Description
More than 5 current sources, of which at least 3 are peer-review journal articles or scholarly books.
Useful sites
The American Association of Amateur Astronomers https://www.astromax.org/ (Links to an external site.)
The American Association of Variable Star Observers https://www.aavso.org/ (Links to an external site.)
Sky & Telescope https://www.skyandtelescope.com/ (Links to an external site.)
Astronomy Magazine https://www.astronomy.com/ (Links to an external site.)
NASA https://www.astronomy.com/ (Links to an external site.)
European Space Agency https://www.esa.int/ (Links to an external site.)
International Astronomical Union https://www.iau.org/ (Links to an external site.)
Smithsonian Astrophysical Observatory https://www.cfa.harvard.edu/sao/ (Links to an external site.)
The SAO/NASA Astrophysics Data System https://adswww.harvard.edu/ (Links to an external site.)
New Hampshire Astronomical Society https://nhastro.org/ (Links to an external site.)
Minor Planet Center https://www.minorplanetcenter.net/ (Links to an external site.)
IAU Central Bureau for Astronomical Telegrams https://www.cbat.eps.harvard.edu/ (Links to an external site.)
United States Naval Observatory https://www.usno.navy.mil/USNO/ (Links to an external site.)
Sample Solution
