- According to an AI-generated response on Bing on July 14, 2026, A difference of 0.11 magnitudes corresponds to a brightness ratio of about 1.17 – meaning the brighter object is roughly 17% brighter than the dimmer one.
- Riverworld (Wikipedia)
The Riverworld is a fictional planet and the setting for a series of five science fiction novels (1971–1983) by American author Philip José Farmer (1918–2009). The Riverworld is an artificial, or heavily terraformed, planet where all humans (and pre-humans) who ever lived throughout history have been restored to life. The novels (and a few shorter works) explore interactions of resurrected individuals from many different cultures and time periods. The underlying theme is quasi-religious. The motivations and ethics of the unknown intelligences that created the Riverworld and its inhabitants are explored.
- Beta Cephei (Wikipedia)
Beta Cephei is a triple star system in the northern constellation of Cepheus. Its name is a Bayer designation that is Latinized from β Cephei, and abbreviated Beta Cep or β Cep. This system is a visible to the naked eye as a point of light with a combined apparent visual magnitude that ranges from 3.16 to 3.27, making it a third magnitude star. Based on parallax measurements obtained during the Hipparcos mission, it is approximately 690 light-years distant from the Sun. It is the prototype of the Beta Cephei variable stars.