Waarom jij een ster bent. Letterlijk.


De zuurstof die je inademt, het calcium in je botten, het ijzer in je bloed, het is allemaal ouder dan jij, ouder dan de mensheid, zelfs ouder dan de aarde. Al deze elementen zijn ontstaan in sterren. In feite bestaat jouw hele lichaam uit sterrenstof.

In het begin van het universum - volgens de gangbare theorie - waren er eigenlijk maar twee soorten elementen: helium en waterstof, de twee lichtste. Deze waren verspreid in wolken van gas. Aangetrokken door zwaartekracht begonnen sommige van deze wolken steeds dichter en dichter te worden. Hierdoor werd de zwaartekracht nog groter en werden de wolken nog dichter.

Uiteindelijk werd de zwaartekracht en de druk zo hoog dat de elementen begon te fuseren: de geboorte van een ster. Bij deze kernfusie veranderen de elementen. Twee lichte elementen vormen een zwaardere: zo vormt waterstof helium, helium koolstof en koolstof zwaardere elementen. Op deze manier ontstonden de verschillende lichte en middelzware elementen.

Dit proces, dat ook wel Nucleosynthese wordt genoemd, gaat door totdat ijzer wordt gevormd. Dit betekent het einde van een ster, omdat de vorming van zwaardere elementen dan ijzer energie kost ipv oplevert. Dit doorbreekt het evenwicht van de naar binnen gerichte zwaartekracht en de naar buiten duwende kernreacties van een ster met een enorme explosie als gevolg. Door de enorme krachten die hierbij vrijkomen worden de zware elementen zoals goud en lood gevormd.

Op deze wijze ontstonden in het heelal wolken van materiaal, nog altijd voornamelijk waterstof en helium, maar nu ook met de andere elementen daartussen. Uit het waterstof en helium ontstonden nieuwe sterren, uit de andere elementen werden de planeten gevormd, zoals ook de aarde. Wil je hier mee over lezen, klik dan hier en hier.

De gehele aarde, maar ook alles op aarde, bestaat dus uit de elementen die geboren zijn in een ster of zijn ontstaan bij een ontploffing ervan. En dus ook jouw en mijn lichaam. Denk daar maar eens aan als je de volgende keer in de spiegel kijkt of tegenover iemand zit. Wij zijn allemaal sterrenstof:



Sonatin Clementi
#sonatine #clementi #classicmusic #music #pianomusic #piano #onlyplan #yoorsaudio In this Yoors audio recording you hear a Sonatine by Clementi consisting of three parts. They were played by me on the piano. I love sonatins very much. And from Clementi they are also temperamentous alternating with integrity. And that attracts me very much to play it. They are also very good and challenging finger exercises for piano. I had to practice them a lot in my young years as a little girl to be able to develop well in my piano playing. I had a teacher who really took everything out of it and gave me these kinds of exercises as an assignment time and time again. I also sometimes cursed them those exercises haha, because if you hit even a note wrong, it said “Again!” And then we started all over again from the beginning. Anyway, it works. It's the only way that works for me. Discipline, cheering yourself every time, raging against myself occasionally behind the piano, because the best man hasn't lived for years. But secretly I hear him in my thoughts of “Again! “And then I always have to laugh again, because he was so driven and so am I.. He knew that. Have a lot of listening. So you'll hear three parts in this audio. Warm salute, Madeleine
Buying a good suitcase: How to make the right choice
Buying a good suitcase is important. You only find that when you leave on holiday with the wrong suitcase. That often causes annoying problems. You can best avoid this by choosing a good suitcase adapted to your specific travel conditions. Choosing a good suitcase is not nearly as easy as you think. There is so much choice that it is best to compare the best offers before you make a final decision. What is a good travel suitcase and what should you definitely pay attention to? Are you looking forward to your summer vacation?? Whether you're leaving for a city trip or a faraway holiday, a good suitcase is indispensable. A good travel case is sturdy with the right dimensions and a sturdy yet lightweight material. But a good suitcase meets your expectations so you won't be placed for any annoying surprises. A good suitcase is also safe. You keep all your valuable things with it during your trip. Not only your clothes and everything that makes your holiday pleasant, but no doubt all your travel documents and even your finances. Een goede reiskoffer is stevig en comfortabel During your trips and also at your (holiday) destination, your suitcase will have a lot to endure. So choose a sturdy suitcase made of the right material. You have the choice of multiple materials. Bestseller A good suitcase made of the right material Travel cases come in many materials, each with their specific characteristics and both advantages and disadvantages, such as: Choosing a good travel case from ABS: is flexible, supple but less strong and scratch-resistant. That means that after deformation he quickly regains his original shape. A travel case from ABS is not exactly the lightest case you can take with you. Curv Travel Cases: an ideal companion for those who travel a lot. These cases are sturdy, scratch-resistant. You can also bring more. Curv is een materiaal dat uit meerdere geweven lagen polypropyleen bestaat en oorspronkelijk werd gebruikt voor de productie van kogelwerende vesten. A curv case resists extreme temperatures. Curv is also scratch-resistant and strong, but very pricey. Polycarbonate suitcases: e and polycarbonate travel case is remarkably light yet strong and flexible. This facilitates the packing of your suitcase. A polycarbonate case is similar to a curv case. Polycarbonate is less scratch-resistant and also costs more. Polycarbonate is resistant to higher temperatures, so your suitcase does not deform during your journey. Buying a good suitcase from Polypropylene Polypropylene is the strongest material for travel cases. It is often used for the manufacture of Curv suitcases. A polypropylene travel suitcase is an excellent alternative for those looking for a travel suitcase with the best value for money. Polypropylene cases are very strong but usually heavier. Choose your suitcase Good travel suitcases made of Aluminium Popular travel cases made of aluminum are also suitable for those who are regularly on the move and want to travel stylishly. Aluminum is strong, comfortable, durable and has a luxurious appearance. Aluminum travel cases cost more but are more durable and have a longer lifespan. What you should definitely pay attention to when buying a good suitcase When buying a good suitcase, you need to take into account some important factors in order to avoid a relatively expensive mispurchase. Choose a suitcase with: The correct format: adapted to what you usually take with you on a trip The correct number of wheels: you have the choice between two-wheeled or four-wheeled travel suitcases. The majority prefer four wheels. Such a suitcase is more user-friendly and stays easier. While these four-wheel suitcases are especially suitable on flat terrain and at the airport, two-wheel suitcases can be used on any surface. A good lock: is more important than you think. Do you travel a lot to the US? Then choose a good suitcase with a TSA lock. Then security officers don't have to break open your suitcase.. They have a custom key for that to open this type of lock. Some cases have a built-in TSA lock, but you can also buy them separately. Striking color: Choose a suitcase in a striking colour so you can always easily and quickly recognize it. Convenient travel rolleys Buy a good suitcase: Soft suitcases Choose soft suitcases as much as possible when you're especially taking clothes on a trip. Soft travel cases also have other advantages, such as: Weighing less Are smoother and easier to pack Often opened with a zipper giving them a larger volume Are divided into several compartments and that is convenient to store things separately Budget-friendly Hard suitcases Are especially useful when you take vulnerable cases. Other advantages of these hard cases: Better protection Zijn waterbestendig en houden droog Often equipped with four wheels so you can take them easier and they are more stable Almost unbreakable, they survive the trip at the airport or in the bus so easy. Duurzamer met een langere levensduur Buying a good suitcase: Never save on quality A good travel suitcase is a reliable companion on all your travels. So do not save on quality. Therefore, you should choose not the most expensive one, but the one with the best price-quality ratio. featured