Astronomy
IMPORTANT.pdf
New planetary nebulae from IPHAS Romano L.M. Corradi 1,2 Antonio Mampaso 2 & Kerttu Viironen 2 1 Isaac Newton Group of Telescopes, La Palma 2 Instituto.
Hertzsprung Russell (HR) Diagram Spectral Types: Proxy for T eff Or surface temperature
Stars Star field taken with Hubble Space Telescope.
