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Jupiter is composed of a relatively small rocky core, surrounded by metallic hydrogen, with further layers of liquid hydrogen and gaseous hydrogen. There is no clear boundary or surface between these different phases of hydrogen; the conditions blend smoothly from gas to liquid as one descends.
Originally posted by Nyte Angel
Thx Toasty But one more question remains, how did earth end up being within the 3 % that it needs to not be frozen, but the 3% to not be a scoldering piece of lava? its so close that its just not right, and why is it that the gas giants are considered planets? cause there practically all gas nayways thx again toasty, try to answer these ones also
The fifth planet from Sol at 5.2 times the Earth-Sun distance, Jupiter is the largest planet in the Solar System and so is visible in the night sky. Holding almost 318 times the mass of the Earth, it is more than twice as massive as all the other planets combined, with an equatorial diameter of 142,800 km (88,700 miles) that is more than 11 times wider than Earth's. Jupiter is so big that it is close to the maximum diameter possible for a gas planet. If the mass of many more Jupiters were dumped on the planet, it would only get slightly bigger because of increased gravitational compression. Although stars can be larger because the heat of nuclear fusion at their cores works against compression, Jupiter is actually much too "light" to ignite hydrogen fusion like a star.
Jupiter has only about 1/1,000th of Sol's mass, but it would have become a star if it was perhaps only 75 times more massive than it is. However, Jupiter is even too small to meet one of today's definition of a substellar brown dwarf because it can't even fuse deuterium (hydrogen nuclei composed one neutron as well as one proton) like young brown dwarfs that have accumulated at least 13 times the mass of Jupiter can.
Astronomers have found the tiniest full-fledged star known, an object just 16 percent bigger than Jupiter. It is smaller than some known planets that orbit other stars.
The star is a companion to a Sun-like star toward the center of our Milky Way Galaxy. It was found and measured by observing changes in the light output of the system when the smaller star passes in front of the larger star from our vantage point.
The discovery helps astronomers better understand a gray area of definition concerning stars and planets.
Between planets and stars, there exist odd objects called brown dwarfs. They're often referred to as failed stars, because they don't have enough mass to trigger the thermonuclear fusion that powers real stars, like the Sun. A brown dwarf is typically several times the mass of Jupiter, but astronomers haven't determined the exact size or mass cutoffs on either end.
Originally posted by Nyte Angel
thx guys . But teh question still remains, what woudlo have happened? think hypthetically please. Like what would be of all the other planets? Please answer this question
Originally posted by Toasty
If Jupiter decided to become a star today (not possible) then you can pretty much say bye bye to the solar system and it current orbital patterns.
Originally posted by jra
Europa, which is covered in ice, would more than likely completely melt. The water might even become completely evaporated off it's surface (again, depending on how hot a Jupiter sun would be), although Europa is tidal locked, so only one side faces Jupiter at all times. So the far side might stay cool.