Welcome to the first episode of Crash Course Astronomy. Your host for this intergalactic adventure is the Bad Astronomer himself, Phil Plait. We begin with answering a question: "What is astronomy?" Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster -- Chapters: Introduction 00:00 What is Astronomy? 3:00 Who Studies Astronomy? 3:50 Origins of Astronomy 5:27 Astrology vs Astronomy 6:19 Geocentrism 7:51 Revolutions in Astronomy 8:58 Astronomy Today 10:26 Review 11:29 -- PBS Digital Studios: http://youtube.com/pbsdigitalstudios Follow Phil on Twitter: https://twitter.com/badastronomer Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids -- Photos: http://commons.wikimedia.org/wiki/File:Earth_cutaway.png http://en.wikipedia.org/wiki/Earth%27s_magnetic_field#mediaviewer/File:Geodynamo_Between_Reversals.gif http://en.wikipedia.org/wiki/Geomagnetic_storm#mediaviewer/File:Magnetosphere_rendition.jpg http://en.wikipedia.org/wiki/Saturn#mediaviewer/File:Saturn_PIA06077.jpg http://en.wikipedia.org/wiki/243_Ida#mediaviewer/File:243_Ida_large.jpg http://commons.wikimedia.org/wiki/File:Comet_Hale_Bopp_NASA.jpg http://solarviews.com/raw/comet/kuiper3.jpg http://solarviews.com/cap/comet/kuiper3.htm http://en.wikipedia.org/wiki/List_of_nearest_bright_stars#mediaviewer/File:3_Solar_Interstellar_Neighborhood_(ELitU).png http://www.slate.com/blogs/bad_astronomy/2013/06/28/planetary_nebula_sh2_68_the_flaming_skull_nebula.html http://www.slate.com/blogs/bad_astronomy/2013/06/06/milky_way_galaxy_two_new_discoveries_about_its_spiral_arms.html http://en.wikipedia.org/wiki/Black_hole#mediaviewer/File:PIA16695-BlackHole-Corona-20130227.jpg http://commons.wikimedia.org/wiki/File:Messier_69_HST.jpg http://www.slate.com/blogs/bad_astronomy/2013/06/25/nearby_galaxies_swift_uv_pictures_of_two_galactic_neighbors.html http://upload.wikimedia.org/wikipedia/commons/0/0f/Earth%27s_Location_in_the_Universe_SMALLER_%28JPEG%29.jpg http://www.slate.com/blogs/bad_astronomy/2013/03/21/age_of_the_universe_planck_results_show_universe_is_13_82_billion_years.html http://www.esa.int/spaceinimages/Images/2007/02/True-colour_image_of_Mars_seen_by_OSIRIS http://en.wikipedia.org/wiki/Andromeda_Galaxy#mediaviewer/File:WISE-_Andromeda.jpg http://en.wikipedia.org/wiki/Triangulum_Galaxy#mediaviewer/File:VST_snaps_a_very_detailed_view_of_the_Triangulum_Galaxy.jpg http://en.wikipedia.org/wiki/Hubble_Space_Telescope#mediaviewer/File:HST-SM4.jpeg http://www.slate.com/blogs/bad_astronomy/2013/12/21/winter_solstice_2013_the_shortest_day_of_the_year.html http://www.slate.com/blogs/bad_astronomy/2012/12/28/full_moon_today_is_the_13th_full_moon_of_2012.html http://en.wikipedia.org/wiki/Nicolaus_Copernicus#mediaviewer/File:Nikolaus_Kopernikus.jpg http://en.wikipedia.org/wiki/Tycho_Brahe#mediaviewer/File:Tycho_Brahe.JPG http://en.wikipedia.org/wiki/Johannes_Kepler#mediaviewer/File:Johannes_Kepler_1610.jpg http://en.wikipedia.org/wiki/Isaac_Newton#mediaviewer/File:GodfreyKneller-IsaacNewton-1689.jpg http://en.wikipedia.org/wiki/Galileo_Galilei#mediaviewer/File:Justus_Sustermans_-_Portrait_of_Galileo_Galilei,_1636.jpg http://www.slate.com/blogs/bad_astronomy/2012/09/25/revealing_the_universe_the_hubble_extreme_deep_field.html

Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/BWxP/ (January 14, 2013) Leonard Susskind introduces the study of Cosmology and derives the classical physics formulas that describe our expanding universe. Originally presented in the Stanford Continuing Studies Program. Stanford University: http://www.stanford.edu/ Stanford Continuing Studies Program: http://csp.stanford.edu/ Stanford University Channel on YouTube: http://www.youtube.com/stanford

Lecture on science and astronomy. I start by going through some of the topics that may be covered in an introductory astronomy class. Then, we discuss why one might take an astronomy class. We finish with a discussion of the scientific method. These lecture videos are designed to complement the content in the OpenStax Astronomy textbook. The book can be downloaded free of charge at: https://openstax.org/details/books/astronomy/

#shorts #shortvideo #shortsfeed #shortsyoutube #shorts_video #neildegrassetyson #neuroscience #neurology #science #scienceandtechnology #sciencefacts Brian Cox: Scale of the Universe Prepare to have your mind blown by renowned physicist Brian Cox as he explains the mind-boggling scale of the universe in this must-see short video! From the tiniest subatomic particles to the vast expanse of space, Cox takes you on a journey that will leave you awestruck. Perfect for anyone interested in science, astronomy, or just curious about the mysteries of the universe. incredible visual and educational experience! Keywords: Brian Cox, universe, scale, physics, astronomy, education, mind-blowing. EVERYDAY TIPS to IMPROVE UR MIND! DISCLAIMER: This channel is not created, operated or in any form endorsed by Brian Cox. We are just sharing his content. Fair Use Disclaimer Copyright disclaimer under section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, commenting, news reporting, teaching, scholarship and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use.

Date: 29 March 2025 Language: English Description: Astrochemistry is a vibrant and rapidly growing field at the intersection of chemistry and astronomy. In this English-language lecture, Dr. Marie van de Sande explores how molecules—from the simplest to the most complex—play a key role in the evolution of stars and potentially in the emergence of life. Read more below: Abstract: Chemistry is fundamental to our understanding of astrophysics. Molecules – from simple hydrogen to complex organic compounds – are essential to the formation of stars and their planets all the way to their deaths. Since the first detection of interstellar molecules only 90 years ago, astrochemistry has blossomed into a rich and active field, connecting astronomical observations, laboratory experiments, and theoretical modelling. In this lecture, I will talk about how molecules and chemical processes shape the physics of stellar evolution and might hold the answer to the origins of life. About the speaker (English): Dr. Marie van de Sande earned her PhD in Astronomy and Astrophysics from KU Leuven in 2018. After her PhD, she worked as a postdoctoral researcher at KU Leuven (2018–2021) and at the University of Leeds (2021–2023). Now, she is an Oort Fellow at Leiden Observatory. Her research in astrochemistry focuses on molecules and chemical reactions in space. In 2023, she received the Caroline Herschel Prize Lectureship for her work. Over de spreker (Nederlands): Dr. Marie van de Sande behaalde in 2018 haar PhD in Astronomie en Astrofysica aan de KU Leuven. Na haar PhD werkte zij als postdoctoraal onderzoeker aan de KU Leuven (2018–2021) en aan de University of Leeds (2021–2023). Nu is zij Oort Fellow bij de Universiteit Leiden. Haar onderzoek in astrochemie richt zich op moleculen en chemische reacties in de ruimte. In 2023 ontving zij de Caroline Herschel Prize Lectureship voor haar werk.

Date: 29 March 2025 Language: English Description: Astrochemistry is a vibrant and rapidly growing field at the intersection of chemistry and astronomy. In this English-language lecture, Dr. Marie van de Sande explores how molecules—from the simplest to the most complex—play a key role in the evolution of stars and potentially in the emergence of life. Read more below: Abstract: Chemistry is fundamental to our understanding of astrophysics. Molecules – from simple hydrogen to complex organic compounds – are essential to the formation of stars and their planets all the way to their deaths. Since the first detection of interstellar molecules only 90 years ago, astrochemistry has blossomed into a rich and active field, connecting astronomical observations, laboratory experiments, and theoretical modelling. In this lecture, I will talk about how molecules and chemical processes shape the physics of stellar evolution and might hold the answer to the origins of life. About the speaker (English): Dr. Marie van de Sande earned her PhD in Astronomy and Astrophysics from KU Leuven in 2018. After her PhD, she worked as a postdoctoral researcher at KU Leuven (2018–2021) and at the University of Leeds (2021–2023). Now, she is an Oort Fellow at Leiden Observatory. Her research in astrochemistry focuses on molecules and chemical reactions in space. In 2023, she received the Caroline Herschel Prize Lectureship for her work. Over de spreker (Nederlands): Dr. Marie van de Sande behaalde in 2018 haar PhD in Astronomie en Astrofysica aan de KU Leuven. Na haar PhD werkte zij als postdoctoraal onderzoeker aan de KU Leuven (2018–2021) en aan de University of Leeds (2021–2023). Nu is zij Oort Fellow bij de Universiteit Leiden. Haar onderzoek in astrochemie richt zich op moleculen en chemische reacties in de ruimte. In 2023 ontving zij de Caroline Herschel Prize Lectureship voor haar werk.

Did you know that many profound discoveries about our universe have been made accidentally? Find out more with Chris Lintott. Buy Chris' book 'Our Accidental Universe: Stories of Discovery from Asteroids to Aliens' here: https://geni.us/IEBBkkY Watch the Q&A here: https://youtu.be/zKlv8zeBCnU Join BBC Sky at Night presenter and Gresham Professor of Astronomy Chris Lintott as he unravels tales of peculiar accidents, remarkable individuals, and the occasional human oversight that have collectively shaped some of the most pivotal celestial revelations. This lecture was recorded at the Ri on 21 March 2024. 00:00 Intro – our accidental universe 4:08 The incredible discovery made on Saturn’s moon Enceladus 13:27 Searching for life across the cosmos 19:16 Radio signals from across the universe? 29:06 Detecting possible structures around planets 39:51 Planetary ingestion – planets eating stars 45:11 Why conditions on Venus are so different from Earth 50:40 How NASA fixed the Hubble telescope in space 54:38 What Hubble discovered by accident When capturing the first glimpses of the earliest galaxies, the Hubble Space Telescope was focused on a region of space presumed to be vacant. However, the image it produced was anything but – the iconic Hubble Ultra-Deep Field image revealed at least 10,000 galaxies. Another astonishingly accidental discovery was the hidden story of Enceladus, one of Saturn’s myriad moons. Very little was known about Enceladus until NASA’s Cassini probe revealed its environment in more detail, including its capabilities as a potential haven for life. The narrative continues with the revelation of pulsars, the remnants of colossal stars long extinguished. They were not uncovered through meticulous observation but rather as hidden gems within the unassuming data, disguised as background noise in the measurements of faint celestial radio signals. As new observatories and state-of-the-art technology continue to develop, Chris calls for scientists to keep an open mind as the potential for discovery grows, allowing us to unravel the mysteries of the universe. ---- Christopher John Lintott is a British astrophysicist, author and broadcaster. He is a Professor of Astrophysics in the Department of Physics at the University of Oxford, and since 2023 is the Gresham Professor of Astronomy at Gresham College, London. Lintott is involved in a number of popular science projects aimed at bringing astronomy to a wider audience and is also the primary presenter of the BBC television series The Sky at Night. ---- The Ri is on Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and TikTok: https://www.tiktok.com/@ri_science Listen to the Ri podcast: https://podcasters.spotify.com/pod/show/ri-science-podcast Donate to the RI and help us bring you more lectures: https://www.rigb.org/support-us/donate-ri Our editorial policy: https://www.rigb.org/editing-ri-talks-and-moderating-comments Subscribe for the latest science videos: http://bit.ly/RiNewsletter Product links on this page may be affiliate links which means it won't cost you any extra but we may earn a small commission if you decide to purchase through the link.

Join Richard Ellis as he discusses his spectacular discoveries in modern cosmology over the last 40 years. Watch the Q&A here: https://youtu.be/izAsuw0zzak Read Richard's book here: https://geni.us/uBe2lf Astronomers are like time travellers. They scan the night sky for the outermost galaxies that first came into being when our universe was a mere fraction of its present age. In this talk, discover how a pioneering generation of scientists can now witness the time when starlight first bathed the cosmos and galaxies emerged from darkness. This talk was recorded at the Ri on 27 March 2023. Richard Ellis is Professor of Astrophysics at UCL. During his career his research has moved from detailed studies of nearby stars, topics in Galactic structure and nearby galaxies to broader questions relating to the large scale structure of the Universe and its contents, and the formation and evolution of galaxies. His recent work addresses the origin of the earliest galaxies and understanding their role in cosmic reionisation. His programmes are primarily observational exploiting ESO’s Very Large Telescope, the twin Keck telescopes and the Atacama Large Millimetre Array (ALMA). He remains enthusiastic about the use of new instruments and observational opportunities when they further the progress that can be made in these areas. He is co-scientific lead for the Prime Focus Spectrograph, a highly- multiplexed instrument for the Subaru 8 metre telescope in Hawaii, and looking forward to the progress of the NASA James Webb Space Telescope. Subscribe for regular science videos: http://bit.ly/RiSubscRibe -- A very special thank you to our Patreon supporters who help make these videos happen, especially: modsiw, Anton Ragin, Edward Unthank, Robert L Winer, Andy Carpenter, William Hudson Don McLaughlin, efkinel lo, Martin Paull, Ben Wynne-Simmons, Ivo Danihelka, Kevin Winoto, Jonathan Killin, Stephan Giersche, William Billy Robillard, Jeffrey Schweitzer, Frances Dunne, jonas.app, Tim Karr, Alan Latteri, David Crowner, Matt Townsend, THOMAS N TAMADA, Andrew McGhee, Paul Brown, David Schick, Dave Ostler, Osian Gwyn Williams, David Lindo, Roger Baker, Rebecca Pan -- The Ri is on Patreon: https://www.patreon.com/TheRoyalInstitution and Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and TikTok: https://www.tiktok.com/@ri_science Listen to the Ri podcast: https://anchor.fm/ri-science-podcast Our editorial policy: https://www.rigb.org/editing-ri-talks-and-moderating-comments Subscribe for the latest science videos: http://bit.ly/RiNewsletter Product links on this page may be affiliate links which means it won't cost you any extra but we may earn a small commission if you decide to purchase through the link.

Galaxies are collections of gas, stars, and dark matter held together by gravity. But how do galaxies, like our own Milky Way, change over their lives? Join us for a 30-minute lecture about galaxy evolution, followed by a panel Q&A consisting of several astrophysicists to answer your questions about astronomy and space science. Timestamps and description below: 00:00 Announcements 9:07 Introduction to Galaxies Presentation 13:48 Galaxies Presentation 43:34 Galaxies Q&A 43:56 "Which problem came first: dark matter or the CGM's missing matter?" 46:30 "What proportion of the missing matter is dark matter vs the CGM?" 48:13 "Why do more massive galaxies have less 'missing mass'?" 49:39 "Will your research help us better understand galaxies in the early universe?" 53:10 Intermission 58:23 Q&A Panel Introductions 1:01:18 "Are exoplanets more or less likely to be found around stars in clusters?" 1:04:43 "How much of galaxy research is based on assumptions vs evidence?" 1:11:50 "Are there gaps in our current ability to view the sky across all wavelengths? 1:17:59 "Is there work being done to recycle decommissioned satellites as telescopes?" 1:23:04 "Can supermassive black holes affect galaxy evolution?" 1:26:41 "Can dark matter just be diffuse gas?" 1:30:00 "How do we measure the mass of a galaxy?" 1:36:20 "What are the trends of the CGM in redshift?" 1:42:46 "Do all stars turn into supernovae?" 1:45:20 "What is the state of a star just before it explodes as a supernova?" 1:47:32 "Is the composition of gas inside and outside a galaxy the same?" 1:51:54 "Did the IGM cause the misinterpreted signal in the BICEP data?" 1:53:30 Concluding Remarks Title: Inside and Out: The Full Picture of Galaxy Evolution Lecturer: Evan Nuñez Abstract: Galaxies are collections of gas, stars, and dark matter held together by gravity. Much like humans, galaxies grow and change over their lives, which span billions of years. One major way that galaxies can change is by forming new generations of stars from collapsed clouds of gas. Thus, to understand the life and evolution of a galaxy, we must fully account for all of its gas. This includes both gas (1) inside the galaxy where stars form and live, and (2) outside of the galaxy, in a sort of atmosphere surrounding the galaxy. But like the Earth's atmosphere, galactic atmospheres are nearly invisible and difficult to detect. In this talk, I will summarize our understanding of how galaxies evolve over their lives, and new observations that indicate the presence and importance of a galaxy's atmosphere. Image Credit: NASA / Caltech / GALEX

Should be watched before class on Monday, January 27 Lecturer: Maria