- Chamber music (Wikipedia)
Chamber music is a form of classical music that is composed for a small group of instruments—traditionally a group that could fit in a palace chamber or a large room. Most broadly, it includes any art music that is performed by a small number of performers, with one performer to a part (in contrast to orchestral music, in which each string part is played by a number of performers). However, by convention, it usually does not include solo instrument performances.
- Delta Persei (stars.astro.illinois.edu)
DELTA PER (Delta Persei). Dominated as it is by its two brightest stars, Mirfak and Algol (Alpha and Beta Persei), the next four stars of glorious Perseus, the mythical rescuer of Andromeda, are often ignored. This quartet, which consists of Gamma, Delta, Epsilon, and Zeta, are all nearly the same mid-third magnitude brightness, and add great sparkle to the northern constellation.
- Delta Persei (Wikipedia)
Delta Persei (Delta Per, δ Persei, δ Per) is a double star in the northern constellation of Perseus. It has an apparent visual magnitude of 3.01, making it readily visible with the naked eye. Parallax measurements give it a distance of about 520 light-years (160 parsecs) from the Earth.