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| abstraction > hypothesis > theory > astronomy theory > galaxy theory > Tully-Fisher relation |
| Tully-Fisher relation | ||||
| subject | fact | |||
| Tully-Fisher relation | has definition An observed relation between the intrinsic luminosity of a spiral galaxy and the rotational speed of its stars. More luminous galaxies have stars that are moving faster. | ![]() |
| is a kind of galaxy theory | ![]() | |
| galaxy theory | has domain extragalactic astronomy | ![]() |
| theory | has validity correct or incorrect with caveats | ![]() |
| has author or reasearch group | ![]() | |
| has date or a range of dates for which the theory was active | ![]() |