When did humans learn that the Earth is not the center of the universe? All stars come from humble beginnings: namely, a gigantic, rotating clump of gas and dust. Post was not sent - check your email addresses! The Fraunhofer lines in the solar spectrum are actually: Night and day have approximately equal length at what time or times of the year? See no ads on this site, see our videos early, special bonus material, and much more. https://podcasts.apple.com/ca/podcast/space-nuts-astronomy-space-and-science-news/id1080090608, Our Book is out! And More…, Episode 688: Remnants From the Early Universe. Back in 1980, the late Carl Sagan blew minds with the deep thought that those very minds are made from the remnants of blown-up stars. European Space Agency and Justyn R. Maund (University of Cambridge), Discuss: 'We are made of star stuff': A quick lesson on how, Evidence of the Big Bang found in a cosmic 'double rainbow', Astronomers track down oldest known star in the universe, The biggest thing in the universe is really, really big. https://www.cnet.com/news/we-are-made-of-star-stuff-a-quick-lesson-on-how B) Cosmic rays reaching Earth from distant astronomical sources may be one source of mutations that help evolution along. Recall that massive stars, many times larger than our sun, spent millions of years turning energy into matter, creating the atoms that make up every part of you, the Earth, and everyone you have ever known and loved. A) within the past 500 years B) about 2,500 years ago C) ab... What is the angular resolution of the human eye? Unsurprisingly, the story is both elegant and profoundly awe-inspiring. Elements beyond (heavier) than helium are created within the cores of stars. https://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G, Weekly email newsletter: Relative to the age of the universe, how old is our solar system? Given the right conditions – for instance, an appropriately stable star and a position within its Habitable Zone – these elements provide the building blocks for complex life. https://www.universetoday.com/newsletter, Weekly Space Hangout: Approximately how fast are you moving with the rotation of Earth? https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg/, Astronomy Cast: Eventually, the star-to-be becomes so dense and hot that molecules of hydrogen in its core collide and fuse into new molecules of helium. Hydrogen condensed (under gravitational forces) to form … Follow us on Twitter: @universetoday Primordial Black Holes, Episode 687: Open Space 89: Scott Gaudi and the HabEx Mission, Episode 685: Open Space 88: UFO Culture with Author Sarah Scoles, Episode 684: Open Space 87: What Would It Take to Terraform Venus, And More….

Why does Carl Sagan say that we are star stuff? Gravity drives the cloud to condense as it spins, swirling into an ever more tightly packed sphere of material. We are made of star stuff.” – Carl Sagan. When did humans learn that the Earth is not the center of the universe? Karla Thompson – @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw Heavier stars also occasionally falter in the fight between pressure and gravity, creating new shells of atoms to fuse in the process; however, unlike smaller stars, their excess mass allows them to keep forming these layers.
But their collapse heats things up, increasing the core pressure and reversing the process once again. Such massive stars act like a furnace, driving these reactions by way of sheer available energy. The reference that Carl was making was to the origin of the elements.

https://www.amazon.com/Universe-Today-Ultimate-Viewing-Cosmos/dp/1624145442/, Audio Podcast version:

Our ability to do anything at all – wake up from a deep sleep, enjoy a delicious meal, drive a car, write a sentence, add and subtract, solve a problem, call a friend, laugh, cry, sing, dance, run, jump, and play – is governed mostly by the behavior of tiny chains of hydrogen combined with heavier elements like carbon, nitrogen, oxygen, and phosphorus. Hydrogen in the core gives rise to helium. Just in time for Sagan's birthday on November 9, the American Association of Chemistry Teachers (AACT) and author Sam Kean teamed up to produce the below video to shed a little light on Sagan's iconic turn of phrase and what it really means. Density increases exponentially in the shrinking core, jamming together protons and electrons so tightly that it becomes an entirely new entity: a neutron star. Over time, however, falling hydrogen levels at the center of the star cause fewer hydrogen fusion reactions; fewer hydrogen fusion reactions mean less energy, and therefore less outward pressure. A) Stars are fixed and ... Pensacola, Florida lies at a latitude of 30 degrees north.


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