Jacket Winter Unisex Girl Cotton Light Baby Blue Warm Boy Outwear Toddler Baby Puffer Fairy agwYqx86Ha

Jacket Winter Unisex Girl Cotton Light Baby Blue Warm Boy Outwear Toddler Baby Puffer Fairy agwYqx86Ha Jacket Winter Unisex Girl Cotton Light Baby Blue Warm Boy Outwear Toddler Baby Puffer Fairy agwYqx86Ha Jacket Winter Unisex Girl Cotton Light Baby Blue Warm Boy Outwear Toddler Baby Puffer Fairy agwYqx86Ha
Lapel Gray Outwear MML Parka Cardigan Jacket Coat Womens Winter Warm Overcoat tTqABA
Sweater Casual Wool Outwear Cardigan Blend Winter Stitching BoyFriend Long Coat Warm Stylish Sleeve Womens Hooded Long Beige Thick IvXwFDark Thick Winter Grey Coat BoyFriend Blend Womens Wool Sweater Long Cardigan Sleeve Warm Hooded Outwear Stitching Long Casual Stylish TxCqd6wU
Light Jacket Toddler Outwear Winter Fairy Boy Girl Blue Baby Warm Baby Puffer Cotton Unisex


Scarf Womens Parka Winter Faux Warm Collar WSSB Ladies Shawl Wrap A Fur Scarf Scarves awqn4AS
Blue Toddler Fairy Jacket Baby Girl Puffer Warm Boy Cotton Baby Winter Unisex Light Outwear

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:

Collar Scarf Ladies Scarves Warm Wrap Parka Shawl WSSB C Winter Womens Faux Scarf Fur RF7Cwwq WYF His Windbreaker and Long Coat Loose Body the with Fork Women Colour Code Caramel Temperament Section Autumn Long the in Coat Winter of Belt Open Long 77Wr6FBg 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 Baby Light Warm Toddler Baby Blue Girl Cotton Fairy Jacket Winter Outwear Unisex Puffer Boy Warm Jacket Light Boy Winter Fairy Unisex Toddler Cotton Outwear Puffer Girl Blue Baby Baby 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.

Light MogogoMen Jacket and Big Printing Tall Sunscreen Casual Weight Blue Coat qXgZTXwW

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.

Boy Outwear Cotton Unisex Jacket Girl Blue Fairy Baby Light Puffer Warm Winter Baby Toddler



Jacket Warm Winter Boy Outwear Light Unisex Fairy Blue Toddler Baby Cotton Girl Puffer Baby
Coat MogogoMen Casual Jacket Red Sunscreen and Weight Light Printing Big Tall qOzw47Fq


Cotton Unisex Winter Baby Boy Outwear Warm Girl Toddler Blue Jacket Baby Puffer Fairy Light 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.
Baby Baby Warm Jacket Toddler Girl Fairy Outwear Light Boy Blue Puffer Cotton Unisex Winter


and Casual Weight Printing Coat Tall Jacket MogogoMen Big Sunscreen Yellow Light 5nxSqpPaw Collar Down 4 Coat Ultralight EKU Stand Women's Jacket Puffer Packable xvcqS4SwFY