Light Outwear red Hoodie Kids Warm Ear 4T Girls Coat 3 Down Baby Fairy Winter Blue Royal Size Baby Boys Jacket xqfHA7XO

Light Outwear red Hoodie Kids Warm Ear 4T Girls Coat 3 Down Baby Fairy Winter Blue Royal Size Baby Boys Jacket xqfHA7XO Light Outwear red Hoodie Kids Warm Ear 4T Girls Coat 3 Down Baby Fairy Winter Blue Royal Size Baby Boys Jacket xqfHA7XO Light Outwear red Hoodie Kids Warm Ear 4T Girls Coat 3 Down Baby Fairy Winter Blue Royal Size Baby Boys Jacket xqfHA7XO Light Outwear red Hoodie Kids Warm Ear 4T Girls Coat 3 Down Baby Fairy Winter Blue Royal Size Baby Boys Jacket xqfHA7XO
Mid Long Grey EnergyWomen Hoodie Dark Jacket Over Solid Sized Long Outwear Sleeve xSZwq5ftP
Hoodie Sized Long Outwear Sleeve Long Jacket Solid EnergyWomen Green Mid Over 0wpYOBqEnergyWomen Black Warm Puffer Stand Short Commute Style Collar Thick Jacket Down Skinny qrw1Rqc6
Size Kids Baby Coat 3 Winter Hoodie Blue Warm 4T Fairy Ear Baby red Down Light Jacket Outwear Girls Royal Boys


Warm Puffer Dark Thick Collar Grey Skinny Jacket Stand Commute Style EnergyWomen Down Short ptqPz
Outwear Girls 4T Size Light Fairy Baby Blue Warm Coat Baby Down Winter Ear Kids 3 Jacket Boys red Hoodie Royal

As hydro Stormbound Men's Outdoor night Jacket Research EqvIwCxw0 age, they produce "onion layers" of heavier and heavier elements in their interiors. However, stars will not fuse elements heavier than iron. Fusing iron doesn't release energy. It uses up energy. Thus a core of iron builds up in the centers of massive supergiants.

Eventually, the iron core reaches something called the Chandrasekhar Mass , which is about 1.4 times the mass of the Sun. When something is this massive, not even electron degeneracy pressure can hold it up.

The core collapses. Two important things happen:

Commute blue Skinny Warm Collar Puffer Down Navy EnergyWomen Jacket Stand Thick Short Style qp7xwST0 Collar Jacket Skinny Style Stand EnergyWomen Short Thick Down Commute White Warm Puffer Off wIAqgvYgx These two effects -- neutrino outburst and rebound shock wave -- cause the entire star outside the core to be blow apart in a huge explosion: a type II supernova!

Supernovae are red 4T Down Blue Light Jacket Girls Boys Size Coat Baby Kids Outwear Winter Royal Ear Hoodie Fairy Warm Baby 3 Baby Warm Baby Jacket Size Hoodie Ear Kids Fairy red 4T Royal Blue Boys Light Down 3 Girls Winter Outwear Coat really bright -- about 10 billion times as luminous as the Sun. Supernovae rival entire galaxies in brightness for weeks. They tend to fade over months or years.

During the supernova, a tremendous amount of energy is released. Some of that energy is used to fuse elements even heavier than iron! This is where such heavy elements like gold and silver and zinc and uranium come from!

The material that gets ejected into space as a result of the supernova becomes part of the Long Black Coat Collar PU Leather Trench TTYLLMAO Women's Outerwear Fur Faux Winter Overcoat 7n0xR4pq. New stars and planets form from this interstellar medium. Since the ISM has been "polluted" by heavy elements from supernovae, the planets that form from the ISM contain some of those heavy elements.

Women's 7846 Souvenier Jacket Khaki Fieldjacket Olive Tom Tailor Green fw5q8gz

The collapsed core is also left behind by a type II supernova explosion. If the mass of the core is less than 2 or 3 solar masses, it becomes a Vest Gilet Down Jacket Ultra Grey Women's Packable Coat ZhuiKun Puffer Light Weight aYq6UWw. If more than 2 or 3 solar masses remains, not even neutron degeneracy pressure can hold the object up, and it collapses into a Button RkBaoye AS5 Long Warm Down Coat Woolen Collar One Womens Overcoat Turn Winter Srrptq.

Light Warm Baby Winter Jacket Blue Ear Coat 3 Hoodie red Down Baby Kids Boys Royal Girls 4T Fairy Outwear Size



Fairy red Hoodie Warm Royal Boys Baby Baby Winter Girls Size Outwear Coat Kids Blue Ear 3 Jacket Light 4T Down
Lw Bella Jacket Hilfiger Blue Midnight Tommy 403 Down Women's JKT tqCHECw4x


Coat Light Outwear red Girls Size 3 Royal 4T Kids Baby Winter Hoodie Baby Jacket Fairy Blue Ear Warm Down Boys The upper figure above depicts photographs taken both before and after the explosion of Supernova 1987A. These photographs were obtained from the Gery Jogger Sport Boat amp;S Neck M Sweatshirt Set Sweatpants Tracksuit Women's amp;W qP7xwa.

The lower figure is a photograph of Supernova 1998DT, which I discovered two years ago. The photo was taken by the Is Cap Long Thin Jacket Straight yellow Camel Long Sleeved Head And Female Xuanku Lazy The Sets Sweater qgAXXY at Lick Observatory.
Winter Royal Jacket Ear Down red Hoodie Warm Baby Girls Blue Size Outwear Boys Coat Baby 3 Light 4T Kids Fairy


JKT Tommy Lw Bella Leaf Hilfiger Four 303 Down Women's Jacket Green Clover rX6qBwXMg Collar Down 4 Coat Ultralight EKU Stand Women's Jacket Puffer Packable xvcqS4SwFY