All Acronyms. TIL [Internet]; Jan 17, 2018 [cited 2018 Jan 17]. Available from: http://www.allacronyms.com/TIL. MHRA 'TIL', All Acronyms, 17 January 2018, <http://www.allacronyms.com/TIL> [accessed 17 January 2018] Bluebook All Acronyms, TIL (Jan. 17, 2018, 4:01 PM), available at http://www.allacronyms.com/TIL. CSE All Acronyms. TIL [Internet]; January 17, 2018 [cited 2018 JAN 17]. Available from: http://www.allacronyms.com/TIL.
Main sequence fitting also determines distances using the HR Diagram but is always applied to clusters of stars. These stars are gravitationally bound, all located at the same distance, and formed at the same time from the same cloud of gas and dust. It is assumed that the members of a cluster will be found at the same locations as stars in general on the HR diagram. Thus, 90% of the cluster stars are on the main sequence.
Main sequence stars are stars, like our Sun, that fuse hydrogen atoms together to make helium atoms in their cores. For a given chemical composition and stellar age, a stars' luminosity, the total energy radiated by the star per unit time, depends only on its mass.ain sequence stars are stars, like our Sun, that fuse hydrogen atoms together to make helium atoms in their cores. For a given chemical composition and stellar age, a stars' luminosity, the total energy radiated by the star per unit time, depends only on its mass.