Based on strict dictionary definitions, "astronomy" refers to "the study of objects and matter outside the Earth's atmosphere and of their physical and chemical properties" In some cases, as in the introduction of the introductory textbook The Physical Universe by Frank Shu, "astronomy" may be used to describe the qualitative study of the subject. Astronomy focuses on celestial objects, space, and the physical universe as a whole. Observations of the Sun, Moon, stars, and planets have formed the basis of timekeeping and navigation.
Read more about Theoretical Astronomy.
Some articles on theoretical astronomy:
... fusion R-process S-process Nuclear fission Theoretical astronomers use a wide variety of tools which include analytical models (for example, polytropes to approximate the behaviors ... Theorists in astronomy endeavor to create theoretical models and figure out the observational consequences of those models ... Topics studied by theoretical astronomers include stellar dynamics and evolution galaxy formation large-scale structure of matter in the Universe origin of cosmic rays general relativity and physical ...
Famous quotes containing the words astronomy and/or theoretical:
“It is noticed, that the consideration of the great periods and spaces of astronomy induces a dignity of mind, and an indifference to death.”
—Ralph Waldo Emerson (18031882)
“The hypothesis I wish to advance is that ... the language of morality is in ... grave disorder.... What we possess, if this is true, are the fragments of a conceptual scheme, parts of which now lack those contexts from which their significance derived. We possess indeed simulacra of morality, we continue to use many of the key expressions. But we havevery largely if not entirelylost our comprehension, both theoretical and practical, of morality.”
—Alasdair Chalmers MacIntyre (b. 1929)