Astrophysics

Twenty years ago, George Mason University professor Zachary Schrag published the definitive history of the Washington Metro: "The Great Society Subway". With the 50th anniversary of the system coming up at the end of March, TEDC founder Will Rice will make a presentation based on the book. Many elements and conflicts combined to create the Metrorail we now enjoy: a trust in big government projects; the battle over urban highways; the emerging D.C. home rule movement; Black-white relations; and the balance of city and suburban interests. Come learn more about it all! Also at the meeting: pick up your pre-ordered Metro 50 t-shirt (for new purchases, an order form is [here](https://transitenthusiastsdc.wordpress.com/wp-content/uploads/2026/01/t-shirt-order-form.pdf)). And hear the latest news on how we plan to celebrate the system's golden anniversary on March 27!

Join us at Prefect to talk about Context Engineering and Data Engineering for AI! Please RSVP on luma for headcount purposes! https://luma.com/l1epj9r3 \-\-\- Data Engineers DC is a professional group that meets monthly to discuss topics including all things related to Data Engineering such as open data, data gathering, data munging, and the creation, storage and maintenance of datasets. We combine presentations with hands-on workshops, always seeking to make our data munging lives easier. \-\-\- Location: Prefect - **2112 Pennsylvania Avenue NW** **Washington, DC 20037** Note: **Bring a photo ID**, as these are required by building security. Agenda: 5:30-6:15pm: Food & Networking 6:16-6:30pm: Introductions 6:30-7:00pm \-\-\- Data Engineers DC is a program of DC2. Learn more at www.dc2.org \-\-\- Sign up to give a 5 minute micro-presentation! https://forms.gle/8YSBJr5LGsfr3qKMA Fun meetup syntax bug: Link: https://forms.gle/8YSBJr5LGsfr3qKMA Text formatted as a link: [link](https://forms.gle/8YSBJr5LGsfr3qKMA) Link formatted as a link: [https://forms.gle/8YSBJr5LGsfr3qKMA](https://forms.gle/8YSBJr5LGsfr3qKMA) (Data processing is hard. If you've found bugs like this in your pipeline, sign up using the above link to talk about it for five minutes!)

We'll use this time to meet new GRASP members and catch up with those we already know! Look for GRASP table flyers and Eli's GRASP shirt to easily find the group. This restaurant is a fast-casual format meaning it's easy to order and pay individually! Adult beverages are available and you can expect entrees in the $15 range. The [Torchy's Tacos menu is here](https://torchystacos.com/menu/) and they offer a wide variety of tacos, burritos, salads, and excellent sides. In living by their Damn Good mantra, they’re constantly innovating to ensure they’re delivering the tastiest tacos, queso, and margaritas in the game. Their Taco of the Month promotions allow them to provide unique tacos to Taco Junkies year 'round. The ingredients make the meal. That’s why they responsibly and ethically source every single ingredient, down to the jalapeño. From there, they work hard to whip up the best damn tacos, cooked to order, just the way you like 'em.

This popular and accomplished Toastmasters club (#4787) is open to everyone, with an average of 25 people per meeting, mainly business professionals from the Reston/Herndon area. Meetings are held on the 1st, 3rd and 5th Tuesdays of the month from 6pm to 7pm at 2310 Colts Neck Rd, Reston, VA 20191. Some of the group's members are accomplished professional speakers, while others are just starting down their path of improved public speaking, including many non-native English speakers. Whether you're just starting out and looking to improve your speaking or overcome some nervousness...or looking to gain connections and sharpen your skills, you'll feel connected with the members of Reston Town Center Toastmasters. Stop by. Check us out! Chances are you'll like us so much that you'll be back! For more information: http://towncentertoastmasters.toastmastersclubs.org/

Let's play Pour House Trivia at a great venue - Nighthawk Brewery! Besides being able to get some great beer, this place also sells good pizza in two different styles! Nighthawk is conveniently located in the Pentagon Row development in Pentagon City (Arlington). Parking is available at an adjacent garage right near the venue. Nighthawk is also accessible from the Pentagon City Metro station. The game starts at 7:00, but please try to arrive 15 minutes early to find us and get settled in. See you there!

🌟 You're Invited! 🌟 Debedeavon Toastmasters Club Meeting 📍 Eastern Shore Library\, 24313 Bennett St\, Parksley\, Virginia 🗓 Monday\, October 7th \| 6:00–7:00 PM 💻 Join in person or online via Zoom\! Why Attend? ✨ Discover how Toastmasters can help you: · Speak confidently in public · Improve communication & listening skills · Grow your leadership abilities in a friendly, supportive environment ✅ Free & Open to the Public! No experience needed — just bring your curiosity and enthusiasm! 📧 Need the Zoom link or have questions? Reach out to: • David Smith, Club President 📩 President-750767@toastmastersclubs.org • Terri Patterson, VP of Education 📩 VPE-750767@toastmastersclubs.org

[Profs and Pints DC](https://www.profsandpints.com/washingtondc) presents: **“Trump, Your Rights, and Resistance,”** an overview of the legal landscape in the District of Columbia just over one year into Donald Trump’s second administration, with Scott Michelman, legal director of the ACLU of D.C. and lecturer on law and Shikes Fellow in Civil Liberties and Civil Rights at Harvard Law School. [Advance tickets: $13.50 plus sales tax and processing fees. Available at [https://events.ticketleap.com/tickets/profsandpints/dc-trump-rights-resistance](https://events.ticketleap.com/tickets/profsandpints/dc-trump-rights-resistance) ] Our nation looks a lot different just over a year after President Trump took office in January 2025. What has actually happened—and what does it mean for our rights? Get an informed breakdown on the civil rights and civil liberties issues that have defined the period since Trump's second inauguration with Scott Michelman, a legal scholar who last January gave an excellent talk on the legal guardrails potentially checking Trump’s actions. He’ll discuss what has been happening with immigration policy, criminal justice reform, domestic military deployment, discrimination, and threats to free speech. He’ll identify troubling patterns, explain where advocates have successfully pushed back in the courts, and outline the unresolved concerns ahead. The talk will also explore what individuals can do next, from understanding their rights to participating in elections that will shape the future of this administration and our country. (Door: $17, or $15 with a student ID. Listed time is for doors. The talk starts 30 minutes later.) Image: The October 18, 2025 “No Kings Day” protest in Washington D.C. (Photo by Geoff Livingston / Wikimedia Commons.)

Title: What Is Space Density? From Medium Ontology to the Spacetime Constant K Date: March 8 2026 10:00 am - Noon EDT Abstract: Spacetime plays an active role in gravity, wave propagation, and quantum behavior, yet physics rarely treats it as a physical medium with intrinsic properties such as density or inertia. This missing layer creates a major conceptual gap—especially when interpreting large-scale gravitational anomalies that are often attributed to dark matter. In this talk, Lynn will propose a clear conceptual framework for what it means for spacetime itself to possess a density-like property, and Lynn will explain why Unified Field Theory (UFT) naturally encodes this property through the constant K, called the spacetime background inertial intensity constant. Lynn will introduce a space-density constant μₛ as a universal property of space itself—independent of matter, energy density, or gravitational sourcing. However, μₛ cannot be inserted directly into field equations, because it belongs to the ontological level: it describes what space is, not how spacetime responds. To influence dynamics, μₛ must be expressed geometrically. This leads naturally to K, which carries the same physical meaning but operates at the level required by geometric field dynamics. This is a change in representation—not the addition of new physics. This approach provides an alternative way to interpret dark-matter-like effects. Instead of requiring unseen particles, gravitational anomalies can be viewed as consequences of spacetime’s intrinsic rigidity and its global, cumulative response in large coherent systems such as disk galaxies. In local, weak-field environments, standard Newtonian and relativistic gravity remains an effective approximation. The goal of the talk is not to present a final empirical model, but to clarify the physical meaning of spacetime constants and open discussion between UFT and mainstream theoretical physics. Keywords: Spacetime ontology; space density; intrinsic spacetime properties; Unified Field Theory (UFT); spacetime background constant K; geometric response; gravitational coupling; dark-matter-like phenomena Brief Biography Lynn Lou Beran is a Senior IT Security Analyst and an author, translator, and editor working at the intersection of science, engineering, and communication. She translated and edited multiple editions of Zhang XiangQian’s Unified Field Theory and co-authored recent manuscripts developing a geometric, motion-based view of physical reality. Lynn’s broader work focuses on making advanced ideas accessible without sacrificing rigor, and on connecting conceptual insight to testable predictions and practical tools.

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

Join PSW Science® on March 6 at 8 PM as we welcome Jonathan Coopersmith, Emeritus Professor of the History of Technology at Texas A&M University. During the question and answer period, in-person attendees and live stream viewers may ask the speaker questions, and in-person attendees may also engage with the speaker during the post-lecture reception. Refreshments are served. For more information on this meeting, please visit: https://pswscience.org/meeting/2532/ The meeting will be held in the John Wesley Powell Auditorium, adjacent to the Cosmos Club. The Powell Auditorium is located at 2170 Florida Avenue, NW Washington, DC 20008. Use of the Cosmos Club is restricted to the Powell Auditorium, the entryway to the auditorium, and the restrooms immediately outside the auditorium. Please note there is no onsite parking available. PSW Science, founded in 1871, is one of the oldest scientific societies in Washington D.C. Now, over 150 years later, we celebrate the Society's rich history and contributions to scientific discovery and cross-disciplinary collaboration. For information on how to become a member of PSW Science and membership benefits, please visit https://pswscience.org/join/

Shilohites Toastmasters meets every 2nd and 4th Sundays. Meetings start at 4:00 pm, and last one hour. We are a community club open to all. Parking is free. We focus on personal goals for professional development.

**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?

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!

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

Bring your Raspberry Pi, Arduino, microcontroller, or any other electronic project and join fellow electronics makers for a night of creativity and collaboration! This session is open forum to share your current projects—whether complete or in progress, it’s all interesting! Whether you’re deep into embedded systems, exploring new ideas, or just getting started, you’ll find a welcoming space to collaborate, share, and get inspired. **New to electronics or curious about tinkering?** You’re absolutely welcome. If you’re a beginner and want to experiment, I’ll have a couple of starter kits available so you can try things out—whether that’s blinking your first LED, putting something on a display, or experimenting with simple sensors. No pressure and no experience required—just an interest in learning and building. While we continue to pursue a more permanent venue for this Meetup, we’ll be using public library facilities based on availability. This session will be at the Worthington Park Library in the Olentangy Meeting Room.

The Humanist Monthly Program is our longest running event and still a community favorite. In the old days it used to be called "Going to HCCO" and we still like to think of it as our flagship event. Food and drinks will be provided at the event. Feel free to show up a little bit early to hang out and talk. Our March speakers are Molly Gaines and Zack Parrish, co-organizers of the Secular Education Association: They will share their story of how a small group of Ohio parents grew into a national organization tracking released-time religious instruction and other church–state issues in public schools. The presentation will cover SEA’s early wins and hard lessons, what we’re seeing nationally right now, and how local advocates can play a meaningful role in protecting public education. Attendees will leave with a clearer understanding of the landscape — and practical ways to get involved. Going forward our meetings will be hybrid. You can meet us in-person or attend online Join Zoom Meeting [https://us02web.zoom.us/j/87836564953?pwd=4Mi57ElZkDIFlb1fnlNwOJ0NiOK4tP.1](https://us02web.zoom.us/j/87836564953?pwd=4Mi57ElZkDIFlb1fnlNwOJ0NiOK4tP.1) Meeting ID: 878 3656 4953 Passcode: 760812 One tap mobile +19292056099,,87836564953#,,,,\*760812# US (New York) +13017158592,,87836564953#,,,,\*760812# US (Washington DC) The formal presentation will start at noon

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.

http://photos2.meetupstatic.com/photos/event/2/a/9/6/600_348310902.jpeg Instructor - Crow, HPS Class fee is $30 at the door or approved exchange RSVP with Advance pay of $25 (discounted) by PayPal on the web or by contacting Enchanted Elements (614) 437-2642. Reservations made directly to Enchanted Elements will be added to the class list manually not online. Private Instruction ~ Closed to the Public ~ Initiated Members Only Please come prepared for ritual. Blessings ~ Crow

It’s time to take control of your mental health. How do you get rid of stress, anxiety and uncertainty? These emotions are buried deep in your reactive mind. Find out what the reactive mind is, and in the process find yourself. Here is the secret of being positive and free: Thinking positively is not enough. You also have to get rid of the negative thinking. Your mind is like a garden. You can plant many beautiful flowers in it, but if you don't get rid of the weeds when you plant your flowers, the weeds will soon take over the whole garden. A positive thought is like a flower in your mental garden, and a negative thought is like a weed. You cannot expect to have a positive mindset if you continue to have negative thoughts dwelling and growing there. So, how do you get rid of the negative thoughts? That's what this Meetup is all about. Attend this local meeting and find out! The Meetup event will be led by a consultant who had helped many people live happier in life. Be sure to click on the red "Attend" button below to come to this local event. We look forward to seeing you there. This group is created by the Dianetics & Scientology life improvement center.

Private Group. Closed to the Public Knowing ourselves and understanding our abilities is the first step toward wielding our gifts with control and accuracy. In subsequent classes we will verify and hone our talents with activities and discussion. These are hands-on workshops and participation is expected. The goal of our series will be to develop expertise in areas of particular interest such as mediumship, channeling, divination, healing and, etc.. Our ultimate directions will be determined by class members as we evolve. I look forward to sharing and discovering with you. - Cynthia