Photosphere but more tenuous corona. Other "surface features" on the photosphere are solar flares and sunspots. Photosphere The photosphere is a star's outer shell from which light is radiated. The term itself is derived from Ancient Greek roots, φῶς, φωτός/"phos, photos" meaning "light" and σφαῖρα/"sphaira" meaning "sphere", in reference to it being a spherical surface that is perceived to emit light. It extends into a star's surface until the plasma becomes opaque, equivalent to an optical depth of approximately 2/3, or equivalently, a depth from which 50% of light will escape without being scattered. In other words, a photosphere is the
A Star Is Born (2018 film) Ultra HD Blu-ray on February 19. The home video release will feature 10 minutes of never-before-seen musical performances by Cooper and Gaga, and jam recording sessions of songs like "Midnight Special", "Is That Alright?" and "Baby What You Want Me to Do". A behind-the-scenes feature called "The Road to Stardom: Making A Star Is Born" would also be included along with the music videos for songs from the soundtrack: "Shallow", "Always Remember Us This Way", "Look What I Found" and "I'll Never Love Again". The 4K Blu-ray format will have Dolby Vision high-dynamic-range video and Dolby Atmos sound which was