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OpenStax textbooks follow a traditional peer review process aimed at ensuring they meet a high quality standard before publication. Textbooks are developed and peer-reviewed by educators in an attempt to ensure they are readable and accurate, meet the scope and sequence requirements of each course, are supported by instructor ancillaries, and are available with the latest technology-based ...
Andrew Fraknoi. Andrew Fraknoi (born 1948) is a retired professor of astronomy recognized for his lifetime of work using everyday language to make astronomy more accessible and popular for both students and the general public. In 2017 Fraknoi retired from his position as Chair of the Department of Astronomy at Foothill College. In retirement he ...
George Preston. Sidney Carne Wolff (born 1941) is an American astrophysicist, researcher, public educator, and author. She is the first woman in the United States to head a major observatory, and she provided significant contributions to the construction of six telescopes. [1] Wolff served as Director of the Kitt Peak National Observatory (KPNO ...
In astrophysics and physical cosmology the mass-to-light ratio, normally designated with the Greek letter upsilon, ϒ, [1] is the quotient between the total mass of a spatial volume (typically on the scales of a galaxy or a cluster) and its luminosity. These ratios are often reported [why?] using the value calculated for the Sun as a baseline ...
Original file (1,275 × 1,650 pixels, file size: 153.7 MB, MIME type: application/pdf, 1,206 pages) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Classical Cepheids are a type of Cepheid variable star. They are young, population I variable stars that exhibit regular radial pulsations with periods of a few days to a few weeks and visual amplitudes ranging from a few tenths of a magnitude up to about 2 magnitudes. Classical Cepheids are also known as Population I Cepheids, Type I Cepheids ...
OpenStax's stated mission is to create professional grade textbooks for the highest-enrollment undergraduate college courses that are the same quality as traditional textbooks, but are adaptable and available free to students. [115] Other initiatives derived from MIT OpenCourseWare are China Open Resources for Education and OpenCourseWare in ...
Spectroscopy is the field of study that measures and interprets electromagnetic spectra. [1][2] In narrower contexts, spectroscopy is the precise study of color as generalized from visible light to all bands of the electromagnetic spectrum. Spectroscopy, primarily in the electromagnetic spectrum, is a fundamental exploratory tool in the fields ...