Tarmalyulan Stars are a specific breed of stars that can only form in the polar jets of the Tarmalyula Galaxy. They always have a plethora of planets, but rarely have gas giants. They will always burn with the brightness of exactly 1.8203342 standard luminosities, regardless of the mass or temperature.
Tarmalyulan Stars form in the polar jets of the Tarmalyula Galaxy, spewing from the white hole situated at the centre of the galaxy. They are relatively common here - about 1 in every 20 stars is a Tarmalyulan Star.
Tarmalyulan Stars form the same way as every other star - accrettion of a vast amount of gas. Despite the fact that some Tarmalyulan Stars have masses of millions of suns (in the most extreme cases) they always burn at a luminosity of 1.8203342. This is advantageous for smaller stars, stars that would become yellow, orange or red dwarfs, for they can host multiple habitable worlds, but for stars that would have become white dwarfs, white or blue giants, or supergiants, it decreases the likelyhood, as the gravity of the star does not change. For the aforementioned extreme, it is on the brink of blackholedom.
Tarmalyulan Stars usually form with many planets, ranging from 3 (least amount documented) to 42 (most amount documented). This is due to the amount of material ejected by the white hole at the centre of the galaxy. It is split exactly equal in all elements, so the mass of the hydrogen and helium parts of the star are way outweighed by the mass of the heavier elements that also accreted together. This means that Tarmalyulan Stars always have many planets, usually on crowded orbits.
As mentioned above, Tarmalyulan Stars usually have many planets because of the material that they accreted with. But this also means that the star itself is around 80% metal, a extraordinary amount. And yet it still undegoes nuclear fusion, turning hydrogen into helium and so on. How? No-one knows. It is being investigated, but results are inconclusive due to lack of funding.