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DTSTART;TZID=UTC:20260418T170000
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SUMMARY:Astronomy Night 14: How Fast is the Universe Expanding?
DESCRIPTION:Astronomy Night 14 continues CASSA’s signature two-part format: a public talk by an astronomer and astrophysicist\, followed by a dual stargazing session — combining digital and optical observation for a complete journey from lecture hall to the night sky. \n\nThe Public Talk \nHow fast is the Universe expanding? For decades\, astronomers have sought to answer this deceptively simple question by measuring the Hubble Constant — yet depending on the method used\, they arrive at two frustratingly conflicting answers. Looking at the faint afterglow of the Big Bang suggests one expansion rate\, while measuring distances to pulsating stars and supernovae in our local cosmic neighborhood yields a notably faster one. As precision observatories like the Hubble and James Webb Space Telescopes rule out measurement error\, this “Hubble Tension” has grown into a genuine crisis at the heart of modern cosmology. Join us for a journey into how we measure the vastness of space — and whether our standard model of the Universe is due for a profound revision. \nThe talk will be delivered at the IUB Auditorium by Dr. Syed Ashraf Uddin\, an astronomer and astrophysicist of IUB whose work sits at the forefront of this very debate. Dr. Uddin is a co-author of a landmark study published in April 2026\, in which a global collaboration of nearly 40 experts replaced the traditional cosmic distance ladder with a Local Distance Network — linking independent distance indicators simultaneously to achieve an unprecedented 1% precision measurement of the Universe’s local expansion rate. The result remains in significant tension with values inferred from the early Universe\, effectively ruling out the possibility that the Hubble Tension arises from a single overlooked error\, and pointing instead toward new physics beyond the standard cosmological model. There are few people better placed to take you inside this unfolding story. \nThe talk forms part of the prize-giving ceremony of the National Round of the Bangladesh Olympiad on Astronomy and Astrophysics (BDOAA)\, hosted at IUB jointly by the Department of Physical Sciences and CASSA. The auditorium will therefore bring together some of the country’s brightest young minds from various schools and colleges. \n\nThe Stargazing Sessions \nAfter the talk\, we move to the rooftop of the IUB Main Academic Building — CASSA’s home base — for a dual stargazing experience that offers two very different ways of meeting the cosmos. \nThe digital session features the Unistellar Equinox telescopes that captures and broadcasts live images of distant galaxies directly to digital screens. This is citizen astronomy at its most accessible — no eyepiece required\, no dark adaptation\, just the deep Universe delivered in real time. \nThe optical session brings you back to the roots of observational astronomy with the Skywatcher 8-inch manual telescope. Here\, the light that left a star or nebula travels directly to your eye — unmediated\, unprocessed\, and irreplaceable. It is a reminder that for all our technology\, the oldest connection between a human being and the night sky remains the most intimate. \nBoth sessions will be conducted as part of CASSA’s Durbin public astronomy program\, with trained Durbin volunteers guiding participants through the instruments and the sky — bringing their characteristic warmth and enthusiasm to every eyepiece and every screen. \nCome for the science. Stay for the stars.
URL:https://cassa.site/event/an14/
LOCATION:Independent University\, Bangladesh\, 16 Aftabuddin Ahmed Road\, Bashundhara RA\, 1229\, Bangladesh
CATEGORIES:Astronomy Night
ATTACH;FMTTYPE=image/webp:https://cassa.site/wp-content/uploads/2026/04/an14-land.webp
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DTSTART;TZID=UTC:20260421T133000
DTEND;TZID=UTC:20260421T141000
DTSTAMP:20260514T214959
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SUMMARY:Journal Talk 18: Emmet Golden-Marx et al. (2023)
DESCRIPTION:The High-redshift Clusters Occupied by Bent Radio AGN (COBRA) Survey: Investigating the Role of Environment on Bent Radio AGNs Using LOFAR. \nLink: https://doi.org/10.3847/1538-4357/acf46b \nPresenter: Farhana Ferdous (Undergraduate student\, Applied Physics & Electronics Department\, Brac University) \n— \nBoth in person and online. \nTo get notifications and the Google Meet link\, subscribe using the Google Form: \nhttps://forms.gle/fikhmc7Y2whjJWKK9
URL:https://cassa.site/event/jtalk-18/
LOCATION:CASSA\, IUB Main Building Rooftop\, Plot 16\, Aftabuddin Ahmed Road\, Block B\, Bashundhara RA (Main Building Rooftop)\, Dhaka\, 1229\, Bangladesh
CATEGORIES:Journal Talk
ATTACH;FMTTYPE=image/webp:https://cassa.site/wp-content/uploads/2025/06/journal-talk.webp
ORGANIZER;CN="CASSA%2C Independent University%2C Bangladesh":MAILTO:cassa@iub.edu.bd
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