feat: add parsing more constituents for #351 (#395)
docs: add figure for tidal spectra (#395)
feat: option to set p' to 0 for sa and sta (#396)
docs: add polar motion plot (#396)
docs: add leap seconds to delta time plot (#396)
docs: add more descriptors for constituents (#396)
test: add check for climatologically affected constituents (#396)
docs: add more background (#397)
docs: use math format for inline variables (#397)
docs: update delta time plot (#397)
docs: add Astronomy card to background (#397)
docs: move nutation to Astronomy (#397)
docs: add geoid height section (#397)
refactor: changed argument for method calculating mean longitudes (#398)
test: added test for comparing mean longitude methods (#398)
docs: add more to Astronomy background text (#398)
refactor: split ICRS rotation matrix from the ITRS function (#399)
feat: added function to correct for aberration effects (#399)
chore: bump required timescale version to 0.0.8 (#399)
docs: add more astro citations from comments (#399)
docs: expand sidereal time subsection (#400)
docs: add geodetic coordinate system paragraph (#400)
docs: improvements to citations and references (#400)
docs: add more terms to the glossary (#400)
docs: make dynamical time a subsection in Time (#400)
docs: add more notes to astro function docstrings (#400)
docs: edit background text for clarity (#401)
feat: add 1066A-N and 1066A-S Earth models to Love number calculation (#402)
feat: add more ellipsoidal parameters to datum class (#402)
docs: add section for Celestial Reference Systems (#402)
test: add Love number ratio check (#402)
docs: add reference to J. Wahr 1979 PhD thesis (#402)
docs: add Love numbers plot from Wahr [76] (#402)
feat: use string mapping to remap non-numeric Doodson numbers (#404)
feat: added function to calculate equation of time (#404)
docs: add inverse calculation of Doodson and Delaunay arguments (#404)
docs: update constituent table (#404)
docs: include LSSD to tide gauge comparison (#404)
docs: update dictionary keys (#404)
feat: use schureman_arguments function for FES nodal variables (#405)
refactor: convert longitudes p and n to radians within nodal function (#405)
test: moved astro tests into new module (#405)
feat: added Schureman to list of M1 options in nodal arguments (#406)
test: include schureman argument test at 1900 (#406)
fix: use flexible case for mean longitude method strings (#406)