Brown dwarfs 2 brown dwarfs Asymptotic giant branch 1 Asymptotic giant branch stars 1 Binaries: close 1 Binary star 1 Circumstellar matters 1 Compact objects 1 Dwarf binaries 1 Energy source 1 Evolved stars 1 Gamma rays 1 Gravitation 1 Gravity waves 1 Main sequence stars 1 Orbits 1 Planetary nebulae:general 1 Recombination energy 1 Spiral structures 1 Star: asymptotic giant branch and post-asymptotic giant branch 1 Star: individual: SDSS j1411+2009, SDSS j1205-0242, WD 1032+011, ZTF j0038+2030, WD 0137-349, NLTT 5306, SDSS j1557+0916, EPIC 212235321 1 Stars 1 Stars: individual: proxima Centauri 1 Stars: winds outflows 1 Supernovae 1 White dwarfs 1 binaries: close 1 circumstellar matter 1 planetary nebulae: general 1 stars: AGB and post-AGB 1