Are there Higgs bosons in the Sun? To find the Higgs boson, we had to build the biggest machine mankind has ever built: the LHC with a collision energy of up to 14 TeV. Inside the sun there is a huge pressure and temperature, but is the energy density high enough for Higgs bosons to be created?
 A: Notwithstanding the previous answers, bear in mind that the Higgs boson fields is pervasive throughout the whole universe, according to the Standard Model of particle physics. 
The interaction between the Higgs field and the matter fermion fields (quarks, electron, muon, etc) provides the fermions with mass. This means that there are virtual Higgs bosons everywhere. 
Now, observing a Higgs boson requires more complex operations and energy because the boson is no more virtual as a quantum fluctuation of its field, and because you want to detect the boson with a device. 
This kind of device would not last very long in the solar plasma though ;-)
A: You probably know that the mass of the Higgs boson is around $125$ GeV, which means the energy it takes to create a Higgs boson is around $125$ GeV and therefore that the temperature at which significant numbers of Higgs bosons will be created will be given by $kT = 125$ GeV. One GeV is $1.602 \times 10^{-10}$J, so the corresponding temperature is around $10^{13}$K - note that this is an order of magnitude estimate.
Anyhow, the temperature at the centre of the Sun is around $10^7$ K, so it's six orders of magnitude too low to create significant numbers of Higgs bosons.
Even a supernova only gets to a temperature of about $10^{11}$K, which is still two orders of magnitude too low.
