what happens when a star's supply of hydrogen is consumed?
TRANSCRIPT
what happens when a star's supply of hydrogen is confirmedWHAT HAPPENS WHEN A STAR'S
SUPPLY OF HYDROGEN IS CONFIRMED?What happens when a star's
supply of hydrogen is consumed?
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Nuclear changes in the star’s core
It therefore requires 4 hydrogen nuclei (or 4 protons) to produce
1 helium nucleus.The symbol β+, e+ stands for a
positron except that has a positive charge. It is also called
as positive electron, and constitutes the antiparticle of
electron.The symbol ɣ means gamma ray,
and is an uncharged 𝜈elementary particle called
neutrino.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Nuclear changes in the star’s core
According to Einstein’s formula e=mc2 where the amount of
energy release depends on the amount of converted mass
multiplied by the square of the speed of light.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Stellar Nebula
Stellar Nebula is a type of
interstellar cloud,the density and sizeof which permit the
formation of molecules,
most commonlymolecular hydrogen
(H2).
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Low-mass stars
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Average star
An average star is a star predicted or observed to go
through the main sequence life cycle.
It ranges from approximately 0.5-8 solar masses during
the beginning part of its life.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Red giant
A red giant is a big giant star that weighs about one-half to ten times as much as our Sun. Red giants get their name because they appear to be colored red and they are very large. Many red giants could fi t thousands and thousands of suns like ours inside of them. Mira, Aldebaran, Arcturus and Gamma Crucis are red giants.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Red giant
Right now, our Sun is a main-sequence star, not a red giant. However, fi ve billion years from now, scientists believe our sun will become a red giant. It will be about 200 times wider than it is now. It will become so big it will swallow up Mercury, Venus and even the Earth.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Planetary Nebula
A planetary nebula is created when a star blows off its outer layers after it has run out of fuel to burn. These outer layers of gas expand into space, forming a nebula which is often the shape of a ring or bubble.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Planetary Nebula
About 200 years ago, William Herschel called these spherical clouds planetary nebulae because they were round like the planets. At the center of a planetary nebula, the glowing, left-over central part of the star from which it came can usually still be seen.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
White Dwarf
White Dwarf is a hot, small and dense star that is typically the size of a planet Earth. It is formed when a low-mass star has exhausted all its central nuclear fuel and lost its outer layers as a planetary nebula, leaving a glowing core.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
White Dwarf
Some 10 percent of all stars in the Milky Way are white dwarfs, but despite their intrinsic luminosity, they are so small that none are visible to the naked eye.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
High mass stars
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Massive Star
Any star which is larger than 8 solar masses during its regular main sequence lifetime is considered a massive star. They typically have a quick main sequence phase, a short red supergiant phase, and a spectacular death via a supernova explosion.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Red supergiant
A red supergiant is an aging giant star which has consumed its core's supply of hydrogen fuel. Helium has accumulated in the core, and hydrogen is now undergoing nuclear fusion in the outer shells. These shells then expand, and the now cooler star takes on a red color. They are the largest known stars.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Red supergiant
As stars age, they go through var ious phases of their l ives . These phases are so d iverse that i t i s hard to bel ieve that they are a l l just the same star. At var ious points in a star 's l i fe , d iff erent th ings wi l l happen depending on the s i ze of the star. Only large stars with a mass of about 10 so lar units wi l l go on to become red supergiants .
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Supernova
Supernova is a rare celestial phenomenon involving the explosion of a star and resulting in an extremely bright, short-lived object that emits large amounts of energy. Depending on the type of supernova, the explosion may expand the white dwarf and explodes itself, or the stellar core may survive to become a neutron star.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Neutron Star
Neutron star is a celestial object consisting of an extremely dense mass of neutrons, formed by the forcing together of protons and electrons in the collapse of a massive star.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Neutron Star
Most neutron stars rotate very rapidly. Many have powerful magnetic fi elds that focus radio waves, light, and other radiation into two beams that point outward from the magnetic poles.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Black Hole
Black hole i s a p lace in space where gravi ty pul ls so much that even l ight can not get out . The gravi ty i s so st rong because matt er has been squeezed into a ti ny space. This can happen when a star i s dy ing.
what happens when a star's supply of hydrogen is confirmed
• Nuclear changes in the star’s core
The temperature in the core of a star is at least 6 000 000 kelvins
(K)to allow nuclear reactions take
place.Hydrogen is converted into
helium inthree fusion reactions whereby
(a)Mass is converted into energy and
(b) energy is released.Helium nucleus has two protons
andtwo neutrons. The hydrogen nucleus has only one proton.
• Requiem in space: When stars die
Black Hole
Because no l ight can get out , people can't see b lack holes . They are inv is ib le . Space te lescopes with spec ia l tools can help fi nd b lack holes . The spec ia l tools can see how stars that are very c lose to b lack holes act d iff erent ly than other stars .