CASSA

Rubin First Look Watch Party
2025-06-23 20:30 - 22:30 UTC | CASSA, IUB Main Building Rooftop, Plot 16, Aftabuddin Ahmed Road, Block B, Bashundhara RA (Main Building Rooftop), Dhaka, 1229, Bangladesh
🌌 You’re Invited: Rubin First Look Watch Party at CASSA! 🌌
Join us at CASSA, IUB, for a truly historic moment in astronomy! 🚀
📅 Date: Monday, 23 June 2025
🕚 Time: 8:00 PM BST (Live stream starts at 8:30 PM)
📍 Venue: CASSA, Independent University, Bangladesh
We are thrilled to host a local Watch Party for the Rubin First Look — the global unveiling of the very first images from the Vera C. Rubin Observatory! 🌠 This marks the dawn of a new era in astronomy, and you can witness it live with the global science community.
🔭 What’s happening:

08:00
Guests arrive at CASSA office and Dr. Asad introduces the program

08:15
“Bringing the Night Sky to Life” — an interactive (with Q&A) introduction (with slides) to the Rubin observatory

08:45
A demonstration of the small telescopes of Durbin at CASSA office

09:00
Rubin First Look Unveiling Event livestream begins

10:30
Q&A about the livestream and about the future of Rubin

All are welcome — students, astronomy enthusiasts, faculty, and the curious alike!
📡 Live stream in English (Spanish version also available)
Don’t miss your chance to be part of this celestial milestone!
Follow this page for updates. 🌌

Journal Talk 1: Garon et al. 2019
2025-06-17 12:00 - 13:30 | CASSA, IUB Main Building Rooftop, Plot 16, Aftabuddin Ahmed Road, Block B, Bashundhara RA (Main Building Rooftop), Dhaka, 1229, Bangladesh
Radio Galaxy Zoo: The Distortion of Radio Galaxies by Galaxy Clusters
https://doi.org/10.3847/1538-3881/aaff62
Presenter: Mir Sazzat Hossain

CASSA Workshop 1: Unclouding the Thousand Eyes of an Array Radio Telescope
2025-05-02 09:00 - 2025-05-03 17:00 | CASSA, IUB Main Building Rooftop, Plot 16, Aftabuddin Ahmed Road, Block B, Bashundhara RA (Main Building Rooftop), Dhaka, 1229, Bangladesh
The most advanced telescopes at radio wavelengths are now Array Radio Telescopes (ART), arrays of hundreds and thousands of radio antennas guarding the universe like Argus in Ovid’s Metamorphoses. ARTs are everywhere, from the Y-shaped Very Large Array (VLA) in the deserts of New Mexico to the rectilinear Medicina displayed dramatically in the Red Desert (1964) of Michelangelo Antonioni (pictured in the poster).
In this 2-day workshop for undergraduate, postbac and graduate students of Bangladesh, we will learn the basics of radio astronomy and synthesis arrays on the first day, and then apply that knowledge to make a sparse representation of the radio vision of an ART in python. It is a BYOL workshop, so you have to ‘bring your own laptop’ with python and jupyter-lab set up in a UNIX-based operating system (Ubuntu is an excellent choice). Eligibility criteria, registration link, and the program are given below.

Eligibility

You have to be an undergraduate, postbac (finished BSc but did not start any other academic program yet), or graduate student currently living in Bangladesh.
You have to be able to join the workshop in person at IUB from 9 am – 5 pm on 18 and 19 April, 2025. Online option is not available for this specific workshop, but in future CASSA will have both in person, online and hybrid workshops.
The subject of your undergraduate or graduate studies have to be a math-intensive engineering, mathematical or natural science, or computer science.
You should have some basic knowledge of python;. Being an expert in python is not necessary, because the students will be divided in groups for groupworks (GW) and we will ensure that each group has a variety of students with different levels of expertise in python.
You must bring (and work on) your own laptop (BYOL) and the laptop should have a UNIX-like terminal and jupyter-lab with which you can log into a high-performance computing server. If you are not sure about the setup in the terminal and jupyter-lab, we will help you during the workshop.
No prior knowledge of astronomy is required, but previous experience in learning or researching astronomy will be considered for the final selection of participants.
We encourage you to browse through the online textbook Essential Radio Astronomy before appearing for the workshop, but you will not be tested on it.

Registration

If you are eligible (based on the previous section), please click here for the Google Form for registration (or the button above).
Registration deadline: 18 April, 2025.
We specially encourage women to apply without any hesitation. At least 40% of seats will be reserved for women applicants.

Program Schedule
The following is the tentative schedule, which may be subject to minor changes until 30 April. [GW: groupwork]

Day
From
To
Segment
Instructor

2
May
2025
Fri

9:00
10:00
Icebreaker

10:00
11:00
Introduction to radio astronomy
KMB Asad

11:00
11:30
Coffee break

11:30
12:30
Array Radio Telescopes (ART)
Asad

12:30
02:00
Lunch break 1

02:00
03:00
Primary beams of ART antennas
Asad

03:00
03:30
Group creation

03:30
05:00
GW: Setting up the group projects
CASSA TAs

07:00
09:00
Optional stargazing at night
Durbin

3
May
2025
Sat

9:00
10:00
Sparse representation of beams
Asad

10:00
11:00
GW: decomposing LOFAR beams
Asad

11:00
11:30
Coffee break

11:30
12:30
GW: reconstructing LOFAR beams
CASSA TAs

12:30
02:00
Lunch break

02:00
03:00
GW: finalizing LOFAR beams
CASSA TAs

03:00
03:30
Submission of the GWs

03:30
05:00
GW presentations
Asad

Teaching Assistants

Afnan Uzzaman, BSc student, electrical and electronic engineering, IUB.
Md. Shahadat Hossain Shahal, BSc student, computer science and engineering, IUB.
Mozammal Hossain Masum, BSc student, computer science and engineering, IUB.

List of Participants

Name
University
Group

Abantika Maytra Oishee
Hajee Mohammad Danesh Science and Technology University
1

Abyaz Karim
Independent University, Bangladesh
1

MD. MERAJUL HASAN
University of Dhaka
1

Most. Atia Sanjida
University of Dhaka
1

Sarker Mahathir Mohammad
University of Dhaka
1

Md. Soyed Ahmed
Ahsanullah University of Science and Technology
2

Brishti Dhar
Independent University, Bangladesh
2

Shams Habib Muzaffar
Independent University, Bangladesh
2

Ahmad Al-Imtiaz
Shahjalal University of Science and Technology
2

Tabib Zahin
University of Dhaka
2

Haniah Mokhtar
BRAC University
3

Tasfia Hasan Faiza
Independent University, Bangladesh
3

Nublat Hafsa
Independent University, Bangladesh
3

Fahima Khal Shayeq
Asian University for Women
4

Aiman Rafeed Bin Ehtesham
Military Institute of Science and Technology
4

Muhammad Arif Hussain
University of Dhaka
4

Tasnim Mahfuz Nafis
University of Dhaka
4

Urboshi Barua
Asian University for Women
5

Tazrian Noor
Independent University, Bangladesh
5

Deba Priyo Guha
Rajshahi University of Engineering and Technology
5

M.O.B. JIHAD
American International University-Bangladesh
6

Hameeda Ahmadi
Asian University for Women
6

Rownok Shahariar
Govt. Edward College, Pabna
6

Md. Abu Azad Tamim
University of Chittagong
6

Masuk Ridwan Saumo
Bangladesh University of Engineering and Technology
7

MD. SHAYED HASAN SAHKIB
Daffodil International University
7

Miss Nourin Nurain Amina
Khulna University
7

Hridita Nowrin Pranti
University of Chittagong
7

Sajid Ahmed Chowdhury
Independent University, Bangladesh
8

Zakia Nazzum
Independent University, Bangladesh
8

LOFAR-EoR Plenary Meeting
2025-04-28 - 2025-05-02

CASSA Plenary Meeting 1
2025-03-16 21:45 - 22:45 | Google Meet
A meeting among the core and associate members for understanding the past and planning the future of CASSA.

CASSA Tea Talk 1: Revisiting the age scale of Galactic globular clusters
2025-02-13 14:30 - 15:30 | IUB Room BC2022, Digital Classroom, IUB, Plot 16, Aftabuddin Ahmed Road, Block B, Bashundhara RA, Dhaka, 1229, Bangladesh
Speaker: S M Masruk Uddin, M2 Sudent (International Research Track), Observatoire de Paris; Research Intern, Laboratory for Astrophysics Research and Instrumentation (LIRA); Paris Sciences et Lettres University (PSL), France.
Abstract: Globular clusters (GCs) are critical for understanding the formation and evolution of the Milky Way. Their ages provide constraints on Galactic formation models. This study revisits the age scale of Galactic GCs using photometric data from the Hubble Space Telescope and spectroscopic data from the APOGEE survey. The SPInS (Stellar Parameters Inferred Systematically) framework was employed to infer ages through Bayesian analysis with Markov Chain Monte Carlo (MCMC). Initial tests on NGC 5053 refined the methodology but highlighted computational inefficiencies in SPInS, particularly for large datasets. Despite these challenges, the analysis produced robust age estimates consistent with the established age of the Milky Way. Anticipated optimizations to SPInS will allow scaling the methodology to all selected clusters, enabling precise age determinations and enhancing our understanding of Galactic formation history.
S M Masruk Uddin graduated from IUB with a major in physics and minor in computer science.

CASSA Colloquium 6: Unraveling the distant Universe with wide-field surveys of star-forming galaxies
2025-02-06 13:00 - 14:30 | Room MK5004, DMK Building, IUB, Plot 16, Aftabuddin Ahmed Road, Block B, Bashundhara Ra, Dhaka, 1229, Bangladesh
Speaker: Tanveer Karim, PhD, Postdoctoral Fellow at the David A. Dunlap Department of Astronomy & Astrophysics, University of Toronto, and a member of the Dark Energy Spectroscopic Instrument (DESI) collaboration and the Dark Energy Science Collaboration (DESC).
Abstract: Over the past decade, cosmology has encountered significant tensions between different measurements of key cosmological parameters, particularly when comparing the cosmic microwave background (CMB) with data from large-scale structures. Historically, large-scale structure observations have primarily focused on the Universe below redshift 1 using galaxies that are 100-1000 times more massive than our Milky Way. However, ongoing and upcoming surveys, such as the Dark Energy Spectroscopic Instrument (DESI) and the Rubin Observatory, are expanding these measurements beyond redshift 1, opening new avenues for exploration. In this talk, I will discuss the exciting opportunities and the challenges of probing the Universe at 𝑧 ≥ 1 using wide-field surveys of star-forming and less massive galaxies. I will present recent results from the cross-correlation of DESI Legacy Imaging Surveys’ Emission-Line Galaxies with Planck CMB lensing and contextualize reasons for various apparent tensions.
Google Meet: https://meet.google.com/izz-qwux-pod

CASSA Colloquium 5: Lower Dark Matter in the Local Group Galaxies and the Origin of the MW Dwarfs
2025-01-30 14:00 - 15:00
Speaker:
Istiak Akib, PhD candidate, Laboratoire d’Instrumentation et de Recherche en Astrophysique (LIRA), Observatoire de Paris, Paris Sciences et Lettres University (PSL).

Abstract:
Fitting the flat rotation curves of the Galaxies indicate vast majority of the matter content in the galaxies is dark matter, even higher than the cosmological estimate of 85% and giving rise to the missing baryon problem. However, these rotation curve fits assume equilibrium conditions at the disk outskirts. This is not necessarily always fulfilled since on average galaxies have gone through a major merger 6 Gyr ago. For the MW, the last major merger was 9-10 Gyr ago and the disk outskirts had enough time to reasonably fulfill the equilibrium conditions. Gaia DR3 rotation curve for the MW differs significantly from a flat fit and is consistent with a Keplerian decline. This gives a mass of $2.06times 10^{11}$ M$_odot$, resulting in a dark matter fraction of 70%. Another estimate for the galaxy mass comes from comparing the time frame of the bulge formation and the accretion of the satellites with their binding energies. For the MW, this is in agreement with the mass from the rotation curve. Andromeda Galaxy (M31) had a recent 2-3 Gyr major merger and hence the disk outskirts are likely not in equilibrium. Hydrodynamical modeling of this merger resulting in an M31 of mass $4.5times 10^{11}$ M$_odot$ and 68% dark matter reproduces the observational features of the M31 and especially its rotation curve. These M31 merger models indicate tidal tails coming towards the MW with significant stellar and gas particles. Part of these tails is found in agreement in the 6D space with most of the VPOS (Vast POlar Structure) satellites including the LMC for the case of such low mass MW models. This may explain the origin of the MW’s plane of satellites and is a first indication of matter exchange between these two galaxies.
Relevant papers:

Jiao et al 2023: Detection of the Keplerian decline in the Milky Way rotation curve.
Hammer et al 2024a: The Milky Way accretion history compared to cosmological simulations.
Hammer et al 2024b: Dark matter fraction derived from the M31 rotation curve.
Akib et al 2025: An intriguing coincidence between the majority of the VPOS dwarfs and a recent major merger at the M31 position (in revision at A&A).
Jiao et al 2025: Dark matter mass range in the Milky Way derived from the rotation curve (in preparation).

CASSA Colloquium 4: Astronomy in Space: Pioneering Missions for Lunar and Orbital Observatories
2025-01-09 13:00 - 14:00 | Lecture Gallery MK9006, DMK Building, IUB, Plot 16, Aftabuddin Ahmed Road, Block B, Bashundhara RA, Dhaka, 1229, Bangladesh
Speaker: Shah Mohammad Bahauddin, PhD, Research Faculty, Laboratory for Atmospheric and Space Physics (LASP), Astrophysical & Planetary Sciences Department, University of Colorado, Boulder, USA.
Abstract: The next frontier of astronomy lies in leveraging the unique environments of space and the Moon to unlock unprecedented scientific discoveries. This presentation will explore the speaker’s journey of transforming scientific questions into mission concepts, focusing on the development of space and lunar observatories. Drawing on experience with NASA mission concepts, the talk will emphasize the intersection of scientific motivation, instrument design, and mission planning. It will also highlight the transformative potential of innovative technologies, such as advanced optical designs, onboard artificial intelligence, and cutting-edge signal processing techniques, in enabling new avenues for space astronomy. By harnessing the unique advantages of space-based and lunar observatories, these missions aim to address fundamental questions about the origins, dynamics, and evolution of the universe.
Relevant article: This May Be the First Complete Observation of a Nanoflare, NASA.

CASSA Colloquium 3: Measuring the Expansion Rate of the Universe from Carnegie Supernova Project
2025-01-05 13:00 - 14:00 | Lecture Gallery MK9006, DMK Building, IUB, Plot 16, Aftabuddin Ahmed Road, Block B, Bashundhara RA, Dhaka, 1229, Bangladesh
Speaker: Syed A Uddin, PhD, Department of Physics and Astronomy, University of South Carolina, USA.
The Known Unknowns of Observational Cosmology: Measuring the Expansion Rate of the Universe from Carnegie Supernova Project
Abstract: In the era of precision cosmology, where percent-level accuracy in measurements is now within reach, we are still confronted with profound enigmas: dark matter, dark energy, and the Universe’s dark ages. Compounding these challenges is the ongoing discrepancy in Hubble constant values, known as the Hubble tension, between measurements from the Cosmic Microwave Background and those based on the Type Ia Supernova distance scale. In this talk, I will explore key milestones in observational cosmology, delve into the intricacies of Hubble constant measurements, and share our latest findings from the Carnegie Supernova Project.
Relevant paper: Carnegie Supernova Project I and II: Measurements of H0 Using Cepheid, Tip of the Red Giant Branch, and Surface Brightness Fluctuation Distance Calibration to Type Ia Supernovae.

CASSA Colloquium 2: Exploring the Co-Evolution of Star Clusters and Galaxies Since Cosmic Dawn with JWST
2024-12-19 13:00 - 14:00 | Lecture Gallery MK9006, DMK Building, IUB, Plot 16, Aftabuddin Ahmed Road, Block B, Bashundhara RA, Dhaka, 1229, Bangladesh
Speaker:
Lamiya Ashraf Mowla, PhD, Assistant Professor, Department of Physics and Astronomy, Wellesley College, USA.
Abstract:
The most distant galaxies observed date back to when the Universe was only 5% of its current age, with progenitors of galaxies like the Milky Way being about 10,000 times less massive. Using JWST and the magnification provided by gravitational lensing, these low-mass galaxies can be detected and studied in detail. In this work, we present JWST observations of the “Firefly Sparkle,” a strongly lensed galaxy at (z = 8.3) in the CANadian Unbiased Cluster Survey (CANUCS). This galaxy features massive star clusters cocooned in a diffuse arc, showcasing characteristics of a young, gas-rich galaxy in the early stages of formation. The unresolved clusters display exceptionally high surface densities, surpassing those of Milky Way globular clusters and nearby young star clusters, along with nebular-dominated spectra, low metallicity, high gas density, and elevated electron temperatures, suggesting a top-heavy initial mass function (IMF). These observations provide the first spectrophotometric view of a typical galaxy at Cosmic Dawn, highlighting JWST’s capability to investigate the co-evolution of galaxies and star clusters. I will also discuss plans to expand this work using future JWST cluster observations, aiming to deepen our understanding of the evolution of galaxy.
Relevant reading:

Mowla et al. 2024, “Formation of a low-mass galaxy from star clusters in a 600-million-year-old Universe,” Nature.
Mowla et al. 2024, “The Firefly Sparkle: The Earliest Stages of the Assembly of A Milky Way-type Galaxy in a 600 Myr Old Universe,” submitted.
ওয়েবের দেখা গ্যালাক্সি ফায়ারফ্লাই স্পার্কল যেন এক ঝাঁক জোনাকি; কাসা নিউজ।

Dr. Mowla will give the talk in-person at IUB. The event is open to students and researchers of all universities both offline (at IUB) and online. If you RSVP and want to join online, a google meet link will be shared with you before the event begins.

Astronomy Night 9: Technocultures in the Milky Way
2024-12-12 17:30 - 19:30
Organized by Durbin. More information here: https://durbin.cc/event/an9/

CASSA Colloquium 1: Galaxy Evolution in High-Density Environments: Insights from Hydrodynamic Simulations and Multi-Wavelength Observations
2024-11-28 13:00 - 14:00 | Lecture Gallery MK9006, DMK Building, IUB, Plot 16, Aftabuddin Ahmed Road, Block B, Bashundhara RA, Dhaka, 1229, Bangladesh
Speaker:
Syeda Lammim Ahad, PhD, WCA Postdoctoral Fellow, Waterloo Centre for Astrophysics, University of Waterloo, Canada; Associate Member, CASSA.
Abstract:
Galaxies in the Universe are distributed along the intricate framework of the Cosmic Web. Groups and clusters of galaxies comprise the densest regions in this network and therefore, are excellent cosmic laboratories to study different aspects of galaxy evolution in extreme environments. With the development of realistic cosmological hydrodynamic simulations, we now have an excellent opportunity to study such galaxy evolution in extreme environments combining theory and observations. In this colloquium, I will present the results from several studies exploring different properties of cluster galaxies and their host systems, such as the spatial distribution of mass in galaxies within clusters, the faint and diffuse stellar halo in groups and clusters, and processes that quench star formation in massive galaxies in high-redshift clusters. I will discuss major questions, current understanding, and future research directions. Finally, I will discuss the scope for conducting such research from Bangladesh, illustrating the potential for local contributions to the global astrophysics community.
Relevant reading:

Ahad et al., 2024, An environment-dependent halo mass function as a driver for the early quenching of z ≥ 1.5 cluster galaxies, MNRAS.
Ahad et al., 2023, How to interpret measurements of diffuse light in stacked observations of groups and clusters of galaxies, MNRAS.
Ahad et al., 2021, The stellar mass function and evolution of the density profile of galaxy clusters from the Hydrangea simulations at 0 < z < 1.5, MNRAS.
আইইউবিতে গ্যালাক্সির বিবর্তন নিয়ে সৈয়দা লাম্‌মীম আহাদের সেমিনার, বিজ্ঞানচিন্তা, প্রথম আলো।

Zoom Q&A session on Astronomy PhD admission for Bangladeshi students
2024-10-26 20:30 - 22:00
Many Bangladeshi astronomers are currently engaged in research and teaching positions in various countries, including many PhD, postdoc, and faculty members. On Saturday, October 26, at 8:30 PM, I will be participating in an online panel discussion with five people from North American to talk about opportunities for pursuing a PhD in astronomy abroad, specifically for Bangladeshi students.
The panel discussion is organized by Shajib, a postdoc at the University of Chicago. Joining the panel will also be Lammim, a postdoc at the University of Waterloo in Canada; Lamiya, a faculty member at Wellesley College, USA; Pritom, a postdoc at UCLA; and Niranjan, a PhD student at the University of Connecticut.
Registration link is available on Shajib’s website: https://www.astrobridge.org/events.

67th Anniversary of Sputnik Flight to Outer Space
2024-10-24 09:30 - 11:30
Khan Asad is invited as the Chief Guest for the 67th Anniversary of the Sputnik Flight to Outer Space, taking place on Thursday, 24th October 2024, at Legend International School. This significant event will celebrate humanity’s groundbreaking achievement of venturing into space, marking the launch of the first artificial satellite, Sputnik, which continues to inspire generations.

Open Discussion at Quantum Foundation
2024-10-12 16:00 - 18:00

SCOSTEP/ISWI International School on Space Science 2024
2024-09-15 - 2024-09-19
SCOSTEP/ISWI International School on Space Science 2024 will be held in Kathmandu, Nepal. The event is sponsored by International Space Weather Initiative (ISWI) and the Scientific Committee on Solar-Terrestrial Physics (SCOSTEP) and hosted by Nepal Physical Society (NPS). The school is meant for mainly graduate students and anyone with at least a BSc in physics or a related field can apply for participating in the event.
Students can apply using this Google Form.
Deadline for application: 31 May 2024.

LOFAR-EoR Plenary Meeting 2024
2024-04-24 - 2024-04-26

Astronomy Night 4
2023-11-02 19:00 - 21:00 | IUB Room BC2022, Digital Classroom, IUB, Plot 16, Aftabuddin Ahmed Road, Block B, Bashundhara RA, Dhaka, 1229, Bangladesh

IUB Astronomy Night III
2023-10-12 19:00 - 21:00 | IUB Room BC2022, Digital Classroom, IUB, Plot 16, Aftabuddin Ahmed Road, Block B, Bashundhara RA, Dhaka, 1229, Bangladesh
Regular Astronomy Nights (stargazing events) are beginning at IUB starting from this Thursday. You will get the chance to take images of the sky using a Unistellar eQuinox telescope and see the images on a large monitor at the Digital Classroom of IUB (BC2022).
If more than half of the sky is covered in clouds, the images taken by eQuinox so far will be shown in BC2022 accompanied by an informal discussion and Q&A with an astronomer.
The event is open to people of all ages from anywhere. However, please remember to RSVP before you come and also to check-in at Room BC2022 on time.

COALab Colloquium 1
2023-10-12 14:00 - 15:00 | IUB Room BC2022, Digital Classroom, IUB, Plot 16, Aftabuddin Ahmed Road, Block B, Bashundhara RA, Dhaka, 1229, Bangladesh
Title: Pulsars: The Incredible Physics of Incredible Stars
Speaker: Afiq Abdul Hamid, PhD student, Victoria University of Wellington, New Zealand.
Abstract: Pulsars/ Neutron Stars are exotic stellar remnants that exist as laboratories of extreme physics. Since their discovery 60 years ago, the study of pulsars has expanded to become a fertile field of radio astronomical research. This talk will give a broad view of the current field of radio pulsar astronomy to date with an additional look to the future horizons of the field in order to entice students to further pursue a potential future this in the area.

You can see a Famelab Heats talk by the speaker at this google drive link.

IUB Astronomy Night II
2023-04-13 19:30 - 21:30
Join us on the roof of the academic building of IUB for Astronomy Night II on 13 April 2023, 7:30 pm. Tanweer Hasan, PhD, the honorable Vice Chancellor of IUB, announced the beginning of astronomy nights on 9 March 2023 and ARGI will organize these nights of stargazing and open discussion regularly. Most of the astronomy nights will be open to everyone, but this week we are welcoming only IUB students, faculty and staff. Hope to see you all under a starry night!
Weather permitting, you can see the sky via the screen of our eQuinox telescope on the roof. Looking at the solar system objects through the eyepiece of a Celestron telescope or through a couple of binoculars are also possible. You can engage with our ‘astronomy nighthawks’ (undergraduate students) and ask an astronomer (Dr. Khan Asad) your questions about the universe.
Please register for the event by clicking on the Going (RSVP) button on the sidebar.
This Astronomy Night will also be a celebration of the last day of the Bangla calendar, 30 Chaitra 1429.

IUB Astronomy Night I
2023-03-09 17:00 - 21:00 | IUB Auditorium, Independent University, Bangladesh, Dhaka, Bangladesh
The first IUB Astronomy Night was on 9 March 2023. Please see the poster of the event below.

National and Regional volunteers of Durbin after an evening of hard work.
