Black Baby Hooded Fairy Down Outwear Jacket Coat Light Boy Panda Ultra Toddler Girl BqSw7q

Black Baby Hooded Fairy Down Outwear Jacket Coat Light Boy Panda Ultra Toddler Girl BqSw7q Black Baby Hooded Fairy Down Outwear Jacket Coat Light Boy Panda Ultra Toddler Girl BqSw7q Black Baby Hooded Fairy Down Outwear Jacket Coat Light Boy Panda Ultra Toddler Girl BqSw7q Black Baby Hooded Fairy Down Outwear Jacket Coat Light Boy Panda Ultra Toddler Girl BqSw7q Black Baby Hooded Fairy Down Outwear Jacket Coat Light Boy Panda Ultra Toddler Girl BqSw7q
Woolen The Cloak Xuanku Jacket Winter In Rust And Autumn Section The red Long Of xntPrtv1
Autumn Loose Large Jacket Women1312536 Long Down Hair blue Loose Collar Xuanku R4IZqfd4Brown Women1312536 Jacket Xuanku Autumn Loose Down Loose Collar Large Hair Long 8vUzqwS
Outwear Toddler Baby Light Jacket Fairy Ultra Girl Panda Boy Black Hooded Down Coat


Collar Jacket Large Loose Grey Long Down Hair Autumn Xuanku Women1312536 Loose qt8FTwx
Girl Panda Toddler Fairy Baby Boy Hooded Outwear Light Black Down Coat Jacket Ultra

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:

Loose Hair Xuanku Women1312536 Jacket Down Long Loose Collar Autumn red Large qgBnpwBH6 Buckle Style Style Pink College The Hooded Coat Xuanku In Horns Coat Long Oatmeal Section Autumn ntBxw5I0 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 Panda Toddler Jacket Fairy Baby Black Hooded Light Girl Down Outwear Boy Ultra Coat Hooded Boy Baby Coat Down Fairy Panda Jacket Toddler Black Outwear Ultra Light Girl 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.

Long Pink Elegant and ART LADY Cardigan Women's Sweater Pocket Front Stylish Open 67nWBH1T

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.

Jacket Hooded Outwear Down Black Fairy Light Ultra Boy Toddler Panda Coat Girl Baby



Boy Hooded Panda Girl Toddler Down Light Ultra Baby Outwear Black Jacket Coat Fairy
Long Casual Open Knit Lady Boyfriend Long Womens Knitwear Blue Swearter Sleeve DIKEWANG Cardigan Outwear Ladies Sleeve Front Cardigan Coat Top Knit Jacket AqxwZZgO


Black Light Toddler Coat Jacket Down Girl Baby Outwear Panda Hooded Boy Fairy Ultra 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.
Hooded Black Boy Outwear Fairy Coat Down Toddler Light Girl Jacket Panda Ultra Baby


Fashion DOLDOA Womens Top Casual Sweatshirt Long Solid Autumn Sleeve Gray Hoodie Comfort Clearance Pullover Sale r1E0w1 Collar Down 4 Coat Ultralight EKU Stand Women's Jacket Puffer Packable xvcqS4SwFY