Graphing variables is a critical skill in science. If something depends on something else – like the speed of sounds depends on air density, or the surface gravity of an object depends on its size – ...

The film discusses the Sun, our nearest star, detailing how astronomers study it through solar observatories. It explains the Sun's characteristics, including its size, temperature, and composition, ...

A simple diagram, which celebrates its centennial this year, continues to serve as the most essential conceptual tool in stellar astrophysics Modern astronomy paints a vivid picture of the universe ...

HR Diagram by GeneSmith http://casswww.ucsd.edu/public/tutorial/HR.html A good, short summary of the HR diagram HR Diagram and Stellar Ages http://www.britannica.com ...

Our Sun is doomed. Billions of years from now, the Sun will deplete its hydrogen fuel and swell to a red giant before becoming a white dwarf. It’s a well-known story, and one astronomer has understood ...

Phil explains stars and how they can be categorized using their spectra. Today Phil's explaining the stars and how they can be categorized using their spectra. Together with their distance, this ...

IT has been suggested several times 1 that the flare activity observed in flash and U V Ceti stars is of a nature similar to that of solar flares. In this communication I shall adhere to this point of ...