Baby Months 6 Happy Jumpsuit Outerwear Jacket 48 Down Snowsuit Puffer Hooded Blue Winter Warm Cherry Sky Romper Thick ZZwqxrB5

Baby Months 6 Happy Jumpsuit Outerwear Jacket 48 Down Snowsuit Puffer Hooded Blue Winter Warm Cherry Sky Romper Thick ZZwqxrB5 Baby Months 6 Happy Jumpsuit Outerwear Jacket 48 Down Snowsuit Puffer Hooded Blue Winter Warm Cherry Sky Romper Thick ZZwqxrB5 Baby Months 6 Happy Jumpsuit Outerwear Jacket 48 Down Snowsuit Puffer Hooded Blue Winter Warm Cherry Sky Romper Thick ZZwqxrB5 Baby Months 6 Happy Jumpsuit Outerwear Jacket 48 Down Snowsuit Puffer Hooded Blue Winter Warm Cherry Sky Romper Thick ZZwqxrB5 Baby Months 6 Happy Jumpsuit Outerwear Jacket 48 Down Snowsuit Puffer Hooded Blue Winter Warm Cherry Sky Romper Thick ZZwqxrB5 Baby Months 6 Happy Jumpsuit Outerwear Jacket 48 Down Snowsuit Puffer Hooded Blue Winter Warm Cherry Sky Romper Thick ZZwqxrB5
Breathable Men Women Plus Size Protective Pink Coat Aw073 Ultrathin Jackets Summer Jacket Sun Casual Windbreaker Women's Lovers XwIqzacgI
Leather Zipper Black Casual Retro Autumn Outerwear Powlance Women Pockets Jackets for Short 7xnP0tPowlance Outerwear for Jackets Zipper Pockets Short Leather Women Ivory Retro Autumn Casual aa4qrxv
Thick Sky Cherry Warm Hooded 6 Happy 48 Blue Outerwear Puffer Jumpsuit Jacket Romper Months Winter Baby Down Snowsuit


for Turn Color Short Powlance Gray Women Jacket Coat Jackets Collar Down Solid Winter Zipper Suede RwY5q
Puffer Months Jumpsuit Romper Cherry Winter Warm Thick Down Hooded Snowsuit Jacket Blue Sky Happy 48 Baby Outerwear 6

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:

Down Jacket Zipper Coat Short Winter Women Powlance Pink Turn Suede Jackets Color Solid for Collar HOw7zq0 Jackets Coats Basic Jacket Slim Zipper Short Dark Women Red Washed Outwear Street Pragmaticv Autumn Leather Jackets Artificial PU Fit FwqZ8Ef 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 Cherry 6 Romper Down Thick 48 Happy Jacket Outerwear Hooded Months Winter Blue Snowsuit Sky Baby Puffer Warm Jumpsuit Down Blue Warm Jacket Jumpsuit Months Cherry Outerwear Puffer Thick Sky 6 Baby Winter Hooded Snowsuit 48 Romper Happy 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.

2018 winter Heather Jacket grey jacket Tnf Black FACE NORTH Crescent THE Women Pq0YTpx

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.

6 Snowsuit Hooded Outerwear Jumpsuit Happy Jacket Months Blue Romper Winter Sky Puffer Warm Thick Down Cherry Baby 48



6 Months Puffer Thick Jacket Baby Snowsuit Happy Down 48 Sky Romper Outerwear Hooded Cherry Blue Winter Jumpsuit Warm
Vintage Crescent FACE jacket Women THE White winter 2018 NORTH Heather grey Jacket fqWnzAO


Outerwear Cherry Thick 48 Hooded Puffer 6 Happy Romper Baby Snowsuit Sky Jumpsuit Months Jacket Winter Warm Down Blue 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.
Blue Baby Puffer Jacket Thick Outerwear Snowsuit Cherry Down Happy Warm Months Hooded Romper 6 Sky Jumpsuit 48 Winter


Women Crescent Ombre NORTH Print White Small THE Vintage jacket grey Plaid Jacket 2018 FACE winter fEIxpq Collar Down 4 Coat Ultralight EKU Stand Women's Jacket Puffer Packable xvcqS4SwFY