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Massive stars fuse heavier elements in their cores than lower mass stars. This leads to the creation of heavier elements up to iron. Iron robs critical energy from the core, causing it to collapse. The shock wave, together with a huge swarm of neutrinos, blast through the star’s outer layers, causing it to explode. The resulting supernova creates even more heavy elements, scattering them through space. Also, happily, we’re in no danger from a nearby supernova.
Crash Course Astronomy Poster: http://store.dftba.com/product....s/crashcourse-astron
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Table of Contents
Massive Stars Fuse Heavier Elements Up To Iron 1:15
Iron Uses High Amounts of Energy, Thus Making Stars Collapse 3:58
The Resulting Supernova Creates Even Heavier Elements 10:00
Relax, Something Else Will Kill You 9:04
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PHOTOS/VIDEOS
Blowing Bubbles http://chandra.harvard.edu/res....ources/animations/pn [credit: NASA/CXC/April Jubett]
The Sizes of Stars http://www.eso.org/public/images/eso1030c/ [credit: ESO/M. Kornmesser]
Red giants https://commons.wikimedia.org/....wiki/File:Redgiants. [credit: Wikimedia Commons]
Alpha Orionis http://imgsrc.hubblesite.org/h....u/db/images/hs-1996- [credit: A. Dupree (CfA), NASA, ESA]
Sun and VY Canis Majoris https://commons.wikimedia.org/....wiki/File:Sun_and_VY [credit: Wikimedia Commons]
Witch Head Nebula and Rigel http://www.deepskycolors.com/a....rchive/2009/11/16/wi [credit: Rogelio Bernal Andreo]
Layers of a massive star https://en.wikipedia.org/wiki/....User:FT2/scc#/media/ [credit: Wikimedia Commons]
NASA's Swift Reveals New Phenomenon in a Neutron Star http://www.nasa.gov/mission_pa....ges/swift/bursts/new [credit: NASA's Goddard Space Flight Center]
What is a black hole? http://www.nasa.gov/audience/f....orstudents/k-4/stori [credit: NASA/CXC/M.Weiss]
The Death of Stars http://www.spacetelescope.org/....videos/hubblecast52a [credit: ESA/Hubble]
Giant Mosaic of the Crab Nebula http://www.nasa.gov/multimedia..../imagegallery/image_ [credit: NASA, ESA, J. Hester (Arizona State University)]
Hubble and Chandra spot a celestial bauble http://www.spacetelescope.org/images/heic1018b/ [credit: NASA, ESA, the Hubble Heritage Team (STScI/AURA), and NASA/CXC/SAO/J. Hughes]
Vela Supernova Remnant http://www.glitteringlights.co....m/Images/Nebulae/i-p [credit: Marco Lorenzi]
Spica [credit: Phil Plait]
Cassiopeia A https://en.wikipedia.org/wiki/....Cassiopeia_A#/media/ [credit: Oliver Krause (Steward Observatory) George H. Rieke (Steward Observatory) Stephan M. Birkmann (Max-Planck-Institut fur Astronomie) Emeric Le Floc'h (Steward Observatory) Karl D. Gordon (Steward Observatory) Eiichi Egami (Steward Observatory) John Bieging (Steward Observatory) John P. Hughes (Rutgers University) Erick Young (Steward Observatory) Joannah L. Hinz (Steward Observatory) Sascha P. Quanz (Max-Planck-Institut fur Astronomie) Dean C. Hines (Space Science Institute)]
Sloshing Supernova http://svs.gsfc.nasa.gov/cgi-b....in/details.cgi?aid=1 [credit: NASA's Goddard Space Flight Center Video and images courtesy of NASA/JPL-Caltech]
Star Burst http://svs.gsfc.nasa.gov/cgi-b....in/details.cgi?aid=1 [credit: NASA's Goddard Space Flight Center Video courtesy of ESA/Hubble/L. Calcada]
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I had the chance to sit down with Alexander Sora, the creator of Unicorn Platform, which he sold to John Rush for $800,000. We dive into the story behind that acquisition, what it felt like to go through it, and everything that came before.
Alexander also built 8+ directories, including one that sold for $10k.
His approach to building directories is completely different from mine. While I focus on SEO-driven, location-based directories, Alex builds around his own pain points often in product-focused niches. He doesn’t rely on SEO the way I do, which makes for a really fun contrast in our philosophies.
This is a super casual conversation where we bounce between directories, startup life, bootstrapping, finding purpose after selling a business, and what’s next for him.
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𝕏 Follow me on 𝕏 @freychu
𝕏 Follow Alexander on 𝕏 @alexanderisorax
Timestamps
03:47 How Alexander built & sold his directory for $10k
11:40 How Alexander drives traffic to his directories
12:24 The problem Alexander solved with his directory
13:43 Finding ideas by “scratching your itch”
17:14 How Alexander approach product-based directories (Data collection + build)
20:31 Other directories Alexander has built
23:55 The story behind Unicorn Platform
27:00 Thoughts around vibe coding
30:59 Most builders fail a lot before hitting success - what # of business was Unicorn platform?
32:26 Should you quit your job, then build a startup?
36:21 Loss of purpose + His viral tweet after selling UP for $800k
38:32 Lifestyle inflation + Why Alexander chose to stay frugal
41:24 What Alexander’s working on next (UP for video)
🔧 Tools FAQs:
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Which google maps scraper do you use? https://outscraper.com/refer?referrer...
How do you automate data enrichment? https://www.enrich.directory
What CMS and plugins do you use? Wordpress, Elementor Pro and a combination of Geodirectory or JetEngine + WP All Import
