Search results
Results from the WOW.Com Content Network
A star schema is a data model for data warehouses and dimensional data marts that consists of one or more fact tables and dimension tables. Learn about the benefits, types, and examples of star schemas, and how they differ from snowflake schemas.
Learn how stars are modeled based on their mass, energy transport, and evolution. Find out the equations, layers, and mechanisms of stellar structure and how they vary for different types of stars.
The H-R diagram can be used by scientists to roughly measure how far away a star cluster or galaxy is from Earth. This can be done by comparing the apparent magnitudes of the stars in the cluster to the absolute magnitudes of stars with known distances (or of model stars).
The Sun's spectral type is G2V, indicating a main-sequence star with a surface temperature around 5,800 K. Learn about the history, methods and systems of classifying stars based on their spectral characteristics.
Learn how stars form from interstellar clouds, molecular clouds and Bok globules, and how they are influenced by gravity, pressure, temperature and triggers. Explore the history, theory and examples of star formation in different galaxies and regions.
A snowflake schema is a variation of the star schema, featuring normalization of dimension tables. Learn the benefits, disadvantages, examples and references of this logical arrangement of tables in a multidimensional database.
An astronomical object is a naturally occurring physical entity, association, or structure that exists within the observable universe. Learn about the history, classification, and examples of astronomical objects, from stars and planets to galaxies and clusters.
A star system is a small number of stars that orbit each other, bound by gravitational attraction. Learn about different types of star systems, such as binary, triple, quadruple, and hierarchical systems, and see examples and diagrams.