The James Webb Space Telescope (JWST) @itelescopewebinars

Uploaded November 2022 | Updated September 2026, 2 weeks ago

Guest Speaker: Dr. Jonathan Gardner, Deputy Sr. Project Scientist of JWST, NASA’s Goddard Space Flight Center
Summary: Learn about the JWST directly from one of its Sr. project scientists at Nasa. Dr. Gardner describes how the JWST is the successor of the Hubble Space Telescope (HST) and the Spitzer Space Telescope (SST). Dr. Gardner explains the key science goals of the JWST, which are: a) to find the first galaxies; b) to help scientists understand galaxy evolution; c) to help explain how stars and planets are formed; and d) to find exoplanets with the conditions to sustain life and observe the outer planets of the solar system.

Chapters
0:00 Introduction
3:01 Science Goals
3:42 Hubble Ultra Deep Field
6:57 Hubble vs. JWST
15:00 JWST cameras
18:41 Mirror assembly
21:00 Optical Testing
23:15 Attaching the telescope to the sun shields
24:35 Packing and Shipping
25:10 JWST launch
27:41 Deployment of instrumentation
29:19 Aligning mirrors
35:08 Image Sharpness check
36:31 First public images
47:38 First-year science program
49:23 Wrap-up

JWST web resources
webb.nasa.gov
webbtelescope.org
https://www.esa.int/Science_Exploration/Space_Science/Webb

#iTelescope
#jwst

Collapsing Galaxies Creating Black Holes with Dark Matter at Cosmic Dawn

$The Grand Design: How Large Scale Structure Illuminates Cosmology and Particle Physics Title: The Grand Design: How Large-Scale Structure Illuminates Cosmology and Particle Physics– 8-09-2024 Guest Speaker: Abbe Whitford, PhD Student, University of Queensland, Australia. Summary: In this webinar Abbe presents how large-scale structures in the universe, of the order of GPCs (giga-parsecs), can inform scientists on cosmology and the nature of particle physics. She begins by explaining that the study of large-scales structure is important to help determine the distribution of normal matter, dark matter, and the radiation of the early universe, after the big bang. Right after the big bang, the radiation domination epoch began, where most of the energy was in the form of radiation. Over time the radiation decreased, and density of matter increased. As time continued, the dark energy domination epoch began, which is believed to be driving the expansion of the universe. On the other hand, early in the universe it is believed that neutrinos stopped interacting with other particles and started flying freely. Although it was believed that these particles had no mass, now it seems that they might have a small mass. Based on the analysis presented, the mass of neutrinos might have a direct impact on the structure of the universe. If you are interested in the study of cosmology and how it might have been influenced by neutrinos, this video will be for you. We hope you enjoy it! iTelescope https://www.itelescope.net The University of Queensland Australia https://www.uq.edu.au Astrobites.com https://www.astrobites.org/author/awhitford/ Chapters 00:00- Introduction 01:28- Using the Large-scale Structure of the Universe 06:05- Why do we care about the Large-scale Structure of the Universe? 11:39- Part 1: Uncovering the nature of the Universe with the motions of galaxies. 19:07- Poll Question 1 (How fast do you think the peculiar motion can be?) 20:47- Dark Matter Field vs Normal Matter Field 26:02- Poll Question 2 (What fraction of matter do you think is just the dark matter?) 28:57- The bulk flow motions of galaxies 39:33- CosmicFlows 4 dataset 43:22- Part 2: Using the sound waves in the early Universe to understand neutrinos. 44:39- Poll Question 3 (How fast did sound waves move in the early Universe?) 46:43- Sound Waves as Bubbles or BAO’s data results 51:57- How is this related to neutrinos? And firstly, what are neutrinos? 59:36- Questions and Answers #iTelescope #astrophotography #astronomy #astro #deepsky #cosmology$

The Lives and Deaths of Galaxies in the Universe