The article critiques the common recommendation of starting amateur astronomy with the Messier catalog, arguing that many Messier objects are low surface brightness and difficult for beginners to ...
The study is published in the latest issue of The American Journal of Physics ("All objects and some questions"). Masses, sizes, and relative densities of objects in our Universe. (© The American ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback