Astronomy | Definition, History, Discoveries, & Facts | Britannica
https://www.britannica.com/science/astronomy
Since the late 19th century, astronomy has expanded to include astrophysics, the application of …Its great advances notwithstanding, astronomy is still subject to a major constraint: it is inherently an observational rather than an experimental science. Almost all measurements must be performed at great distances from the objects of interest, with no control over such quantities a…
Since the late 19th century, astronomy has expanded to include astrophysics, the application of …Its great advances notwithstanding, astronomy is still subject to a major constraint: it is inherently an observational rather than an experimental science. Almost all measurements must be performed at great distances from the objects of interest, with no control over such quantities a…
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