Lava cascades indigenous Mauna Ulu flow down right into Alae crater, Kilauea, Hawaii, joined States. Photo credit: USGS.

Generally speaking, the answer to this one is yes: and also we have a little bit of a hint already from the phase of matter they’re each in.

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Stars, generally speaking, space made that plasma; a state of matter so energetic that the electrons and protons which normally comprise a hydrogen atom have separation apart and also are careening turn off of points separately. Lava, through contrast, is a liquid. It’s a weird, particularly viscous liquid, however fundamentally it’s molten rock, and also is as such technically a liquid till it cools.

Your usual star, a ring blob of plasma in space, generates heat and light through fusing elements in that is core. Usually speaking, this is the fusion of hydrogen into helium. The temperature of the star is managed by the rate at which blend occurs in the core. The quicker helium is accumulated from hydrogen, the much more light is produced, and the hotter the star overall.

That combination rate, in turn, is managed by the mass of the star. The an ext massive the star, the much more it can compress material down into greater densities at its core, and also it’s this boost in thickness that results in a faster fusion process.

So as soon as we’re comparing the temperature that stars come the temperature of lava, the precise results will certainly vary depending on how huge your star is. However, for any type of star i beg your pardon is fusing hydrogen right into helium, even the lowest mass stars which room the coolest the the lot, the surface temperature (defined together the suggest at which irradiate is able come stream easily into space) is quiet much, lot hotter than the temperature the the sexy lava top top Earth.


The surface temperature of the Sun, i m sorry is an mean mass star, is about 5500 levels Celsius. A red dwarf star, the coolest that the stars that have the right to fuse hydrogen, sit at around 3000 C. Lava normally checks in at a temperature somewhere between 700 degrees and also 1200 degrees. In ~ its hottest, lava is only half the temperature the the surface of the dimmest stars.

There are, however, stellar objects i m sorry do fall within the temperature variety of lava, despite they’re not taken into consideration full stars. This is the brown dwarf class; they aren’t able come fuse hydrogen right into helium v the traditional pathway, due to the fact that they’re not massive enough to compress your cores down into the temperatures and pressures compelled to create a fusion reaction. But they room still warm (both loved one to the vacuum that space, and on human terms).


Brown dwarfs expectations the room between a specifically massive planet and the the smallest hydrogen burning stars. Since they space so much less massive, the the smallest brown dwarfs have the right to be lava-temperatures at their surfaces. There are three broad classes the brown dwarfs; L, T & Y dwarfs. Together dwarfs space still maintaining surface temperature of about 1400 levels C - the T dwarf is cooler again, at 900 levels Celsius, now firmly in ~ the realm of the temperature of molten lava. And also the Y dwarf check in at just 300 degrees Celsius. The coldest Y dwarfs space within the range of temperatures us encounter in non-lava scenarios on planet - somewhere in between 40 and 90 levels C. This is a drinkable temperature.

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So if the celestial objects we take into consideration “stars” will constantly win in a game of “which is hotter”, if you desire to include the coolest brown dwarfs, lava deserve to win out.

The trick through a brown dwarf is that these objects room no much longer furious balls of plasma, as is true of our Sun. The boundaries in between a an extremely low mass brown dwarf and also a high massive Jupiter-like earth are quite fuzzy, and also so the faintest and coolest brown dwarfs space expected to be shrouded in a Jupiter-style layer of special clouds. It’s this cloud great that we see once we observe them native Earth, and so while their cores might still it is in plasma, the external layers are simply warmth gas.