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How long does co2 remain in the atmosphere
because of the tilt in the earths access
A "Star" can be anything from the beginning of a stars life (Protostar) up until it has died and only it's remnants remain (White dwarf, neutron star, black hole). However, for this question, we will assume that a "star" is when it is fusing hydrogen into helium, which is what most stars we see, including the Sun are doing. A protostar is the first stage in a stars life (See related question) whereas a "star" in this question is when there is enough pressure and thus temperature for the star to star fusing hydrogen into helium and it joins the main sequence - thus becoming a star (See related question)
The "main sequence" basically consists of all those stars that fuse hydrogen-1, converting it into helium-4. A massive star will remain in the main sequence while it has enough hydrogen-1; but since it gets hotter and burns its fuel much faster, it may stay there only for a fairly short time - in the case of the most massive stars, just a few million years.
biosphere,lithosphere,hydrosphere,atmosphere
Hydrogen rises above our atmosphere to the outer limit and then gets blown away by 'solar wind'. So it is decreasing.
No. Steam is simply water in a gaseous state. The hydrogen and oxygen remain chemically bonded to one another.
Normal "main sequence" stars fuse hydrogen into helium during most of the star's life. The core of a star gets so hot that the hydrogen atoms begin to fuse together. As hydrogen only has 1 proton when if fuses with another hydrogen atom it has 2 protons so has become helium.
The Sun is made up mainly of hydrogen, less helium, and small amounts of heavier elements. Four hydrogen atoms fuse to from one helium atom, in this process a lot of energy & heat is released. The sun will remain stable until the whole hydrogen is converted into helium. When the total hydrogen is exhausted energy production stops in its core and thus the core starts shrinking.
It will remain as reductive atmosphere. Ther will be only gases like NH3, H2 , H2S. H2O. There would be no life
liquid nitrogen will not freeze everything. Hydrogen and helium will remain a gas when exposed to liquid nitrogen.
The sun is not made of rock. It is made mostly of the gasses hydrogen and helium. The sun is far too hot for anything to remain solid.
No. Stars are made mostly of hydrogen and helium and are too hot for any sort of rock or ice to remain solid.
Hydrogen remain hydrogen.
How long does co2 remain in the atmosphere
Yes. It will eventually. The sun has enough hydrogen in its core to remain as a main sequence star for about 5 billion years. After that it will alternate between fusing helium in its core and hydrogen in a shell around the core for about 2 billions. Then it will shed its outer layers and leave behind a degenerate remnant called a white dwarf.
Helium will contract in cold weather, but that may not cause a balloon filled with it to sink since the air will also contract - and by about the same amount - so the relative densities of the helium and the surrounding are would remain about the same and the buoyancy of a helium filled balloon would remain