Astronomers reveal new details of supernova remnants and potential second-generation planets

Astronomers have utilized the Gemini North telescope in Hawaii to capture high-resolution images of the supernova remnant Pa 30. Located approximately 7,500 light-years from Earth, the remnant features unique, pearl-like chains of gas clumps rather than smooth filaments. This structure is characteristic of a rare Iax-type supernova, which may involve the collision of two white dwarfs and leaves behind a central stellar remnant, often referred to as a ‘zombie star’. The remnant is notable for its potential connection to historical astronomical observations recorded in China, Japan, and Arabia in 1181.

In a separate study involving the white dwarf HS 0209+0832, researchers from the University of Warwick re-analyzed archival data from the Hubble Space Telescope. They identified an unusual chemical signature of niobium, suggesting the possible existence of a second-generation planet. This theoretical planet, potentially similar in size to Jupiter, may have formed from the material ejected during the star's transition into a white dwarf. Data from NASA's TESS satellite also indicated periodic brightness changes, supporting the hypothesis of a celestial body orbiting the white dwarf at a distance of approximately 6 million kilometers.