUR COMMUNITY GUIDELINES IN THE GROUP DESCRIPTION. Everyone is expected to engage in respectful conversations and listen deeply as well as share. We have a zero tolerance policy of sexual harassment and hate speech. Come ready to share, reflect, and connect with others in Falls Church who are also seeking deeper conversations. **Suggested Questions: Life Stages & Transitions** 1. What did you think you'd have figured out by now that you're still completely winging? 2. When did you realize your parents' advice was for a world that no longer exists? 3. What are you finally old enough to stop pretending to care about? **Suggested Questions: Identity After the Roles** 1. Who are you when nobody needs anything from you? 2. What dream keeps resurfacing even though the "practical" time has passed? 3. How do you handle having the freedom you always said you wanted? **Suggested Questions: AI & Being Human** 1. What human experiences will AI never truly understand? 2. If machines handled all your have-to's, what would you actually do? 3. What becomes more precious as everything becomes automated? **Suggested Questions: Belief & Meaning** 1. What certainties have you given up, and what rushed in to fill that space? 2. How has knowing someone who died changed how you live? 3. What do you believe now that would shock your younger self? **Suggested Questions: The Modern Psyche** 1. What anxiety do you carry that previous generations didn't have? 2. Which of your survival strategies are you ready to retire? 3. What uncomfortable truth about happiness did it take you years to accept? **Suggested Questions: Work & Purpose** 1. When did you stop believing that your job would complete you? 2. What would you do for work if money and status weren't factors? 3. How has your definition of "making it" changed over the years? **Suggested Questions: Relationships & Connection** 1. What relationship dynamic do you keep recreating, and why? 2. When did you realize your parents were just people trying their best? 3. What kind of loneliness doesn't go away even when you're with others? **Suggested Questions: Time & Mortality** 1. What are you running out of time to say or do? 2. How differently do you spend your time knowing it's finite? 3. What will you regret not trying, even if you fail? **Suggested Questions: Society & Culture** 1. What social convention do you follow even though it makes no sense? 2. Which generation do you understand least, and what might you be missing? 3. What aspect of how we live now will seem insane in 20 years? **Suggested Questions: Personal Philosophy** 1. What rule for life did you create after learning something the hard way? 2. When did you stop believing that everyone else had it figured out 3. What paradox about life have you learned to live with?

Looking forward to seeing you! Please know that you don't have a reserved spot until you register at [Eventbrite](https://www.eventbrite.com/e/speed-dating-for-autistic-adults-tickets-1982622638683?aff=oddtdtcreator&fbclid=IwY2xjawP1rHJleHRuA2FlbQIxMQBzcnRjBmFwcF9pZBAyMjIwMzkxNzg4MjAwODkyAAEe09Q_4uRXeVchWzuAfDhgFlwnANLaOOKGr1stjbTaw5QD9gQXLos5IOBPUQs_aem_XUyVMTIlkYCPy8pVfz533Q) and purchase your ticket. Limited tickets available. Join us for a supportive, structured Speed Dating event for autistic adults (ages 25 to 40) on Sunday, April 19, 2026, from 2:00 to 4:00pm in Bethesda, MD (address provided after registration). This facilitated event is designed for heterosexual pairings and offers a welcoming, low-pressure environment to meet potential partners. Light refreshments will be provided. Registration is $35 on our website and free for our **[Constellations](https://www.harringtonmatchmaking.com/constellations-membership)** members.

Sleep in on Sundays. When you've had your fill of pajama-time, roll out and have some tasty brunch with your fellow Humanists!

Join the CONNECTED Westerville Mastermind Group for a dynamic afternoon of B2B networking! This event is perfect for professionals looking to expand their business connections, share insights, and foster collaboration within the community. Whether you are a seasoned entrepreneur or just starting out, this event offers a valuable opportunity to exchange ideas, build relationships, and grow your network in a supportive environment. Connect with like-minded individuals, explore potential partnerships, and discover new opportunities for professional growth. Don't miss out on this chance to enhance your business network and take your career to the next level with CONNECTED Westerville Mastermind Group! We meet the 4th Monday of every month from 11am-1pm. Welcome and general networking from 11am - 11:30am with core meeting 11;30 - 12:30 and a final round of networking from 12:30 - 1pm.

ASH is Atheists, Skeptics and Humanists of First Unitarian Universalists of Columbus Ohio TBD Snacks are usually available, and you are welcome to bringing something to share!

## Unlock the Power of Prediction: Polymarket Masterclass Ever felt like you could foresee the future? Now, put those insights to work. Join us for a deep dive into Polymarket, the prediction market platform, and learn how to turn your knowledge of current events into real opportunities. It's more than just guessing; it's about strategic analysis, risk management, and capitalizing on market inefficiencies. ### Is this workshop for you? This session is tailored for: * Those brand new to prediction markets and ready to learn the ropes. * Sharp minds that enjoy analyzing data and making calculated decisions. * Individuals with a passion for news and current affairs, looking to leverage their insights. * Anyone seeking alternative income streams powered by event analysis. ### What's on the agenda? During our time together, we'll cover: * Demystifying Polymarket: From initial setup to executing your first prediction. * Essential risk management techniques to protect your investments. * Decoding market signals and understanding liquidity dynamics. * Tactics for identifying and exploiting market mispricings. * Constructing a robust portfolio for consistent gains. * Inspiring examples of successful Polymarket strategies put in motion. _"The instruction was clear, the advice was practical, and the techniques were actionable. I've already made back my registration fee!"_ - Recent participant ### Secure Your Spot – Full Registration Required! Spaces are limited, so don't miss out. RSVPing "yes" on Meetup **does not** confirm your spot. You **must** complete the official registration using the link below: ### [✅ Claim Your Seat! ✅](https://remoteready.io/product/Polymarket?city=Columbus&groupurlname=circle-of-professionals-mastering-ai-income&startgmtdatetime=2026-04-17T22:00:00Z) Let's transform your knack for predictions into a powerful income stream! Register now.

Let’s meet and share our thoughts about Carson McCullers’ novella, The Ballad of The Sad Café.

# Ride the AI Influencer Wave Forget fleeting fame. Virtual influencers are the future, a digital goldmine ripe for the taking. Seriously. **Want in?** Craft a unique AI persona, master photorealistic content, and build a loyal following across Instagram and TikTok. We'll show you how to monetize it all with sponsorships, affiliate marketing, and your own digital products. **Skip the RSVP, grab your spot:** [🚀 REGISTER NOW 🚀](https://remoteready.io/product/AiInfluencer?city=Columbus&groupurlname=circle-of-professionals-mastering-ai-income&startgmtdatetime=2026-04-17T22:00:00Z) --- ## This is for you if... * You're even slightly curious about virtual influencers. * You have interest in AI image/video generation (big plus). * You're at ground zero with no social media experience – perfect! * You're a marketer itching to tap new revenue channels. ## Unlocking the Blueprint: You'll discover: * The art of designing authentic AI personalities with magnetic backstories. * How to scale from a single influencer to a thriving portfolio. * Content calendar mastery and post automation for maximum reach. * Real-world examples: AI earners making $3K–$30K monthly. ## Level up your creator game! *"I didn't believe in virtual influencers at first. Now my AI gets 50K followers."* – Verified Creator Monetize imagination. 💰 Let's build a non-stop earnings engine. ✨

Who else is ready to sit outside? Join us for a casual chat over coffee & tea at Grandview Grind! Come out and meet some new people, enjoy your favorite drink, and make some new friends!