Shell star variables. Pleione and Gamma Cassiopeiae itself are both variable stars that have intermittent shell episodes where strong shell features appear in the spectrum and the brightness increases or decreases significantly. At other times the shell is not detectable in the spectrum, and even the emission lines may disappear. Shell star A shell star is a star having a spectrum that shows extremely broad absorption lines, plus some very narrow absorption lines. They typically also show some emission lines, usually from the Balmer series but occasionally of other lines. The broad absorption lines are due to rapid rotation of the photosphere,
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